{"id":3768,"date":"2021-11-25T21:49:58","date_gmt":"2021-11-26T05:49:58","guid":{"rendered":"https:\/\/www.xh86.me\/?p=3768"},"modified":"2021-11-25T22:22:36","modified_gmt":"2021-11-26T06:22:36","slug":"mpls%ef%bc%9a%e5%a4%9a%e5%8d%8f%e8%ae%ae%e6%a0%87%e7%ad%be%e4%ba%a4%e6%8d%a2%e6%9e%b6%e6%9e%84","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=3768","title":{"rendered":"MPLS\uff1a\u591a\u534f\u8bae\u6807\u7b7e\u4ea4\u6362\u67b6\u6784"},"content":{"rendered":"
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<\/div><\/p>\n

 <\/p>\n<\/section>\n

\n
    \n
  • <\/li>\n<\/ul>\n
    RFC3031\uff1aMultiprotocol Label Switching Architecture\uff0cJanuary 2001<\/span><\/code><\/pre>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    \u672c\u5907\u5fd8\u5f55\u7684\u72b6\u6001<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u6587\u6863\u4e3a Internet \u793e\u533a\u6307\u5b9a\u4e86 Internet \u6807\u51c6\u8ddf\u8e2a\u534f\u8bae\uff0c\u5e76\u8bf7\u6c42\u8ba8\u8bba\u548c\u6539\u8fdb\u5efa\u8bae\u3002\u672c\u534f\u8bae\u7684\u6807\u51c6\u5316\u72b6\u6001\u548c\u73b0\u72b6\u8bf7\u53c2\u8003\u5f53\u524d\u7248\u672c\u7684\u300a\u4e92\u8054\u7f51\u5b98\u65b9\u534f\u8bae\u6807\u51c6\u300b\uff08STD 1\uff09\u3002\u672c\u5907\u5fd8\u5f55\u7684\u5206\u53d1\u4e0d\u53d7\u9650\u5236\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    \u7248\u6743\u58f0\u660e<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7248\u6743\u6240\u6709 (C) \u4e92\u8054\u7f51\u534f\u4f1a (2001)\u3002\u7248\u6743\u6240\u6709\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    \u6897\u6982<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u6587\u6863\u89c4\u5b9a\u4e86\u591a\u534f\u8bae\u6807\u7b7e\u4ea4\u6362 (Multiprotocol Label Switching\uff0cMPLS) <\/strong>\u7684\u67b6\u6784\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    1\u3001 \u89c4\u8303<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u6587\u6863\u4e2d\u7684\u5173\u952e\u8bcd\u201c\u5fc5\u987b\u201d\u3001\u201c\u4e0d\u5f97\u201d\u3001\u201c\u9700\u8981\u201d\u3001\u201c\u5e94\u8be5\u201d\u3001\u201c\u4e0d\u5e94\u201d\u3001\u201c\u5e94\u8be5\u201d\u3001\u201c\u4e0d\u5e94\u8be5\u201d\u3001\u201c\u63a8\u8350\u201d\u3001\u201c\u53ef\u4ee5\u201d\u548c\u201c\u53ef\u9009\u201d\u662f\u6309\u7167 RFC 2119 \u4e2d\u7684\u63cf\u8ff0\u8fdb\u884c\u89e3\u91ca\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    2\u3001 MPLS \u4ecb\u7ecd<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u6587\u6863\u89c4\u5b9a\u4e86\u591a\u534f\u8bae\u6807\u7b7e\u4ea4\u6362 (MPLS) \u7684\u67b6\u6784\u3002<\/p>\n
    \u8bf7\u6ce8\u610f\uff0cMPLS \u7528\u4e8e\u7ec4\u64ad\u7684\u4f7f\u7528\u7559\u5f85\u8fdb\u4e00\u6b65\u7814\u7a76\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    2.1\u3001 \u6982\u8ff0<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53\u65e0\u8fde\u63a5\u7f51\u7edc\u5c42\u534f\u8bae\u7684\u6570\u636e\u5305\u4ece\u4e00\u4e2a\u8def\u7531\u5668\u4f20\u8f93\u5230\u4e0b\u4e00\u4e2a\u8def\u7531\u5668\u65f6\uff0c\u6bcf\u4e2a\u8def\u7531\u5668\u90fd\u4f1a\u4e3a\u8be5\u6570\u636e\u5305\u505a\u51fa\u72ec\u7acb\u7684\u8f6c\u53d1\u51b3\u7b56\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6bcf\u4e2a\u8def\u7531\u5668\u90fd\u4f1a\u5206\u6790\u6570\u636e\u5305\u7684\u5934\u90e8\uff0c\u5e76\u4e14\u6bcf\u4e2a\u8def\u7531\u5668\u90fd\u8fd0\u884c\u7f51\u7edc\u5c42\u8def\u7531\u7b97\u6cd5\u3002\u6bcf\u4e2a\u8def\u7531\u5668\u6839\u636e\u5bf9\u6570\u636e\u5305\u62a5\u6587\u5934\u7684\u5206\u6790\u548c\u8fd0\u884c\u8def\u7531\u7b97\u6cd5\u7684\u7ed3\u679c\uff0c\u72ec\u7acb\u5730\u4e3a\u6570\u636e\u5305\u9009\u62e9\u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u5305\u5934\u5305\u542b\u7684\u4fe1\u606f\u8fdc\u591a\u4e8e\u7b80\u5355\u5730\u9009\u62e9\u4e0b\u4e00\u8df3\u6240\u9700\u7684\u4fe1\u606f\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u9009\u62e9\u4e0b\u4e00\u8df3\u89c6\u4e3a\u4e24\u4e2a\u51fd\u6570\u7684\u7ec4\u5408\u3002\u7b2c\u4e00\u4e2a\u51fd\u6570\u5c06\u6574\u7ec4\u53ef\u80fd\u7684\u6570\u636e\u5305\u5212\u5206\u4e3a\u4e00\u7ec4\u201c\u8f6c\u53d1\u7b49\u6548\u7c7b\uff08Forwarding Equivalence Classes\uff0cFEC\uff09<\/strong>\u201d\u3002\u7b2c\u4e8c\u4e2a\u5c06\u6bcf\u4e2a FEC \u6620\u5c04\u5230\u4e0b\u4e00\u8df3\u3002\u5c31\u8f6c\u53d1\u51b3\u7b56\u800c\u8a00\uff0c\u6620\u5c04\u5230\u540c\u4e00 FEC \u7684\u4e0d\u540c\u6570\u636e\u5305\u662f\u65e0\u6cd5\u533a\u5206\u7684\u3002\u5c5e\u4e8e\u7279\u5b9a FEC \u5e76\u4ece\u7279\u5b9a\u8282\u70b9\u4f20\u64ad\u7684\u6240\u6709\u6570\u636e\u5305\u90fd\u5c06\u9075\u5faa\u76f8\u540c\u7684\u8def\u5f84\uff08\u6216\u8005\u5982\u679c\u6b63\u5728\u4f7f\u7528\u67d0\u4e9b\u7c7b\u578b\u7684\u591a\u8def\u5f84\u8def\u7531\uff0c\u5b83\u4eec\u90fd\u5c06\u9075\u5faa\u4e0e FEC \u76f8\u5173\u8054\u7684\u4e00\u7ec4\u8def\u5f84\u4e4b\u4e00\uff09\u3002<\/p>\n
    \u5728\u4f20\u7edf\u7684 IP \u8f6c\u53d1\u4e2d\uff0c\u5982\u679c\u7279\u5b9a\u8def\u7531\u5668\u7684\u8def\u7531\u8868\u4e2d\u5b58\u5728\u67d0\u4e2a\u5730\u5740\u524d\u7f00 X\uff0c\u4f7f\u5f97 X \u662f\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u76ee\u6807\u5730\u5740\u7684\u201c\u6700\u957f\u5339\u914d\u201d\uff0c\u5219\u8be5\u8def\u7531\u5668\u901a\u5e38\u4f1a\u5c06\u4e24\u4e2a\u6570\u636e\u5305\u89c6\u4e3a\u5728\u540c\u4e00\u4e2a FEC \u4e2d\u3002\u5f53\u6570\u636e\u5305\u7a7f\u8fc7\u7f51\u7edc\u65f6\uff0c\u6bcf\u4e00\u8df3\u4f9d\u6b21\u91cd\u65b0\u68c0\u67e5\u6570\u636e\u5305\u5e76\u5c06\u5176\u5206\u914d\u7ed9 FEC\u3002<\/p>\n
    \u5728 MPLS \u4e2d\uff0c\u5f53\u6570\u636e\u5305\u8fdb\u5165\u7f51\u7edc\u65f6\uff0c\u5c06\u7279\u5b9a\u6570\u636e\u5305\u5206\u914d\u7ed9\u7279\u5b9a FEC \u53ea\u9700\u4e00\u6b21\u3002\u6570\u636e\u5305\u88ab\u5206\u914d\u5230\u7684 FEC \u88ab\u7f16\u7801\u4e3a\u4e00\u4e2a\u77ed\u7684\u56fa\u5b9a\u957f\u5ea6\u503c\uff0c\u79f0\u4e3a\u201c\u6807\u7b7e\/label<\/strong>\u201d\u3002\u5f53\u4e00\u4e2a\u6570\u636e\u5305\u88ab\u8f6c\u53d1\u5230\u5b83\u7684\u4e0b\u4e00\u8df3\u65f6\uff0c\u6807\u7b7e\u4e5f\u968f\u4e4b\u53d1\u9001\uff1b\u4e5f\u5c31\u662f\u8bf4\uff0c\u6570\u636e\u5305\u5728\u8f6c\u53d1\u4e4b\u524d\u88ab\u201c\u6807\u8bb0\/labeled<\/strong>\u201d\u3002<\/p>\n
    \u5728\u540e\u7eed\u7684\u8dc3\u70b9\u4e0a\uff0c\u4e0d\u4f1a\u5bf9\u6570\u636e\u5305\u7684\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u8fdb\u884c\u8fdb\u4e00\u6b65\u5206\u6790\u3002\u76f8\u53cd\uff0c\u6807\u7b7e\u7528\u4f5c\u6307\u5b9a\u4e0b\u4e00\u8df3\u548c\u65b0\u6807\u7b7e\u7684\u8868\u7684\u7d22\u5f15\u3002\u65e7\u6807\u7b7e\u88ab\u65b0\u6807\u7b7e\u66ff\u6362\uff0c\u6570\u636e\u5305\u88ab\u8f6c\u53d1\u5230\u5b83\u7684\u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u5728 MPLS \u8f6c\u53d1\u8303\u5f0f\u4e2d\uff0c\u4e00\u65e6\u6570\u636e\u5305\u88ab\u5206\u914d\u7ed9 FEC\uff0c\u540e\u7eed\u8def\u7531\u5668\u5c31\u4e0d\u518d\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u62a5\u6587\u5934\u5206\u6790\uff1b\u6240\u6709\u8f6c\u53d1\u90fd\u662f\u7531\u6807\u7b7e\u9a71\u52a8\u7684\u3002\u4e0e\u4f20\u7edf\u7684\u7f51\u7edc\u5c42\u8f6c\u53d1\u76f8\u6bd4\uff0c\u8fd9\u5177\u6709\u8bb8\u591a\u4f18\u70b9\u3002<\/p>\n
    \n
    – MPLS \u8f6c\u53d1\u53ef\u4ee5\u7531\u80fd\u591f\u8fdb\u884c\u6807\u7b7e\u67e5\u627e\u548c\u66ff\u6362\uff0c\u4f46\u4e0d\u80fd\u5206\u6790\u7f51\u7edc\u5c42\u62a5\u6587\u5934\uff0c\u6216\u8005\u4e0d\u80fd\u4ee5\u8db3\u591f\u7684\u901f\u5ea6\u5206\u6790\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u7684\u4ea4\u6362\u673a\u6765\u5b8c\u6210\u3002<\/strong><\/p>\n
    – \u7531\u4e8e\u6570\u636e\u5305\u5728\u8fdb\u5165\u7f51\u7edc\u65f6\u88ab\u5206\u914d\u7ed9 FEC\uff0c\u5165\u53e3\u8def\u7531\u5668\u53ef\u4ee5\u5728\u786e\u5b9a\u5206\u914d\u65f6\u4f7f\u7528\u5b83\u62e5\u6709\u7684\u5173\u4e8e\u6570\u636e\u5305\u7684\u4efb\u4f55\u4fe1\u606f\uff0c\u5373\u4f7f\u8be5\u4fe1\u606f\u65e0\u6cd5\u4ece\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u4e2d\u6536\u96c6\u3002\u4f8b\u5982\uff0c\u5230\u8fbe\u4e0d\u540c\u7aef\u53e3\u7684\u6570\u636e\u5305\u53ef\u80fd\u4f1a\u5206\u914d\u7ed9\u4e0d\u540c\u7684 FEC\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u4f20\u7edf\u7684\u8f6c\u53d1\u53ea\u80fd\u8003\u8651\u5728\u5305\u5934\u4e2d\u4e0e\u5305\u4e00\u8d77\u4f20\u8f93\u7684\u4fe1\u606f\u3002<\/strong><\/p>\n
    – \u5728\u7279\u5b9a\u8def\u7531\u5668\u8fdb\u5165\u7f51\u7edc\u7684\u6570\u636e\u5305\u53ef\u4ee5\u4e0e\u5728\u4e0d\u540c\u8def\u7531\u5668\u8fdb\u5165\u7f51\u7edc\u7684\u76f8\u540c\u6570\u636e\u5305\u6807\u8bb0\u4e0d\u540c\uff0c\u56e0\u6b64\u53ef\u4ee5\u8f7b\u677e\u505a\u51fa\u4f9d\u8d56\u4e8e\u5165\u53e3\u8def\u7531\u5668\u7684\u8f6c\u53d1\u51b3\u7b56\u3002\u8fd9\u4e0d\u80fd\u901a\u8fc7\u4f20\u7edf\u8f6c\u53d1\u6765\u5b8c\u6210\uff0c\u56e0\u4e3a\u6570\u636e\u5305\u7684\u5165\u53e3\u8def\u7531\u5668\u7684\u8eab\u4efd\u4e0d\u4e0e\u6570\u636e\u5305\u4e00\u8d77\u4f20\u64ad\u3002<\/strong><\/p>\n
    – \u51b3\u5b9a\u5982\u4f55\u5c06\u6570\u636e\u5305\u5206\u914d\u7ed9 FEC \u7684\u8003\u8651\u53ef\u80fd\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u800c\u5bf9\u4ec5\u8f6c\u53d1\u6807\u8bb0\u6570\u636e\u5305\u7684\u8def\u7531\u5668\u6ca1\u6709\u4efb\u4f55\u5f71\u54cd\u3002<\/strong><\/p>\n
    – \u6709\u65f6\u9700\u8981\u5f3a\u5236\u6570\u636e\u5305\u9075\u5faa\u5728\u6570\u636e\u5305\u8fdb\u5165\u7f51\u7edc\u65f6\u6216\u4e4b\u524d\u660e\u786e\u9009\u62e9\u7684\u7279\u5b9a\u8def\u7531\uff0c\u800c\u4e0d\u662f\u5728\u6570\u636e\u5305\u901a\u8fc7\u7f51\u7edc\u65f6\u7531\u6b63\u5e38\u52a8\u6001\u8def\u7531\u7b97\u6cd5\u9009\u62e9\u3002\u8fd9\u53ef\u4ee5\u4f5c\u4e3a\u7b56\u7565\u95ee\u9898\u6216\u652f\u6301\u6d41\u91cf\u5de5\u7a0b\u6765\u5b8c\u6210\u3002\u5728\u4f20\u7edf\u8f6c\u53d1\u4e2d\uff0c\u8fd9\u9700\u8981\u6570\u636e\u5305\u643a\u5e26\u5176\u8def\u7531\u7684\u7f16\u7801\uff08\u201c\u6e90\u8def\u7531\u201d\uff09\u3002\u5728 MPLS \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6807\u7b7e\u6765\u8868\u793a\u8def\u7531\uff0c\u8fd9\u6837\u663e\u5f0f\u8def\u7531\u7684\u8eab\u4efd\u5c31\u4e0d\u9700\u8981\u968f\u5305\u643a\u5e26\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u4e00\u4e9b\u8def\u7531\u5668\u5206\u6790\u6570\u636e\u5305\u7684\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u4e0d\u4ec5\u662f\u4e3a\u4e86\u9009\u62e9\u6570\u636e\u5305\u7684\u4e0b\u4e00\u8df3\uff0c\u8fd8\u53ef\u4ee5\u786e\u5b9a\u6570\u636e\u5305\u7684\u201c\u4f18\u5148\u7ea7\u201d\u6216\u201c\u670d\u52a1\u7b49\u7ea7\u201d\u3002\u7136\u540e\u4ed6\u4eec\u53ef\u4ee5\u5bf9\u4e0d\u540c\u7684\u6570\u636e\u5305\u5e94\u7528\u4e0d\u540c\u7684\u4e22\u5f03\u9608\u503c\u6216\u8c03\u5ea6\u89c4\u5219\u3002 MPLS \u5141\u8bb8\uff08\u4f46\u4e0d\u8981\u6c42\uff09\u4ece\u6807\u7b7e\u4e2d\u5b8c\u5168\u6216\u90e8\u5206\u63a8\u65ad\u4f18\u5148\u7ea7\u6216\u670d\u52a1\u7c7b\u522b\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8bf4\u6807\u7b7e\u4ee3\u8868 FEC \u548c\u4f18\u5148\u7ea7\u6216\u670d\u52a1\u7c7b\u522b\u7684\u7ec4\u5408\u3002<\/p>\n
    MPLS \u4ee3\u8868\u201c\u591a\u534f\u8bae\u201d\u6807\u7b7e\u4ea4\u6362\uff0c\u591a\u534f\u8bae\uff0c\u56e0\u4e3a\u5b83\u7684\u6280\u672f\u9002\u7528\u4e8e\u4efb\u4f55\u7f51\u7edc\u5c42\u534f\u8bae\u3002\u7136\u800c\uff0c\u5728\u672c\u6587\u6863\u4e2d\uff0c\u6211\u4eec\u4e13\u6ce8\u4e8e\u4f7f\u7528 IP \u4f5c\u4e3a\u7f51\u7edc\u5c42\u534f\u8bae\u3002<\/p>\n
    \u652f\u6301 MPLS \u7684\u8def\u7531\u5668\u79f0\u4e3a\u201c\u6807\u7b7e\u4ea4\u6362\u8def\u7531\u5668\u201d\u6216 LSR\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    2.2\u3001 \u672f\u8bed<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u8282\u7ed9\u51fa\u4e86\u672c\u6587\u6863\u4e2d\u4f7f\u7528\u7684\u672f\u8bed\u7684\u4e00\u822c\u6982\u5ff5\u6982\u8ff0\u3002\u5176\u4e2d\u4e00\u4e9b\u672f\u8bed\u5728\u6587\u6863\u7684\u540e\u9762\u90e8\u5206\u6709\u66f4\u7cbe\u786e\u7684\u5b9a\u4e49\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    DLCI<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5e27\u4e2d\u7ee7\u7f51\u7edc\u4e2d\u7528\u4e8e\u6807\u8bc6\u5e27\u4e2d\u7ee7\u7535\u8def\u7684\u6807\u7b7e<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u8f6c\u53d1\u7b49\u4ef7\u7c7b<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u7ec4\u4ee5\u76f8\u540c\u65b9\u5f0f\u8f6c\u53d1\u7684 IP \u6570\u636e\u5305\uff08\u4f8b\u5982\uff0c\u901a\u8fc7\u76f8\u540c\u7684\u8def\u5f84\uff0c\u5177\u6709\u76f8\u540c\u7684\u8f6c\u53d1\u5904\u7406\uff09<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u5e27\u5408\u5e76\/ frame merge<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u5408\u5e76\uff0c\u5f53\u5b83\u5e94\u7528\u4e8e\u57fa\u4e8e\u5e27\u7684\u5a92\u4ecb\u4e0a\u7684\u64cd\u4f5c\u65f6\uff0c\u56e0\u6b64\u4fe1\u5143\u4ea4\u7ec7\u7684\u6f5c\u5728\u95ee\u9898\u4e0d\u662f\u95ee\u9898\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\/ label<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u77ed\u7269\u7406\u8fde\u7eed\u6807\u8bc6\u7b26\uff0c\u7528\u4e8e\u6807\u8bc6 FEC\uff0c\u901a\u5e38\u5177\u6709\u672c\u5730\u610f\u4e49\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u5408\u5e76\/ label merging<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7528\u5355\u4e2a\u8f93\u51fa\u6807\u7b7e\u66ff\u6362\u7279\u5b9a FEC \u7684\u591a\u4e2a\u8f93\u5165\u6807\u7b7e<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u4ea4\u6362\/ label swap<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u57fa\u672c\u8f6c\u53d1\u64cd\u4f5c\u5305\u62ec\u67e5\u627e\u4f20\u5165\u6807\u7b7e\u4ee5\u786e\u5b9a\u4f20\u51fa\u6807\u7b7e\u3001\u5c01\u88c5\u3001\u7aef\u53e3\u548c\u5176\u4ed6\u6570\u636e\u5904\u7406\u4fe1\u606f\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u4ea4\u6362\/ label swapping<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u79cd\u8f6c\u53d1\u8303\u5f0f\uff0c\u5141\u8bb8\u901a\u8fc7\u4f7f\u7528\u6807\u7b7e\u6765\u8bc6\u522b\u5728\u8f6c\u53d1\u65f6\u65e0\u6cd5\u533a\u5206\u7684\u6570\u636e\u5305\u7c7b\u522b\u6765\u7b80\u5316\u6570\u636e\u8f6c\u53d1\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u4ea4\u6362\u8df3\/ label switched hop<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e24\u4e2a MPLS \u8282\u70b9\u4e4b\u95f4\u7684\u8df3\uff0c\u5728\u8be5\u8282\u70b9\u4e0a\u4f7f\u7528\u6807\u7b7e\u5b8c\u6210\u8f6c\u53d1\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u4ea4\u6362\u8def\u5f84\/ label switched path<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u901a\u8fc7\u4e00\u4e2a\u6216\u591a\u4e2a\u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u4e00\u4e2a\u6216\u591a\u4e2a LSR \u7684\u8def\u5f84\uff0c\u540e\u8ddf\u7279\u5b9a FEC \u4e2d\u7684\u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u4ea4\u6362\u8def\u7531\u5668\/ label switching router<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u80fd\u591f\u8f6c\u53d1\u672c\u5730 L3 \u6570\u636e\u5305\u7684 MPLS \u8282\u70b9<\/p>\n
    \n
    \n
    \n
    \n
    \n
    2\u5c42\/ layer 2<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    3\u5c42\u4e0b\u7684\u534f\u8bae\u5c42\uff08\u56e0\u6b64\u63d0\u4f9b3\u5c42\u4f7f\u7528\u7684\u670d\u52a1\uff09\u3002\u5f53\u901a\u8fc7\u4ea4\u6362\u77ed\u56fa\u5b9a\u957f\u5ea6\u6807\u7b7e\u5b8c\u6210\u65f6\uff0c\u8f6c\u53d1\u53d1\u751f\u57282\u5c42\uff0c\u65e0\u8bba\u88ab\u68c0\u67e5\u7684\u6807\u7b7e\u662f ATM VPI\/VCI\u3001\u5e27\u4e2d\u7ee7 DLCI \u8fd8\u662f MPLS \u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    3\u5c42\/ layer 3<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    IP \u53ca\u5176\u76f8\u5173\u8def\u7531\u534f\u8bae\u8fd0\u884c\u7684\u534f\u8bae\u5c42\u4e0e2\u5c42\u540c\u4e49\u7684\u94fe\u8def\u5c42<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u73af\u8def\u68c0\u6d4b\/ loop detection<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u79cd\u5904\u7406\u73af\u8def\u7684\u65b9\u6cd5\uff0c\u5141\u8bb8\u8bbe\u7f6e\u73af\u8def\uff0c\u6570\u636e\u53ef\u80fd\u901a\u8fc7\u73af\u8def\u4f20\u8f93\uff0c\u4f46\u73af\u8def\u88ab\u68c0\u6d4b\u5230<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u9632\u6b62\u73af\u8def\/ loop prevention<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u79cd\u5904\u7406\u73af\u8def\u7684\u65b9\u6cd5\uff0c\u5176\u4e2d\u6570\u636e\u4ece\u4e0d\u901a\u8fc7\u73af\u8def\u4f20\u8f93<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u6807\u7b7e\u6808\/ label stack<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u7ec4\u6709\u5e8f\u7684\u6807\u7b7e<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u5408\u5e76\u70b9\/ merge point<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5b8c\u6210\u6807\u7b7e\u5408\u5e76\u7684\u8282\u70b9<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS\u57df\/ MPLS domain<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u7ec4\u8fde\u7eed\u7684\u8282\u70b9\uff0c\u5b83\u4eec\u8fd0\u884c MPLS \u8def\u7531\u548c\u8f6c\u53d1\uff0c\u5e76\u4e14\u4e5f\u5728\u4e00\u4e2a\u8def\u7531\u6216\u7ba1\u7406\u57df\u4e2d<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS \u8fb9\u7f18\u8282\u70b9\/ MPLS edge node<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5c06 MPLS \u57df\u4e0e\u57df\u5916\u8282\u70b9\u8fde\u63a5\u7684 MPLS \u8282\u70b9\uff0c\u8981\u4e48\u662f\u56e0\u4e3a\u5b83\u4e0d\u8fd0\u884c MPLS\uff0c\u8981\u4e48\u662f\u56e0\u4e3a\u5b83\u5728\u4e0d\u540c\u7684\u57df\u4e2d\u3002\u8bf7\u6ce8\u610f\uff0c\u5982\u679c LSR \u7684\u76f8\u90bb\u4e3b\u673a\u672a\u8fd0\u884c MPLS\uff0c\u5219\u8be5 LSR \u662f MPLS \u8fb9\u7f18\u8282\u70b9\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS \u51fa\u53e3\u8282\u70b9\/ MPLS egress node<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u4e2a MPLS \u8fb9\u7f18\u8282\u70b9\uff0c\u5728\u5b83\u79bb\u5f00 MPLS \u57df\u65f6\u5904\u7406\u6d41\u91cf<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS \u5165\u53e3\u8282\u70b9\/ MPLS ingress node<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u4e2a MPLS \u8fb9\u7f18\u8282\u70b9\uff0c\u5728\u5b83\u8fdb\u5165 MPLS \u57df\u65f6\u5904\u7406\u6d41\u91cf<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS\u6807\u7b7e\/ MPLS label<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6570\u636e\u5305\u5934\u4e2d\u643a\u5e26\u7684\u6807\u7b7e\uff0c\u4ee3\u8868\u6570\u636e\u5305\u7684 FEC<\/p>\n
    \n
    \n
    \n
    \n
    \n
    MPLS\u8282\u70b9\/ MPLS node<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8fd0\u884c MPLS \u7684\u8282\u70b9\u3002 MPLS \u8282\u70b9\u5c06\u4e86\u89e3 MPLS \u63a7\u5236\u534f\u8bae\uff0c\u5c06\u8fd0\u884c\u4e00\u4e2a\u6216\u591a\u4e2a L3 \u8def\u7531\u534f\u8bae\uff0c\u5e76\u80fd\u591f\u6839\u636e\u6807\u7b7e\u8f6c\u53d1\u6570\u636e\u5305\u3002 MPLS \u8282\u70b9\u4e5f\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u8f6c\u53d1\u672c\u5730 L3 \u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u591a\u534f\u8bae\u6807\u7b7e\u4ea4\u6362\/ MultiProtocol Label Switching<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    IETF \u5de5\u4f5c\u7ec4\u4ee5\u53ca\u4e0e\u5de5\u4f5c\u7ec4\u76f8\u5173\u7684\u5de5\u4f5c<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u7f51\u7edc\u5c42\/ network layer<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e0e3\u5c42\u540c\u4e49<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u5806\/ stack<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u5806\u6808\u7684\u540c\u4e49\u8bcd<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u4ea4\u6362\u8def\u5f84\/ switched path<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e0e\u6807\u7b7e\u4ea4\u6362\u8def\u5f84\u540c\u4e49<\/p>\n
    \n
    \n
    \n
    \n
    \n
    \u865a\u7535\u8def\/ virtual circuit<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u9762\u5411\u8fde\u63a5\u76842\u5c42\u6280\u672f\uff08\u4f8b\u5982 ATM \u6216\u5e27\u4e2d\u7ee7\uff09\u4f7f\u7528\u7684\u7535\u8def\uff0c\u9700\u8981\u57282\u5c42\u4ea4\u6362\u673a\u4e2d\u7ef4\u62a4\u72b6\u6001\u4fe1\u606f\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    VC\u5408\u5e76\/ VC merge<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u5408\u5e76\uff0cMPLS\u6807\u7b7e\u643a\u5e26\u5728ATM VCI\u57df\uff08\u6216VPI\/VCI\u7ec4\u5408\u57df\uff09\u4e2d\uff0c\u4f7f\u591a\u4e2aVC\u5408\u5e76\u4e3a\u4e00\u4e2aVC<\/p>\n
    \n
    \n
    \n
    \n
    \n
    VP\u5408\u5e76\/ VP merge<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u5408\u5e76\uff0c\u5728ATM VPI\u5b57\u6bb5\u4e2d\u643a\u5e26MPLS\u6807\u7b7e\uff0c\u53ef\u4ee5\u5c06\u591a\u4e2aVP\u5408\u5e76\u4e3a\u4e00\u4e2aVP\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4ec5\u5f53\u4e24\u4e2a\u5355\u5143\u6e90\u81ea\u540c\u4e00\u8282\u70b9\u65f6\uff0c\u5b83\u4eec\u624d\u4f1a\u5177\u6709\u76f8\u540c\u7684 VCI \u503c\u3002\u8fd9\u5141\u8bb8\u901a\u8fc7 VCI \u533a\u5206\u6765\u81ea\u4e0d\u540c\u6765\u6e90\u7684\u4fe1\u5143\u3002<\/p>\n
    \n
    \n
    \n
    \n
    \n
    VPI\/VCI<\/section>\n<\/section>\n<\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    ATM \u7f51\u7edc\u4e2d\u7528\u4e8e\u6807\u8bc6\u7535\u8def\u7684\u6807\u7b7e<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    2.3\u3001 \u7f29\u7565\u8bed<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \n
    ATM\uff1aAsynchronous Transfer Mode\uff0c\u5f02\u6b65\u4f20\u8f93\u6a21\u5f0f<\/span><\/code>BGP\uff1aBorder Gateway Protocol\uff0c\u8fb9\u754c\u7f51\u5173\u534f\u8bae<\/span><\/code>DLCI\uff1aData Link Circuit Identifier\uff0c\u6570\u636e\u94fe\u8def\u7535\u8def\u6807\u8bc6\u7b26<\/span><\/code>FEC\uff1aForwarding Equivalence Class\uff0c\u8f6c\u53d1\u7b49\u6548\u7c7b<\/span><\/code>FTN\uff1aFEC to NHLFE Map<\/span>\uff0cFEC\u5230NHLFE\u7684\u6620\u5c04<\/span><\/code>IGP\uff1aInterior Gateway Protocol\uff0c\u5185\u90e8\u7f51\u5173\u534f\u8bae<\/span><\/code>ILM\uff1aIncoming Label Map<\/span>\uff0c\u4f20\u5165\u6807\u7b7e\u6620\u5c04<\/span><\/code>IP\uff1aInternet Protocol\uff0c\u4e92\u8054\u7f51\u534f\u8bae<\/span><\/code>LDP\uff1aLabel Distribution Protocol\uff0c\u6807\u7b7e\u5206\u53d1\u534f\u8bae<\/span><\/code>L2\uff1aLayer 2<\/span>\uff0c2<\/span>\u5c42<\/span><\/code>L3\uff1aLayer 3<\/span>\uff0c3<\/span>\u5c42<\/span><\/code>LSP\uff1aLabel Switched Path\uff0c\u6807\u7b7e\u4ea4\u6362\u8def\u5f84<\/span><\/code>LSR\uff1aLabel Switching Router\uff0c\u6807\u7b7e\u4ea4\u6362\u8def\u7531\u5668<\/span><\/code>MPLS\uff1aMultiProtocol Label Switching\uff0c\u591a\u534f\u8bae\u6807\u7b7e\u4ea4\u6362<\/span><\/code>NHLFE\uff1aNext Hop Label Forwarding Entry\uff0c\u4e0b\u4e00\u8df3\u6807\u7b7e\u8f6c\u53d1\u6761\u76ee<\/span><\/code>SVC\uff1aSwitched Virtual Circuit\uff0c\u4ea4\u6362\u865a\u7535\u8def<\/span><\/code>SVP\uff1aSwitched Virtual Path\uff0c\u4ea4\u6362\u865a\u62df\u8def\u5f84<\/span><\/code>TTL\uff1aTime-To-Live\uff0c\u751f\u5b58\u65f6\u95f4<\/span><\/code>VC\uff1aVirtual Circuit\uff0c\u865a\u7535\u8def<\/span><\/code>VCI\uff1aVirtual Circuit Identifier\uff0c\u865a\u7535\u8def\u6807\u8bc6\u7b26<\/span><\/code>VP\uff1aVirtual Path\uff0c\u865a\u62df\u8def\u5f84<\/span><\/code>VPI\uff1aVirtual Path Identifier\uff0c\u865a\u62df\u8def\u5f84\u6807\u8bc6\u7b26<\/span><\/code><\/pre>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    2.4\u3001 \u81f4\u8c22<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u6587\u6863\u4e2d\u7684\u60f3\u6cd5\u548c\u6587\u672c\u662f\u4ece\u8bb8\u591a\u6765\u6e90\u548c\u6536\u5230\u7684\u8bc4\u8bba\u4e2d\u6536\u96c6\u7684\u3002\u6211\u4eec\u8981\u611f\u8c22 Rick Boivie\u3001Paul Doolan\u3001Nancy Feldman\u3001Yakov Rekhter\u3001Vijay Srinivasan \u548c George Swallow \u7684\u6295\u5165\u548c\u60f3\u6cd5\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3\u3001 MPLS \u57fa\u7840<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u672c\u8282\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd MPLS \u7684\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u5e76\u63cf\u8ff0\u8981\u4f7f\u7528\u7684\u4e00\u822c\u65b9\u6cd5\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.1\u3001 \u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u662f\u4e00\u4e2a\u77ed\u7684\u3001\u56fa\u5b9a\u957f\u5ea6\u7684\u3001\u672c\u5730\u6709\u6548\u7684\u6807\u8bc6\u7b26\uff0c\u7528\u4e8e\u8bc6\u522b FEC\u3002\u653e\u7f6e\u5728\u7279\u5b9a\u6570\u636e\u5305\u4e0a\u7684\u6807\u7b7e\u8868\u793a\u8be5\u6570\u636e\u5305\u88ab\u5206\u914d\u5230\u7684\u8f6c\u53d1\u7b49\u6548\u7c7b\u3002<\/p>\n
    \u6700\u5e38\u89c1\u7684\u662f\uff0c\u6570\u636e\u5305\u6839\u636e\uff08\u5b8c\u5168\u6216\u90e8\u5206\uff09\u5176\u7f51\u7edc\u5c42\u76ee\u6807\u5730\u5740\u5206\u914d\u7ed9 FEC\u3002\u4f46\u662f\uff0c\u6807\u7b7e\u6c38\u8fdc\u4e0d\u662f\u8be5\u5730\u5740\u7684\u7f16\u7801\u3002<\/p>\n
    \u5982\u679c Ru \u548c Rd \u662f LSR\uff0c\u4ed6\u4eec\u53ef\u80fd\u4f1a\u540c\u610f\uff0c\u5f53 Ru \u5411 Rd \u53d1\u9001\u6570\u636e\u5305\u65f6\uff0c\u5f53\u4e14\u4ec5\u5f53\u6570\u636e\u5305\u662f\u7279\u5b9a FEC F \u7684\u6210\u5458\u65f6\uff0cRu \u5c06\u4f7f\u7528\u6807\u7b7e\u503c\u4e3a L \u7684\u6570\u636e\u5305\u8fdb\u884c\u6807\u8bb0\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4ed6\u4eec\u53ef\u4ee5\u540c\u610f\u5bf9\u4e8e\u4ece Ru \u79fb\u52a8\u5230 Rd \u7684\u6570\u636e\u5305\uff0c\u6807\u7b7e L \u548c FEC F \u4e4b\u95f4\u7684\u201c\u7ed1\u5b9a\u201d\u3002\u7531\u4e8e\u8fd9\u6837\u7684\u7ea6\u5b9a\uff0cL \u6210\u4e3a Ru \u4ee3\u8868 FEC F \u7684\u201c\u4f20\u51fa\u6807\u7b7e\u201d\uff0c\u800c L \u6210\u4e3a Rd \u4ee3\u8868 FEC F \u7684\u201c\u4f20\u5165\u6807\u7b7e\u201d\u3002<\/p>\n
    \u8bf7\u6ce8\u610f\uff0c\u9664\u4e86\u4ece Ru \u53d1\u9001\u5230 Rd \u7684\u6570\u636e\u5305\u4e4b\u5916\uff0cL \u4e0d\u4e00\u5b9a\u4ee3\u8868\u4efb\u4f55\u6570\u636e\u5305\u7684 FEC F\u3002 L \u662f\u4e00\u4e2a\u4efb\u610f\u503c\uff0c\u5b83\u4e0e F \u7684\u7ed1\u5b9a\u5bf9\u4e8e Ru \u548c Rd \u6765\u8bf4\u662f\u5c40\u90e8\u7684\u3002<\/p>\n
    \u5f53\u6211\u4eec\u5728\u4e0a\u9762\u8c08\u5230\u4ece Ru\u201c\u53d1\u9001\u201d\u5230 Rd \u7684\u6570\u636e\u5305\u65f6\uff0c\u6211\u4eec\u5e76\u4e0d\u6697\u793a\u6570\u636e\u5305\u8d77\u6e90\u4e8e Ru \u6216\u5b83\u7684\u76ee\u7684\u5730\u662f Rd\u3002\u76f8\u53cd\uff0c\u6211\u4eec\u7684\u610f\u601d\u662f\u5305\u62ec\u5728\u4e00\u4e2a\u6216\u4e24\u4e2a LSR \u5904\u662f\u201c\u4f20\u8f93\u6570\u636e\u5305\u201d\u7684\u6570\u636e\u5305\u3002<\/p>\n
    \u6709\u65f6\uff0cRd \u53ef\u80fd\u5f88\u96be\u751a\u81f3\u4e0d\u53ef\u80fd\u544a\u8bc9\u5230\u8fbe\u7684\u5e26\u6709\u6807\u7b7e L \u7684\u6570\u636e\u5305\uff0c\u6807\u7b7e L \u662f\u7531 Ru \u653e\u7f6e\u5728\u6570\u636e\u5305\u4e2d\u7684\uff0c\u800c\u4e0d\u662f\u7531\u5176\u4ed6\u67d0\u4e2a LSR \u653e\u7f6e\u7684\u3002 \uff08\u5f53 Ru \u548c Rd \u4e0d\u662f\u76f4\u63a5\u90bb\u5c45\u65f6\uff0c\u901a\u5e38\u5c31\u662f\u8fd9\u79cd\u60c5\u51b5\u3002\uff09\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cRd \u5fc5\u987b\u786e\u4fdd\u4ece\u6807\u7b7e\u5230 FEC \u7684\u7ed1\u5b9a\u662f\u4e00\u5bf9\u4e00\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cRd \u5fc5\u987b\u4e0d\u540c\u610f Ru1 \u5c06 L \u7ed1\u5b9a\u5230 FEC F1\uff0c\u540c\u65f6\u4e5f\u540c\u610f\u5176\u4ed6\u4e00\u4e9b LSR Ru2 \u5c06 L \u7ed1\u5b9a\u5230\u4e0d\u540c\u7684 FEC F2\uff0c\u9664\u975e Rd \u603b\u662f\u53ef\u4ee5\u544a\u8bc9\uff0c\u5f53\u5b83\u6536\u5230\u5e26\u6709\u4f20\u5165\u6807\u7b7e L \u7684\u6570\u636e\u5305\u65f6\uff0c\u6807\u7b7e\u662f\u7531Ru1 \u8d34\u5728\u6570\u636e\u5305\u4e0a\u8fd8\u662f\u7531Ru2 \u8d34\u4e0a\u3002<\/p>\n
    \u6bcf\u4e2a LSR \u90fd\u6709\u8d23\u4efb\u786e\u4fdd\u5b83\u53ef\u4ee5\u552f\u4e00\u5730\u89e3\u91ca\u5176\u4f20\u5165\u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.2\u3001 \u4e0a\u6e38\u548c\u4e0b\u6e38 LSR<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe Ru \u548c Rd \u540c\u610f\u5c06\u6807\u7b7e L \u7ed1\u5b9a\u5230 FEC F\uff0c\u7528\u4e8e\u4ece Ru \u53d1\u9001\u5230 Rd \u7684\u6570\u636e\u5305\u3002\u90a3\u4e48\u5bf9\u4e8e\u8fd9\u4e2a\u7ed1\u5b9a\uff0cRu\u662f\u201c\u4e0a\u6e38LSR\u201d\uff0cRd\u662f\u201c\u4e0b\u6e38LSR\u201d\u3002<\/h2>\n
    \u5c31\u7ed9\u5b9a\u7684\u7ed1\u5b9a\u800c\u8a00\uff0c\u4e00\u4e2a\u8282\u70b9\u5728\u4e0a\u6e38\uff0c\u4e00\u4e2a\u5728\u4e0b\u6e38\uff0c\u4ec5\u610f\u5473\u7740\u7279\u5b9a\u6807\u7b7e\u8868\u793a\u4ece\u4e0a\u6e38\u8282\u70b9\u4f20\u8f93\u5230\u4e0b\u6e38\u8282\u70b9\u7684\u6570\u636e\u5305\u4e2d\u7684\u7279\u5b9a FEC\u3002\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u8be5 FEC \u4e2d\u7684\u6570\u636e\u5305\u5b9e\u9645\u4e0a\u4f1a\u4ece\u4e0a\u6e38\u8282\u70b9\u8def\u7531\u5230\u4e0b\u6e38\u8282\u70b9\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.3\u3001 \u6807\u8bb0\u5305<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u201c\u6807\u8bb0\u5305\u201d\u662f\u6807\u7b7e\u5df2\u88ab\u7f16\u7801\u5230\u5176\u4e2d\u7684\u5305\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6807\u7b7e\u9a7b\u7559\u5728\u4e13\u95e8\u4e3a\u6b64\u76ee\u7684\u800c\u5b58\u5728\u7684\u5c01\u88c5\u6807\u5934\u4e2d\u3002\u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u6807\u7b7e\u53ef\u4ee5\u9a7b\u7559\u5728\u73b0\u6709\u7684\u6570\u636e\u94fe\u8def\u6216\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u4e2d\uff0c\u53ea\u8981\u5b58\u5728\u53ef\u7528\u4e8e\u8be5\u76ee\u7684\u7684\u5b57\u6bb5\u5373\u53ef\u3002\u8981\u4f7f\u7528\u7684\u7279\u5b9a\u7f16\u7801\u6280\u672f\u5fc5\u987b\u5f97\u5230\u5bf9\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\u7684\u5b9e\u4f53\u548c\u5bf9\u6807\u7b7e\u8fdb\u884c\u89e3\u7801\u7684\u5b9e\u4f53\u53cc\u65b9\u540c\u610f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.4\u3001 \u6807\u7b7e\u5206\u914d\u548c\u5206\u53d1<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728 MPLS \u67b6\u6784\u4e2d\uff0c\u5c06\u7279\u5b9a\u6807\u7b7e L \u7ed1\u5b9a\u5230\u7279\u5b9a FEC F \u7684\u51b3\u5b9a\u662f\u7531 LSR \u505a\u51fa\u7684\uff0cLSR \u662f\u4e0e\u8be5\u7ed1\u5b9a\u76f8\u5173\u7684\u4e0b\u6e38\u3002\u4e0b\u6e38 LSR \u7136\u540e\u5c06\u7ed1\u5b9a\u901a\u77e5\u4e0a\u6e38 LSR\u3002\u56e0\u6b64\u6807\u7b7e\u662f\u201c\u4e0b\u6e38\u5206\u914d\u7684\u201d\uff0c\u6807\u7b7e\u7ed1\u5b9a\u5206\u5e03\u5728\u201c\u4e0b\u6e38\u5230\u4e0a\u6e38\u201d\u7684\u65b9\u5411\u3002<\/p>\n
    \u5982\u679c\u4e00\u4e2a LSR \u88ab\u8bbe\u8ba1\u6210\u53ea\u80fd\u67e5\u627e\u843d\u5165\u67d0\u4e2a\u6570\u5b57\u8303\u56f4\u5185\u7684\u6807\u7b7e\uff0c\u90a3\u4e48\u5b83\u53ea\u9700\u8981\u786e\u4fdd\u5b83\u53ea\u7ed1\u5b9a\u5728\u8be5\u8303\u56f4\u5185\u7684\u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.5\u3001 \u6807\u7b7e\u7ed1\u5b9a\u7684\u5c5e\u6027<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7531 Rd \u5206\u53d1\u5230 Ru \u7684\u6807\u7b7e L \u5230 FEC F \u7684\u7279\u5b9a\u7ed1\u5b9a\u53ef\u80fd\u5177\u6709\u5173\u8054\u7684\u201c\u5c5e\u6027\u201d\u3002\u5982\u679c\u4f5c\u4e3a\u4e0b\u6e38 LSR \u7684 Ru \u4e5f\u5206\u53d1\u4e00\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230 FEC F\uff0c\u90a3\u4e48\u5728\u67d0\u4e9b\u6761\u4ef6\u4e0b\uff0c\u5b83\u53ef\u80fd\u8fd8\u9700\u8981\u5206\u53d1\u5b83\u4ece Rd \u63a5\u6536\u5230\u7684\u76f8\u5e94\u5c5e\u6027\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.6\u3001 \u6807\u7b7e\u5206\u53d1\u534f\u8bae<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u5206\u53d1\u534f\u8bae\u662f\u4e00\u7ec4\u8fc7\u7a0b\uff0c\u4e00\u4e2a LSR \u901a\u8fc7\u8fd9\u4e9b\u8fc7\u7a0b\u901a\u77e5\u53e6\u4e00\u4e2a\u5b83\u6240\u505a\u7684\u6807\u7b7e\/FEC \u7ed1\u5b9a\u3002\u4f7f\u7528\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6765\u4ea4\u6362\u6807\u7b7e\/FEC \u7ed1\u5b9a\u4fe1\u606f\u7684\u4e24\u4e2a LSR \u5c31\u5b83\u4eec\u4ea4\u6362\u7684\u7ed1\u5b9a\u4fe1\u606f\u800c\u8a00\u88ab\u79f0\u4e3a\u201c\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u201d\u3002\u5982\u679c\u4e24\u4e2a LSR \u662f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u6211\u4eec\u5c06\u8bf4\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u201c\u6807\u7b7e\u5206\u53d1\u90bb\u63a5\u201d\u3002<\/p>\n
    \uff08\u6ce8\u610f\uff1a\u4e24\u4e2a LSR \u53ef\u80fd\u662f\u5173\u4e8e\u67d0\u4e9b\u7ed1\u5b9a\u96c6\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u70b9\uff0c\u4f46\u4e0d\u662f\u5173\u4e8e\u5176\u4ed6\u4e00\u4e9b\u7ed1\u5b9a\u96c6\u3002\uff09<\/p>\n
    \u6807\u7b7e\u5206\u53d1\u534f\u8bae\u8fd8\u5305\u62ec\u4e24\u4e2a\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u4e3a\u4e86\u4e86\u89e3\u5f7c\u6b64\u7684 MPLS \u529f\u80fd\u800c\u9700\u8981\u53c2\u4e0e\u7684\u4efb\u4f55\u534f\u5546\u3002<\/p>\n
    \u4f53\u7cfb\u7ed3\u6784\u4e0d\u5047\u5b9a\u53ea\u6709\u4e00\u4e2a\u5355\u4e00\u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u3002\u4e8b\u5b9e\u4e0a\uff0c\u8bb8\u591a\u4e0d\u540c\u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6b63\u5728\u6807\u51c6\u5316\u3002\u73b0\u6709\u534f\u8bae\u5df2\u7ecf\u6269\u5c55\uff0c\u4ee5\u4fbf\u6807\u7b7e\u5206\u53d1\u53ef\u4ee5\u642d\u8f7d\u5728\u5b83\u4eec\u4e0a\uff08\u53c2\u89c1\uff0c\u4f8b\u5982\uff0c[MPLS-BGP]\u3001[MPLS-RSVP-TUNNELS]\uff09\u3002\u8fd8\u4e3a\u5206\u53d1\u6807\u7b7e\u7684\u660e\u786e\u76ee\u7684\u5b9a\u4e49\u4e86\u65b0\u534f\u8bae\uff08\u53c2\u89c1\uff0c\u4f8b\u5982\uff0c[MPLS-LDP]\u3001[MPLS-CR-LDP]\u3002<\/p>\n
    \u5728\u672c\u6587\u6863\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u9996\u5b57\u6bcd\u7f29\u5199\u8bcd\u201cLDP\u201d\u6765\u7279\u6307[MPLS-LDP]\u4e2d\u5b9a\u4e49\u7684\u534f\u8bae\uff1b\u5f53\u8c08\u5230\u4e00\u822c\u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u65f6\uff0c\u6211\u4eec\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u9996\u5b57\u6bcd\u7f29\u7565\u8bcd\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.7\u3001 \u4e3b\u52a8\u63d0\u4f9b\u7684\u4e0b\u6e38\u4e0e\u6309\u9700\u4e0b\u6e38<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    MPLS \u4f53\u7cfb\u7ed3\u6784\u5141\u8bb8 LSR \u4ece\u5176\u9488\u5bf9\u7279\u5b9a FEC \u7684\u4e0b\u4e00\u8df3\u660e\u786e\u8bf7\u6c42\u8be5 FEC \u7684\u6807\u7b7e\u7ed1\u5b9a\u3002\u8fd9\u79f0\u4e3a\u201c\u4e0b\u6e38\u6309\u9700\u201d\u6807\u7b7e\u5206\u53d1\u3002<\/p>\n
    MPLS \u4f53\u7cfb\u7ed3\u6784\u8fd8\u5141\u8bb8 LSR \u5c06\u7ed1\u5b9a\u5206\u53d1\u5230\u672a\u660e\u786e\u8bf7\u6c42\u5b83\u4eec\u7684 LSR\u3002\u8fd9\u79f0\u4e3a\u201c\u672a\u7ecf\u8bf7\u6c42\u7684\u4e0b\u6e38\u201d\u6807\u7b7e\u5206\u53d1\u3002<\/p>\n
    \u9884\u8ba1\u67d0\u4e9b MPLS \u5b9e\u73b0\u5c06\u4ec5\u63d0\u4f9b\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u800c\u67d0\u4e9b\u5c06\u4ec5\u63d0\u4f9b\u4e3b\u52a8\u63d0\u4f9b\u7684\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\uff0c\u800c\u67d0\u4e9b\u5c06\u540c\u65f6\u63d0\u4f9b\u4e24\u8005\u3002\u63d0\u4f9b\u54ea\u4e2a\u53ef\u80fd\u53d6\u51b3\u4e8e\u7279\u5b9a\u5b9e\u73b0\u6240\u652f\u6301\u7684\u63a5\u53e3\u7684\u7279\u6027\u3002\u7136\u800c\uff0c\u8fd9\u4e24\u79cd\u6807\u7b7e\u5206\u53d1\u6280\u672f\u53ef\u4ee5\u540c\u65f6\u5728\u540c\u4e00\u7f51\u7edc\u4e2d\u4f7f\u7528\u3002\u5728\u4efb\u4f55\u7ed9\u5b9a\u7684\u6807\u7b7e\u5206\u914d\u90bb\u63a5\u4e0a\uff0c\u4e0a\u6e38 LSR \u548c\u4e0b\u6e38 LSR \u5fc5\u987b\u5c31\u4f7f\u7528\u54ea\u79cd\u6280\u672f\u8fbe\u6210\u4e00\u81f4\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.8\u3001 \u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    LSR Ru \u53ef\u4ee5\u4ece LSR Rd \u63a5\u6536\uff08\u6216\u5df2\u7ecf\u63a5\u6536\uff09\u9488\u5bf9\u7279\u5b9a FEC \u7684\u6807\u7b7e\u7ed1\u5b9a\uff0c\u5373\u4f7f Rd \u4e0d\u662f\u8be5 FEC \u7684 Ru \u7684\u4e0b\u4e00\u8df3\uff08\u6216\u4e0d\u518d\u662f Ru \u7684\u4e0b\u4e00\u8df3\uff09\u3002<\/p>\n
    \u7136\u540e Ru \u53ef\u4ee5\u9009\u62e9\u662f\u8ddf\u8e2a\u6b64\u7c7b\u7ed1\u5b9a\uff0c\u8fd8\u662f\u4e22\u5f03\u6b64\u7c7b\u7ed1\u5b9a\u3002\u5982\u679c Ru \u8ddf\u8e2a\u6b64\u7c7b\u7ed1\u5b9a\uff0c\u5219\u5982\u679c Rd \u6700\u7ec8\u6210\u4e3a\u5176\u9488\u5bf9\u6240\u8ba8\u8bba\u7684 FEC \u7684\u4e0b\u4e00\u8df3\uff0c\u5219\u5b83\u53ef\u80fd\u4f1a\u7acb\u5373\u518d\u6b21\u5f00\u59cb\u4f7f\u7528\u8be5\u7ed1\u5b9a\u3002\u5982\u679c Ru \u4e22\u5f03\u8fd9\u6837\u7684\u7ed1\u5b9a\uff0c\u90a3\u4e48\u5982\u679c Rd \u7a0d\u540e\u6210\u4e3a\u4e0b\u4e00\u8df3\uff0c\u5219\u5fc5\u987b\u91cd\u65b0\u83b7\u53d6\u7ed1\u5b9a\u3002<\/p>\n
    \u5982\u679c LSR \u652f\u6301\u201c\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u201d\uff0c\u5b83\u4f1a\u7ef4\u62a4\u4ece\u4e0d\u662f\u8be5 FEC \u4e0b\u4e00\u8df3\u7684 LSR \u63a5\u6536\u5230\u7684\u6807\u7b7e\u548c FEC \u4e4b\u95f4\u7684\u7ed1\u5b9a\u3002\u5982\u679c LSR \u652f\u6301\u201c\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u201d\uff0c\u5b83\u4f1a\u4e22\u5f03\u6b64\u7c7b\u7ed1\u5b9a\u3002<\/p>\n
    \u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u5141\u8bb8\u66f4\u5feb\u5730\u9002\u5e94\u8def\u7531\u66f4\u6539\uff0c\u4f46\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u867d\u7136\u9700\u8981 LSR \u6765\u7ef4\u62a4\u66f4\u5c11\u7684\u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.9\u3001 \u6807\u7b7e\u6808<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u5df2\u7ecf\u8bf4\u5f97\u597d\u50cf\u4e00\u4e2a\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u53ea\u5e26\u6709\u4e00\u4e2a\u6807\u7b7e\u3002\u6b63\u5982\u6211\u4eec\u5c06\u770b\u5230\u7684\uff0c\u62e5\u6709\u4e00\u4e2a\u66f4\u901a\u7528\u7684\u6a21\u578b\u662f\u5f88\u6709\u7528\u7684\uff0c\u5728\u8fd9\u4e2a\u6a21\u578b\u4e2d\uff0c\u4e00\u4e2a\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u643a\u5e26\u8bb8\u591a\u6807\u7b7e\uff0c\u7ec4\u7ec7\u4e3a\u540e\u8fdb\u5148\u51fa\u5806\u6808\u3002\u6211\u4eec\u5c06\u5176\u79f0\u4e3a\u201c\u6807\u7b7e\u5806\u6808\u201d\u3002<\/p>\n
    \u867d\u7136\uff0c\u6b63\u5982\u6211\u4eec\u5c06\u770b\u5230\u7684\uff0cMPLS \u652f\u6301\u5c42\u6b21\u7ed3\u6784\uff0c\u4f46\u6807\u8bb0\u6570\u636e\u5305\u7684\u5904\u7406\u5b8c\u5168\u72ec\u7acb\u4e8e\u5c42\u6b21\u7ed3\u6784\u3002\u5904\u7406\u603b\u662f\u57fa\u4e8e\u9876\u90e8\u6807\u7b7e\uff0c\u4e0d\u8003\u8651\u67d0\u4e9b\u6570\u91cf\u7684\u5176\u4ed6\u6807\u7b7e\u8fc7\u53bb\u53ef\u80fd\u5df2\u7ecf\u201c\u9ad8\u4e8e\u5b83\u201d\uff0c\u6216\u8005\u76ee\u524d\u67d0\u4e9b\u6570\u91cf\u7684\u5176\u4ed6\u6807\u7b7e\u53ef\u80fd\u4f4e\u4e8e\u5b83\u7684\u53ef\u80fd\u6027\u3002<\/p>\n
    \u4e00\u4e2a\u672a\u6807\u8bb0\u7684\u6570\u636e\u5305\u53ef\u4ee5\u88ab\u8ba4\u4e3a\u662f\u4e00\u4e2a\u6807\u7b7e\u6808\u4e3a\u7a7a\u7684\u6570\u636e\u5305\uff08\u5373\uff0c\u5176\u6807\u7b7e\u6808\u7684\u6df1\u5ea6\u4e3a 0\uff09\u3002<\/p>\n
    \u5982\u679c\u4e00\u4e2a\u6570\u636e\u5305\u7684\u6807\u7b7e\u6808\u7684\u6df1\u5ea6\u4e3a m\uff0c\u6211\u4eec\u5c06\u6808\u5e95\u7684\u6807\u7b7e\u79f0\u4e3a 1 \u7ea7\u6807\u7b7e\uff0c\u5c06\u5176\u4e0a\u65b9\u7684\u6807\u7b7e\uff08\u5982\u679c\u5b58\u5728\uff09\u79f0\u4e3a 2 \u7ea7\u6807\u7b7e\uff0c\u5c06\u9876\u90e8\u7684\u6807\u7b7e\u79f0\u4e3a\u5806\u6808\u4f5c\u4e3a\u7b2c m \u7ea7\u6807\u7b7e\u3002<\/p>\n
    \u5f53\u6211\u4eec\u5f15\u5165 LSP \u96a7\u9053\u548c MPLS \u5c42\u6b21\u7ed3\u6784\u7684\u6982\u5ff5\uff08\u7b2c 3.27 \u8282\uff09\u65f6\uff0c\u6807\u7b7e\u5806\u6808\u7684\u6548\u7528\u5c06\u53d8\u5f97\u6e05\u6670\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.10\u3001 \u4e0b\u4e00\u8df3\u6807\u7b7e\u8f6c\u53d1\u6761\u76ee (NHLFE)<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u201c\u4e0b\u4e00\u8df3\u6807\u7b7e\u8f6c\u53d1\u6761\u76ee\u201d(Next Hop Label Forwarding Entry\uff0cNHLFE) <\/strong>\u7528\u4e8e\u8f6c\u53d1\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u3002\u5b83\u5305\u542b\u4ee5\u4e0b\u4fe1\u606f\uff1a<\/p>\n
    1. \u6570\u636e\u5305\u7684\u4e0b\u4e00\u8df3<\/p>\n
    2. \u5bf9\u6570\u636e\u5305\u7684\u6807\u7b7e\u6808\u6267\u884c\u7684\u64cd\u4f5c\uff1b\u8fd9\u662f\u4ee5\u4e0b\u64cd\u4f5c\u4e4b\u4e00\uff1a<\/p>\n
    \n
    a) \u7528\u6307\u5b9a\u7684\u65b0\u6807\u7b7e\u66ff\u6362\u6807\u7b7e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e<\/strong><\/p>\n
    b) \u5f39\u51fa\u6807\u7b7e\u6808<\/strong><\/p>\n
    c) \u7528\u6307\u5b9a\u7684\u65b0\u6807\u7b7e\u66ff\u6362\u6807\u7b7e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\uff0c\u7136\u540e\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u6307\u5b9a\u7684\u65b0\u6807\u7b7e\u538b\u5165\u6807\u7b7e\u5806\u6808\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u5b83\u8fd8\u53ef\u80fd\u5305\u542b\uff1a<\/p>\n
    \n
    d) \u4f20\u8f93\u6570\u636e\u5305\u65f6\u4f7f\u7528\u7684\u6570\u636e\u94fe\u8def\u5c01\u88c5<\/strong><\/p>\n
    e) \u4f20\u8f93\u6570\u636e\u5305\u65f6\u5bf9\u6807\u7b7e\u6808\u8fdb\u884c\u7f16\u7801\u7684\u65b9\u5f0f<\/strong><\/p>\n
    f) \u6b63\u786e\u5904\u7406\u6570\u636e\u5305\u6240\u9700\u7684\u4efb\u4f55\u5176\u4ed6\u4fe1\u606f\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u8bf7\u6ce8\u610f\uff0c\u5728\u7ed9\u5b9a\u7684 LSR \u4e0a\uff0c\u6570\u636e\u5305\u7684\u201c\u4e0b\u4e00\u8df3\u201d\u53ef\u80fd\u662f\u8be5 LSR \u672c\u8eab\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cLSR \u9700\u8981\u5f39\u51fa\u9876\u7ea7\u6807\u7b7e\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u6570\u636e\u5305\u201c\u8f6c\u53d1\u201d\u7ed9\u81ea\u5df1\u3002\u7136\u540e\u5b83\u4f1a\u6839\u636e\u5f39\u51fa\u5806\u53e0\u7684\u6807\u7b7e\u540e\u5269\u4f59\u7684\u5185\u5bb9\u505a\u51fa\u53e6\u4e00\u4e2a\u8f6c\u53d1\u51b3\u5b9a\u3002\u8fd9\u53ef\u80fd\u4ecd\u7136\u662f\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\uff0c\u4e5f\u53ef\u80fd\u662f\u672c\u673a IP \u6570\u636e\u5305\u3002<\/p>\n
    \u8fd9\u610f\u5473\u7740\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cLSR \u53ef\u80fd\u9700\u8981\u5bf9 IP \u62a5\u6587\u5934\u8fdb\u884c\u64cd\u4f5c\u4ee5\u8f6c\u53d1\u6570\u636e\u5305\u3002<\/p>\n
    \u5982\u679c\u6570\u636e\u5305\u7684\u201c\u4e0b\u4e00\u8df3\u201d\u662f\u5f53\u524d LSR\uff0c\u90a3\u4e48\u6807\u7b7e\u6808\u64cd\u4f5c\u5fc5\u987b\u662f\u201c\u5f39\u51fa\u6808\u201d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.11\u3001 \u4f20\u5165\u6807\u7b7e\u6620\u5c04 (ILM)<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u201c\u4f20\u5165\u6807\u7b7e\u6620\u5c04\u201d(Incoming Label Map\uff0cILM) <\/strong>\u5c06\u6bcf\u4e2a\u4f20\u5165\u6807\u7b7e\u6620\u5c04\u5230\u4e00\u7ec4 NHLFE\u3002\u5b83\u7528\u4e8e\u8f6c\u53d1\u4f5c\u4e3a\u6807\u8bb0\u6570\u636e\u5305\u5230\u8fbe\u7684\u6570\u636e\u5305\u3002<\/p>\n
    \u5982\u679c ILM \u5c06\u7279\u5b9a\u6807\u7b7e\u6620\u5c04\u5230\u5305\u542b\u591a\u4e2a\u5143\u7d20\u7684\u4e00\u7ec4 NHLFE\uff0c\u5219\u5fc5\u987b\u5728\u8f6c\u53d1\u6570\u636e\u5305\u4e4b\u524d\u9009\u62e9\u8be5\u7ec4\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20\u3002\u4ece\u96c6\u5408\u4e2d\u9009\u62e9\u5143\u7d20\u7684\u8fc7\u7a0b\u8d85\u51fa\u4e86\u672c\u6587\u6863\u7684\u8303\u56f4\u3002\u8ba9 ILM \u5c06\u6807\u7b7e\u6620\u5c04\u5230\u5305\u542b\u591a\u4e2a NHLFE \u7684\u96c6\u5408\u53ef\u80fd\u5f88\u6709\u7528\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u9700\u8981\u5728\u591a\u4e2a\u7b49\u6210\u672c\u8def\u5f84\u4e0a\u8fdb\u884c\u8d1f\u8f7d\u5e73\u8861\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.12\u3001 FEC \u5230 NHLFE \u6620\u5c04 (FTN)<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u201cFEC \u5230 NHLFE\u201d\uff08FTN\uff09<\/strong>\u5c06\u6bcf\u4e2a FEC \u6620\u5c04\u5230\u4e00\u7ec4 NHLFE\u3002\u5b83\u7528\u4e8e\u8f6c\u53d1\u672a\u6807\u8bb0\u5230\u8fbe\u4f46\u5728\u8f6c\u53d1\u524d\u8981\u6807\u8bb0\u7684\u6570\u636e\u5305\u3002<\/p>\n
    \u5982\u679c FTN \u5c06\u7279\u5b9a\u6807\u7b7e\u6620\u5c04\u5230\u5305\u542b\u591a\u4e2a\u5143\u7d20\u7684\u4e00\u7ec4 NHLFE\uff0c\u5219\u5728\u8f6c\u53d1\u6570\u636e\u5305\u4e4b\u524d\u5fc5\u987b\u9009\u62e9\u8be5\u7ec4\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20\u3002\u4ece\u96c6\u5408\u4e2d\u9009\u62e9\u5143\u7d20\u7684\u8fc7\u7a0b\u8d85\u51fa\u4e86\u672c\u6587\u6863\u7684\u8303\u56f4\u3002\u8ba9 FTN \u5c06\u6807\u7b7e\u6620\u5c04\u5230\u5305\u542b\u591a\u4e2a NHLFE \u7684\u96c6\u5408\u53ef\u80fd\u5f88\u6709\u7528\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u9700\u8981\u5728\u591a\u4e2a\u7b49\u6210\u672c\u8def\u5f84\u4e0a\u8fdb\u884c\u8d1f\u8f7d\u5e73\u8861\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.13\u3001 \u6807\u7b7e\u4ea4\u6362<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6807\u7b7e\u4ea4\u6362\u662f\u4f7f\u7528\u4ee5\u4e0b\u7a0b\u5e8f\u6765\u8f6c\u53d1\u6570\u636e\u5305\u3002<\/p>\n
    \u4e3a\u4e86\u8f6c\u53d1\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\uff0cLSR \u68c0\u67e5\u6807\u7b7e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u3002\u5b83\u4f7f\u7528 ILM \u5c06\u6b64\u6807\u7b7e\u6620\u5c04\u5230 NHLFE\u3002\u4f7f\u7528 NHLFE \u4e2d\u7684\u4fe1\u606f\uff0c\u5b83\u786e\u5b9a\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230\u4f55\u5904\uff0c\u5e76\u5bf9\u6570\u636e\u5305\u7684\u6807\u7b7e\u5806\u6808\u6267\u884c\u64cd\u4f5c\u3002\u7136\u540e\u5b83\u5c06\u65b0\u6807\u7b7e\u5806\u6808\u7f16\u7801\u5230\u6570\u636e\u5305\u4e2d\uff0c\u5e76\u8f6c\u53d1\u7ed3\u679c\u3002<\/p>\n
    \u4e3a\u4e86\u8f6c\u53d1\u672a\u6807\u8bb0\u7684\u6570\u636e\u5305\uff0cLSR \u4f1a\u5206\u6790\u7f51\u7edc\u5c42\u62a5\u6587\u5934\uff0c\u4ee5\u786e\u5b9a\u6570\u636e\u5305\u7684 FEC\u3002\u7136\u540e\u5b83\u4f7f\u7528 FTN \u5c06\u5176\u6620\u5c04\u5230 NHLFE\u3002\u4f7f\u7528 NHLFE \u4e2d\u7684\u4fe1\u606f\uff0c\u5b83\u786e\u5b9a\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230\u4f55\u5904\uff0c\u5e76\u5bf9\u6570\u636e\u5305\u7684\u6807\u7b7e\u5806\u6808\u6267\u884c\u64cd\u4f5c\u3002 \uff08\u5f53\u7136\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5f39\u51fa\u6807\u7b7e\u5806\u6808\u662f\u975e\u6cd5\u7684\u3002\uff09\u7136\u540e\u5b83\u5c06\u65b0\u6807\u7b7e\u5806\u6808\u7f16\u7801\u5230\u6570\u636e\u5305\u4e2d\uff0c\u5e76\u8f6c\u53d1\u7ed3\u679c\u3002<\/p>\n
    \u91cd\u8981\u7684\u662f\u8981\u6ce8\u610f\uff0c\u5728\u4f7f\u7528\u6807\u7b7e\u4ea4\u6362\u65f6\uff0c\u4e0b\u4e00\u8df3\u603b\u662f\u6765\u81ea NHLFE\uff1b\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u4e0d\u4f7f\u7528 MPLS\uff0c\u8fd9\u53ef\u80fd\u4e0e\u4e0b\u4e00\u8df3\u4e0d\u540c\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.14\u3001 \u6807\u7b7e\u7684\u8303\u56f4\u548c\u552f\u4e00\u6027<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7ed9\u5b9a\u7684 LSR Rd \u53ef\u4ee5\u5c06\u6807\u7b7e L1 \u7ed1\u5b9a\u5230 FEC F\uff0c\u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53 Ru1\u3002 Rd \u8fd8\u53ef\u4ee5\u5c06\u6807\u7b7e L2 \u7ed1\u5b9a\u5230 FEC F\uff0c\u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53 Ru2\u3002 L1 == L2 \u662f\u5426\u7531\u67b6\u6784\u51b3\u5b9a\uff1b\u8fd9\u662f\u672c\u5730\u7684\u4e8b\u60c5\u3002<\/p>\n
    \u7ed9\u5b9a\u7684 LSR Rd \u53ef\u4ee5\u5c06\u6807\u7b7e L \u7ed1\u5b9a\u5230 FEC F1\uff0c\u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53 Ru1\u3002 Rd \u8fd8\u53ef\u4ee5\u5c06\u6807\u7b7e L \u7ed1\u5b9a\u5230 FEC F2\uff0c\u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53 Ru2\u3002\u5982\u679c\uff08\u4e14\u4ec5\u5f53\uff09RD \u53ef\u4ee5\u5224\u65ad\uff0c\u5f53\u5b83\u6536\u5230\u9876\u90e8\u6807\u7b7e\u4e3a L \u7684\u6570\u636e\u5305\u65f6\uff0c\u6807\u7b7e\u662f\u7531 RU1 \u8fd8\u662f\u7531 RU2 \u653e\u7f6e\u5728\u90a3\u91cc\u7684\uff0c\u90a3\u4e48\u67b6\u6784\u4e0d\u8981\u6c42 F1 == F2\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u8bf4 Rd \u4e3a\u5176\u5206\u914d\u7ed9 Ru1 \u7684\u6807\u7b7e\u4f7f\u7528\u4e86\u4e0e\u5206\u914d\u7ed9 Ru2 \u7684\u6807\u7b7e\u4e0d\u540c\u7684\u201c\u6807\u7b7e\u7a7a\u95f4\u201d\u3002<\/p>\n
    \u4e00\u822c\u6765\u8bf4\uff0c\u5982\u679c\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\uff0cRd \u53ea\u80fd\u5224\u65ad\u662f Ru1 \u8fd8\u662f Ru2 \u5c06\u7279\u5b9a\u6807\u7b7e\u503c L \u653e\u5728\u6807\u7b7e\u5806\u6808\u7684\u9876\u90e8\uff1a<\/p>\n
    \n
    – Ru1 \u548c Ru2 \u662f Rd \u5411\u5176\u5206\u53d1\u6807\u7b7e\u503c L \u7684\u7ed1\u5b9a\u7684\u552f\u4e00\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u5e76\u4e14<\/strong><\/p>\n
    – Ru1 \u548c Ru2 \u5747\u901a\u8fc7\u70b9\u5bf9\u70b9\u63a5\u53e3\u76f4\u63a5\u8fde\u63a5\u5230 Rd\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u5f53\u8fd9\u4e9b\u6761\u4ef6\u6210\u7acb\u65f6\uff0cLSR \u53ef\u4ee5\u4f7f\u7528\u5177\u6709\u201c\u6bcf\u4e2a\u63a5\u53e3\u201d\u8303\u56f4\u7684\u6807\u7b7e\uff0c\u5373\u6bcf\u4e2a\u63a5\u53e3\u552f\u4e00\u7684\u6807\u7b7e\u3002\u6211\u4eec\u53ef\u4ee5\u8bf4 LSR \u6b63\u5728\u4f7f\u7528\u201c\u6bcf\u4e2a\u63a5\u53e3\u7684\u6807\u7b7e\u7a7a\u95f4\u201d\u3002\u5f53\u8fd9\u4e9b\u6761\u4ef6\u4e0d\u6210\u7acb\u65f6\uff0c\u6807\u7b7e\u5728\u5206\u914d\u5b83\u4eec\u7684 LSR \u4e0a\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u8bf4 LSR \u6b63\u5728\u4f7f\u7528\u201c\u6bcf\u4e2a\u5e73\u53f0\u7684\u6807\u7b7e\u7a7a\u95f4\u201d\u3002<\/p>\n
    \u5982\u679c\u7279\u5b9a\u7684 LSR Rd \u901a\u8fc7\u4e24\u4e2a\u70b9\u5bf9\u70b9\u63a5\u53e3\u8fde\u63a5\u5230\u7279\u5b9a\u7684 LSR Ru\uff0c\u5219 Rd \u53ef\u4ee5\u5411 Ru \u5206\u53d1\u6807\u7b7e L \u4e0e FEC F1 \u7684\u7ed1\u5b9a\uff0c\u4ee5\u53ca\u6807\u7b7e L \u4e0e FEC F2 \u7684\u7ed1\u5b9a\uff0cF1 != F2\uff0c\u5f53\u4e14\u4ec5\u5f53\u6bcf\u4e2a\u7ed1\u5b9a\u4ec5\u5bf9 Ru \u901a\u8fc7\u7279\u5b9a\u63a5\u53e3\u4e4b\u4e00\u53d1\u9001\u5230 Rd \u7684\u6570\u636e\u5305\u6709\u6548\u3002\u5728\u6240\u6709\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0cRd \u4e0d\u5f97\u5c06\u76f8\u540c\u6807\u7b7e\u503c\u7684 Ru \u7ed1\u5b9a\u5206\u53d1\u5230\u4e24\u4e2a\u4e0d\u540c\u7684 FEC\u3002<\/p>\n
    \u5373\u4f7f\u7ed1\u5b9a\u88ab\u89c6\u4e3a\u5904\u4e8e\u4e0d\u540c\u7684\u201c\u5c42\u6b21\u7ed3\u6784\u7ea7\u522b\u201d\uff0c\u8be5\u7981\u4ee4\u4ecd\u7136\u6709\u6548\u3002\u5728 MPLS \u4e2d\uff0c\u6ca1\u6709\u9488\u5bf9\u5c42\u6b21\u7ed3\u6784\u7684\u4e0d\u540c\u7ea7\u522b\u5177\u6709\u4e0d\u540c\u6807\u7b7e\u7a7a\u95f4\u7684\u6982\u5ff5\uff1b\u5728\u89e3\u91ca\u6807\u7b7e\u65f6\uff0c\u6807\u7b7e\u7684\u7ea7\u522b\u65e0\u5173\u7d27\u8981\u3002<\/p>\n
    \u95ee\u9898\u662f\u4e00\u4e2a LSR \u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2a per-platform \u6807\u7b7e\u7a7a\u95f4\uff0c\u6216\u8005\u4e3a\u540c\u4e00\u4e2a\u63a5\u53e3\u4f7f\u7528\u591a\u4e2a per-interface \u6807\u7b7e\u7a7a\u95f4\u3002\u8fd9\u4e0d\u662f\u67b6\u6784\u7981\u6b62\u7684\u3002\u7136\u800c\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cLSR \u5fc5\u987b\u6709\u4e00\u4e9b\u65b9\u6cd5\uff08\u67b6\u6784\u672a\u6307\u5b9a\uff09\u4e3a\u7279\u5b9a\u7684\u4f20\u5165\u6807\u7b7e\u786e\u5b9a\u8be5\u6807\u7b7e\u5c5e\u4e8e\u54ea\u4e2a\u6807\u7b7e\u7a7a\u95f4\u3002\u4f8b\u5982\uff0c[MPLS-SHIM] \u6307\u5b9a\u7528\u4e8e\u5355\u64ad\u6570\u636e\u5305\u7684\u6807\u7b7e\u7a7a\u95f4\u4e0e\u7528\u4e8e\u7ec4\u64ad\u6570\u636e\u5305\u7684\u6807\u7b7e\u7a7a\u95f4\u4e0d\u540c\uff0c\u5e76\u4f7f\u7528\u6570\u636e\u94fe\u8def\u5c42\u4ee3\u7801\u70b9\u6765\u533a\u5206\u8fd9\u4e24\u4e2a\u6807\u7b7e\u7a7a\u95f4\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.15\u3001 \u6807\u7b7e\u4ea4\u6362\u8def\u5f84 (LSP)\u3001LSP \u5165\u53e3\u3001LSP \u51fa\u53e3<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7279\u5b9a\u6570\u636e\u5305 P \u7684\u201c\u7ea7\u522b m \u6807\u7b7e\u4ea4\u6362\u8def\u5f84 (LSP)\u201d\u662f\u4e00\u7cfb\u5217\u8def\u7531\u5668\uff0c<\/p>\n
    \n
    <R1, ..., Rn><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u5177\u6709\u4ee5\u4e0b\u5c5e\u6027\uff1a<\/p>\n
    1. R1\uff0c\u5373\u201cLSP Ingress\u201d\uff0c\u662f\u4e00\u4e2aLSR\uff0c\u5b83\u5c06\u4e00\u4e2a\u6807\u7b7e\u538b\u5165P\u7684\u6807\u7b7e\u6808\uff0c\u5f97\u5230\u6df1\u5ea6\u4e3am\u7684\u6807\u7b7e\u6808\uff1b<\/strong><\/p>\n
    2. \u5bf9\u4e8e\u6240\u6709\u7684i\uff0c1<i<n\uff0cP\u5728\u88abLSR Ri\u63a5\u6536\u65f6\u6709\u4e00\u4e2a\u6df1\u5ea6\u4e3am\u7684\u6807\u7b7e\u6808\uff1b<\/strong><\/p>\n
    3. \u5728P\u4eceR1\u5230R[n-1]\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5b83\u7684\u6807\u7b7e\u6808\u7684\u6df1\u5ea6\u4ece\u6765\u6ca1\u6709\u5c0f\u4e8em\uff1b<\/strong><\/p>\n
    4. \u5bf9\u4e8e\u6240\u6709\u7684i\uff0c1<i<n\uff1aRi\u901a\u8fc7MPLS\u7684\u65b9\u5f0f\u5c06P\u4f20\u8f93\u7ed9R[i+1]\uff0c\u5373\u4f7f\u7528\u6807\u7b7e\u6808\u9876\u7684\u6807\u7b7e\uff08m\u7ea7\u6807\u7b7e\uff09\u4f5c\u4e3a\u7d22\u5f15ILM\uff1b<\/strong><\/p>\n
    5. \u5bf9\u4e8e\u6240\u6709 i\uff0c1<i<n\uff1a\u5982\u679c\u7cfb\u7edf S \u5728 Ri \u53d1\u9001 P \u4e4b\u540e\u4f46\u5728 R[i+1] \u63a5\u6536 P \u4e4b\u524d\u63a5\u6536\u5e76\u8f6c\u53d1 P\uff08\u4f8b\u5982\uff0cRi \u548c R[i+1] \u53ef\u80fd\u901a\u8fc7\u4ea4\u6362\u6570\u636e\u94fe\u8def\u5b50\u7f51\u8fde\u63a5\uff0c\u5e76\u4e14 S \u53ef\u80fd\u662f\u6570\u636e\u94fe\u8def\u4ea4\u6362\u673a\u4e4b\u4e00\uff09\uff0c\u90a3\u4e48 S \u7684\u8f6c\u53d1\u51b3\u7b56\u4e0d\u662f\u57fa\u4e8e m \u7ea7\u6807\u7b7e\uff0c\u4e5f\u4e0d\u662f\u57fa\u4e8e\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u3002<\/strong>\u8fd9\u53ef\u80fd\u662f\u56e0\u4e3a\uff1a<\/p>\n
    \n
    a) \u51b3\u7b56\u6839\u672c\u4e0d\u57fa\u4e8e\u6807\u7b7e\u6808\u6216\u7f51\u7edc\u5c42\u5934\uff1b<\/strong><\/p>\n
    b) \u8be5\u51b3\u5b9a\u57fa\u4e8e\u4e00\u4e2a\u6807\u7b7e\u5806\u6808\uff0c\u9644\u52a0\u6807\u7b7e\u5df2\u88ab\u538b\u5165\u5230\u8be5\u6807\u7b7e\u5806\u6808\u4e0a\uff08\u5373\uff0c\u5728\u7ea7\u522b m+k \u6807\u7b7e\u4e0a\uff0c\u5176\u4e2d k>0\uff09\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u6362\u53e5\u8bdd\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u636e\u5305 P \u7684 m \u7ea7 LSP \u79f0\u4e3a\u8def\u7531\u5668\u5e8f\u5217\uff1a<\/p>\n
    1. \u4ee5\u4e00\u4e2a LSR\uff08\u4e00\u4e2a\u201cLSP Ingress\u201d\uff09\u5f00\u59cb\uff0c\u5b83\u538b\u5165\u4e00\u4e2a\u7ea7\u522b m \u7684\u6807\u7b7e\uff0c<\/strong><\/p>\n
    2. \u5176\u6240\u6709\u4e2d\u95f4 LSR \u901a\u8fc7\u5728 m \u7ea7\u6807\u7b7e\u4e0a\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\u6765\u505a\u51fa\u8f6c\u53d1\u51b3\u7b56\uff0c<\/strong><\/p>\n
    3. \u5f53\u8f6c\u53d1\u51b3\u5b9a\u662f\u7531 m-k \u7ea7\u6807\u7b7e\u4e0a\u7684\u6807\u7b7e\u4ea4\u6362\u505a\u51fa\u7684\u8f6c\u53d1\u51b3\u5b9a\u65f6\uff0c\u5b83\u7ed3\u675f\uff08\u5728\u201cLSP \u51fa\u53e3\u201d\uff09\uff0c\u5176\u4e2d k>0\uff0c\u6216\u8005\u5f53\u8f6c\u53d1\u51b3\u5b9a\u662f\u7531\u201c\u666e\u901a\u201d\u975e MPLS \u8f6c\u53d1\u7a0b\u5e8f\u505a\u51fa\u65f6\u3002<\/strong><\/p>\n
    \u8fd9\u6837\u505a\u7684\u7ed3\u679c\uff08\u6216\u8005\u53ef\u80fd\u662f\u4e00\u4e2a\u5047\u8bbe\uff09\u662f\uff0c\u6bcf\u5f53 LSR \u5c06\u6807\u7b7e\u538b\u5165\u5230\u5df2\u6807\u8bb0\u7684\u6570\u636e\u5305\u4e0a\u65f6\uff0c\u5b83\u9700\u8981\u786e\u4fdd\u65b0\u6807\u7b7e\u5bf9\u5e94\u4e8e\u4e00\u4e2a FEC\uff0c\u5176 LSP \u51fa\u53e3\u662f\u5206\u914d\u6807\u7b7e\u7684 LSR\uff0c\u73b0\u5728\u5806\u6808\u4e2d\u7684\u7b2c\u4e8c\u4e2a\u3002<\/p>\n
    \u5f53 P \u7684 m \u7ea7\u6807\u7b7e\u662f\u5bf9\u5e94\u4e8e FEC F \u7684\u6807\u7b7e\u65f6\uff0c\u5982\u679c\u5b83\u662f\u7279\u5b9a\u6570\u636e\u5305 P \u7684 m \u7ea7 LSP\uff0c\u6211\u4eec\u5c06\u79f0\u4e00\u7cfb\u5217 LSR \u4e3a\u201c\u7279\u5b9a FEC F \u7684 LSP\u201d\u3002<\/p>\n
    \u8003\u8651\u53ef\u80fd\u662f FEC F \u7684 LSP \u5165\u53e3\u8282\u70b9\u7684\u8282\u70b9\u96c6\u3002\u7136\u540e\u6709\u4e00\u4e2a FEC F \u7684 LSP\uff0c\u5b83\u4ee5\u8fd9\u4e9b\u8282\u70b9\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5f00\u59cb\u3002\u5982\u679c\u5176\u4e2d\u8bb8\u591a LSP \u5177\u6709\u76f8\u540c\u7684 LSP \u51fa\u53e3\uff0c\u5219\u53ef\u4ee5\u5c06\u6b64\u7c7b LSP \u7684\u96c6\u5408\u89c6\u4e3a\u4e00\u68f5\u6811\uff0c\u5176\u6839\u662f LSP \u51fa\u53e3\u3002 \uff08\u56e0\u4e3a\u6570\u636e\u6cbf\u7740\u8fd9\u68f5\u6811\u5411\u6839\u4f20\u64ad\uff0c\u8fd9\u53ef\u4ee5\u79f0\u4e3a\u591a\u70b9\u5bf9\u70b9\u6811\u3002\uff09\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u8bf4\u7279\u5b9a FEC F \u7684\u201cLSP \u6811\u201d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.16\u3001 \u5012\u6570\u7b2c\u4e8c\u8df3<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8bf7\u6ce8\u610f\uff0c\u6839\u636e\u7b2c 3.15 \u8282\u7684\u5b9a\u4e49\uff0c\u5982\u679c <R1, …, Rn> \u662f\u6570\u636e\u5305 P \u7684 m \u7ea7 LSP\uff0c\u5219 P \u53ef\u4ee5\u4ece R[n-1] \u4f20\u8f93\u5230\u5e26\u6709\u6df1\u5ea6\u4e3a m-\u7684\u6807\u7b7e\u6808\u7684 Rn- 1.\u4e5f\u5c31\u662f\u8bf4\uff0c\u6807\u7b7e\u6808\u53ef\u80fd\u4f1a\u5728 LSP \u7684\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u5904\u5f39\u51fa\uff0c\u800c\u4e0d\u662f\u5728 LSP \u51fa\u53e3\u5904\u5f39\u51fa\u3002<\/p>\n
    \u4ece\u67b6\u6784\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u662f\u975e\u5e38\u5408\u9002\u7684\u3002 m \u7ea7\u6807\u7b7e\u7684\u76ee\u7684\u662f\u5c06\u6570\u636e\u5305\u9001\u5230 Rn\u3002\u4e00\u65e6R[n-1]\u51b3\u5b9a\u5c06\u6570\u636e\u5305\u53d1\u9001\u7ed9Rn\uff0c\u6807\u7b7e\u5c31\u4e0d\u518d\u5177\u6709\u4efb\u4f55\u4f5c\u7528\uff0c\u4e0d\u518d\u9700\u8981\u643a\u5e26\u3002<\/p>\n
    \u8fdb\u884c\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\u8fd8\u6709\u4e00\u4e2a\u5b9e\u9645\u4f18\u52bf\u3002\u5982\u679c\u4e0d\u8fd9\u6837\u505a\uff0c\u90a3\u4e48\u5f53 LSP \u51fa\u53e3\u6536\u5230\u6570\u636e\u5305\u65f6\uff0c\u5b83\u9996\u5148\u67e5\u627e\u9876\u90e8\u6807\u7b7e\uff0c\u5e76\u6839\u636e\u8be5\u67e5\u627e\u786e\u5b9a\u5b83\u786e\u5b9e\u662f LSP \u51fa\u53e3\u3002\u7136\u540e\u5b83\u5fc5\u987b\u5f39\u51fa\u5806\u6808\uff0c\u5e76\u68c0\u67e5\u6570\u636e\u5305\u7684\u5269\u4f59\u90e8\u5206\u3002\u5982\u679c\u5806\u6808\u4e0a\u6709\u53e6\u4e00\u4e2a\u6807\u7b7e\uff0c\u51fa\u53e3\u5c06\u67e5\u627e\u6b64\u6807\u7b7e\u5e76\u6839\u636e\u6b64\u67e5\u627e\u8f6c\u53d1\u6570\u636e\u5305\u3002 \uff08\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u5305\u7684m\u7ea7LSP\u7684\u51fa\u53e3\u4e5f\u662f\u5176m-1\u7ea7LSP\u7684\u4e2d\u95f4\u8282\u70b9\u3002\uff09\u5982\u679c\u5806\u6808\u4e0a\u6ca1\u6709\u5176\u4ed6\u6807\u7b7e\uff0c\u5219\u6839\u636e\u5176\u7f51\u7edc\u5c42\u76ee\u7684\u5730\u5740\u8f6c\u53d1\u8be5\u6570\u636e\u5305\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u5c06\u8981\u6c42\u51fa\u53e3\u8fdb\u884c\u4e24\u6b21\u67e5\u627e\uff0c\u5373\u4e24\u6b21\u6807\u7b7e\u67e5\u627e\u6216\u6807\u7b7e\u67e5\u627e\u540e\u8ddf\u5730\u5740\u67e5\u627e\u3002<\/p>\n
    \u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u4f7f\u7528\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\uff0c\u90a3\u4e48\u5f53\u5012\u6570\u7b2c\u4e8c\u8df3\u67e5\u627e\u6807\u7b7e\u65f6\uff0c\u5b83\u786e\u5b9a\uff1a<\/p>\n
    \n
    – \u8fd9\u662f\u5012\u6570\u7b2c\u4e8c\u8df3\uff0c\u4ee5\u53ca<\/strong><\/p>\n
    – \u4e0b\u4e00\u8df3\u662f\u8c01\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u7136\u540e\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u5f39\u51fa\u5806\u6808\uff0c\u5e76\u6839\u636e\u901a\u8fc7\u67e5\u627e\u5148\u524d\u4f4d\u4e8e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u83b7\u5f97\u7684\u4fe1\u606f\u8f6c\u53d1\u6570\u636e\u5305\u3002\u5f53 LSP \u51fa\u53e3\u6536\u5230\u6570\u636e\u5305\u65f6\uff0c\u73b0\u5728\u4f4d\u4e8e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u5c06\u662f\u5b83\u9700\u8981\u67e5\u627e\u7684\u6807\u7b7e\uff0c\u4ee5\u4fbf\u505a\u51fa\u81ea\u5df1\u7684\u8f6c\u53d1\u51b3\u5b9a\u3002\u6216\u8005\uff0c\u5982\u679c\u6570\u636e\u5305\u53ea\u643a\u5e26\u4e00\u4e2a\u6807\u7b7e\uff0cLSP \u51fa\u53e3\u5c06\u7b80\u5355\u5730\u770b\u5230\u7f51\u7edc\u5c42\u6570\u636e\u5305\uff0c\u8fd9\u6b63\u662f\u5b83\u505a\u51fa\u8f6c\u53d1\u51b3\u5b9a\u6240\u9700\u8981\u770b\u5230\u7684\u3002<\/p>\n
    \u8fd9\u79cd\u6280\u672f\u5141\u8bb8\u51fa\u53e3\u8fdb\u884c\u5355\u6b21\u67e5\u627e\uff0c\u5e76\u4e14\u4e5f\u53ea\u9700\u8981\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u8fdb\u884c\u5355\u6b21\u67e5\u627e\u3002<\/p>\n
    \u5982\u679c\u77e5\u9053\u53ea\u9700\u8981\u4e00\u6b21\u67e5\u627e\uff0c\u90a3\u4e48\u5728\u6807\u7b7e\u4ea4\u6362\u4ea7\u54c1\u4e2d\u521b\u5efa\u8f6c\u53d1\u201c\u5feb\u901f\u8def\u5f84\u201d\u53ef\u80fd\u4f1a\u6709\u5f88\u5927\u5e2e\u52a9\uff1a<\/p>\n
    \n
    – \u5982\u679c\u53ef\u4ee5\u5047\u8bbe\u53ea\u9700\u8981\u4e00\u6b21\u67e5\u627e\uff0c\u5219\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801<\/strong><\/p>\n
    – \u4ee3\u7801\u53ef\u4ee5\u57fa\u4e8e\u5047\u8bbe\u53ea\u9700\u8981\u4e00\u6b21\u67e5\u627e\u7684\u201c\u65f6\u95f4\u9884\u7b97\u201d\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u4e8b\u5b9e\u4e0a\uff0c\u5f53\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\u5b8c\u6210\u65f6\uff0cLSP \u51fa\u53e3\u751a\u81f3\u4e0d\u9700\u8981\u662f LSR\u3002<\/p>\n
    \u4f46\u662f\uff0c\u67d0\u4e9b\u786c\u4ef6\u4ea4\u6362\u5f15\u64ce\u53ef\u80fd\u65e0\u6cd5\u5f39\u51fa\u6807\u7b7e\u5806\u6808\uff0c\u56e0\u6b64\u4e0d\u80fd\u666e\u904d\u8981\u6c42\u3002\u4e5f\u53ef\u80fd\u5b58\u5728\u4e0d\u5e0c\u671b\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\u7684\u4e00\u4e9b\u60c5\u51b5\u3002\u56e0\u6b64\uff0c\u4ec5\u5f53\u51fa\u53e3\u8282\u70b9\u7279\u522b\u8bf7\u6c42\u65f6\uff0c\u6216\u8005 LSP \u4e2d\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\u4e0d\u652f\u6301 MPLS \u65f6\uff0c\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u624d\u4f1a\u5f39\u51fa\u6807\u7b7e\u5806\u6808\u3002 \uff08\u5982\u679c LSP \u4e2d\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\u786e\u5b9e\u652f\u6301 MPLS\uff0c\u4f46\u6ca1\u6709\u53d1\u51fa\u8fd9\u6837\u7684\u8bf7\u6c42\uff0c\u5219\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u65e0\u6cd5\u77e5\u9053\u5b83\u5b9e\u9645\u4e0a\u662f\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u3002\uff09<\/p>\n
    \u4e00\u4e2a\u5b8c\u5168\u80fd\u591f\u5f39\u51fa\u6807\u7b7e\u6808\u7684 LSR \u5fc5\u987b\u5728\u5176\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u70b9\u8bf7\u6c42\u65f6\u6267\u884c\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\u3002<\/p>\n
    \u521d\u59cb\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u534f\u5546\u5fc5\u987b\u5141\u8bb8\u6bcf\u4e2a LSR \u786e\u5b9a\u5176\u76f8\u90bb\u7684 LSRS \u662f\u5426\u80fd\u591f\u5f39\u51fa\u6807\u7b7e\u5806\u6808\u3002 LSR \u4e0d\u5f97\u8bf7\u6c42\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u5f39\u51fa\u6807\u7b7e\u5806\u6808\uff0c\u9664\u975e\u5b83\u80fd\u591f\u8fd9\u6837\u505a\u3002<\/p>\n
    \u5982\u679c\u4f7f\u7528\u5012\u6570\u7b2c\u4e8c\u8df3\u5f39\u51fa\uff0c\u53ef\u80fd\u4f1a\u8be2\u95ee\u51fa\u53e3\u8282\u70b9\u662f\u5426\u603b\u80fd\u6b63\u786e\u89e3\u91ca\u63a5\u6536\u5230\u7684\u6570\u636e\u5305\u7684\u9876\u90e8\u6807\u7b7e\u3002\u53ea\u8981\u9075\u5b88\u7b2c 3.14 \u8282\u7684\u552f\u4e00\u6027\u548c\u8303\u56f4\u89c4\u5219\uff0c\u5c31\u59cb\u7ec8\u53ef\u4ee5\u660e\u786e\u5730\u89e3\u91ca\u63a5\u6536\u5230\u7684\u6570\u636e\u5305\u7684\u9876\u90e8\u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.17\u3001 LSP \u4e0b\u4e00\u8df3<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7279\u5b9a LSR \u4e2d\u7279\u5b9a\u6807\u8bb0\u6570\u636e\u5305\u7684 LSP \u4e0b\u4e00\u8df3\u662f\u4f5c\u4e3a\u4e0b\u4e00\u8df3\u7684 LSP\uff0c\u7531\u7528\u4e8e\u8f6c\u53d1\u8be5\u6570\u636e\u5305\u7684 NHLFE \u6761\u76ee\u9009\u62e9\u3002<\/p>\n
    \u7279\u5b9a FEC \u7684 LSP \u4e0b\u4e00\u8df3\u662f\u7531 NHLFE \u6761\u76ee\u9009\u62e9\u7684\u4e0b\u4e00\u8df3\uff0c\u8be5\u6761\u76ee\u7531\u5bf9\u5e94\u4e8e\u8be5 FEC \u7684\u6807\u7b7e\u7d22\u5f15\u3002<\/p>\n
    \u8bf7\u6ce8\u610f\uff0cLSP \u4e0b\u4e00\u8df3\u53ef\u80fd\u4e0e\u7f51\u7edc\u5c42\u8def\u7531\u7b97\u6cd5\u9009\u62e9\u7684\u4e0b\u4e00\u8df3\u4e0d\u540c\u3002\u5f53\u6211\u4eec\u63d0\u5230\u540e\u8005\u65f6\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u672f\u8bed\u201cL3 \u4e0b\u4e00\u8df3\u201d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.18\u3001 \u65e0\u6548\u7684\u4f20\u5165\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c LSR \u6536\u5230\u5e26\u6709\u7279\u5b9a\u4f20\u5165\u6807\u7b7e\u7684\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\uff0c\u4f46\u6ca1\u6709\u7ed1\u5b9a\u8be5\u6807\u7b7e\uff0c\u5b83\u5e94\u8be5\u600e\u4e48\u505a\uff1f\u4eba\u4eec\u5f88\u5bb9\u6613\u8ba4\u4e3a\u53ef\u4ee5\u5220\u9664\u6807\u7b7e\uff0c\u5e76\u5c06\u6570\u636e\u5305\u4f5c\u4e3a\u672a\u6807\u8bb0\u7684 IP \u6570\u636e\u5305\u8f6c\u53d1\u3002\u4f46\u662f\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u6837\u505a\u53ef\u80fd\u4f1a\u5bfc\u81f4\u73af\u8def\u3002\u5982\u679c\u4e0a\u6e38 LSR \u8ba4\u4e3a\u6807\u7b7e\u7ed1\u5b9a\u5230\u663e\u5f0f\u8def\u7531\uff0c\u800c\u4e0b\u6e38 LSR \u4e0d\u8ba4\u4e3a\u6807\u7b7e\u7ed1\u5b9a\u4efb\u4f55\u4e1c\u897f\uff0c\u5982\u679c\u65e0\u6807\u7b7e IP \u6570\u636e\u5305\u7684\u9010\u8df3\u8def\u7531\u5c06\u6570\u636e\u5305\u5e26\u56de\u4e0a\u6e38 LSR\uff0c\u7136\u540e\u5f62\u6210\u4e00\u4e2a\u73af\u8def\u3002<\/p>\n
    \u4e5f\u6709\u53ef\u80fd\u8be5\u6807\u7b7e\u65e8\u5728\u8868\u793a\u65e0\u6cd5\u4ece IP \u62a5\u6587\u5934\u63a8\u65ad\u51fa\u7684\u8def\u7531\u3002<\/p>\n
    \u56e0\u6b64\uff0c\u5f53\u63a5\u6536\u5230\u5e26\u6709\u65e0\u6548\u4f20\u5165\u6807\u7b7e\u7684\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u65f6\uff0c\u5fc5\u987b\u5c06\u5176\u4e22\u5f03\uff0c\u9664\u975e\u901a\u8fc7\u67d0\u79cd\u65b9\u5f0f\uff08\u4e0d\u5728\u5f53\u524d\u6587\u6863\u7684\u8303\u56f4\u5185\uff09\u786e\u5b9a\u5c06\u5176\u65e0\u6807\u7b7e\u8f6c\u53d1\u4e0d\u4f1a\u9020\u6210\u4efb\u4f55\u5371\u5bb3\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.19\u3001 LSP \u63a7\u5236\uff1a\u6709\u5e8f\u4e0e\u72ec\u7acb<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u4e9b FEC \u5bf9\u5e94\u4e8e\u901a\u8fc7\u52a8\u6001\u8def\u7531\u7b97\u6cd5\u5206\u914d\u7684\u5730\u5740\u524d\u7f00\u3002\u8fd9\u4e9b FEC \u7684 LSP \u8bbe\u7f6e\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u4e4b\u4e00\u5b8c\u6210\uff1a\u72ec\u7acb LSP \u63a7\u5236\u6216\u6709\u5e8f LSP \u63a7\u5236\u3002<\/p>\n
    \u5728\u72ec\u7acb LSP \u63a7\u5236\u4e2d\uff0c\u6bcf\u4e2a LSR \u5728\u6ce8\u610f\u5230\u5b83\u8bc6\u522b\u7279\u5b9a\u7684 FEC \u540e\uff0c\u505a\u51fa\u72ec\u7acb\u7684\u51b3\u5b9a\uff0c\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u8be5 FEC \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9\u5176\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u3002\u8fd9\u5bf9\u5e94\u4e8e\u4f20\u7edf IP \u6570\u636e\u62a5\u8def\u7531\u7684\u5de5\u4f5c\u65b9\u5f0f\uff1b\u6bcf\u4e2a\u8282\u70b9\u72ec\u7acb\u51b3\u5b9a\u5982\u4f55\u5904\u7406\u6bcf\u4e2a\u6570\u636e\u5305\uff0c\u5e76\u4f9d\u9760\u8def\u7531\u7b97\u6cd5\u5feb\u901f\u6536\u655b\uff0c\u4ee5\u786e\u4fdd\u6bcf\u4e2a\u6570\u636e\u62a5\u6b63\u786e\u6295\u9012\u3002<\/p>\n
    \u5728\u6709\u5e8f LSP \u63a7\u5236\u4e2d\uff0c\u5982\u679c LSR \u662f\u8be5 FEC \u7684\u51fa\u53e3 LSR\uff0c\u6216\u8005\u5982\u679c\u5b83\u5df2\u7ecf\u4ece\u8be5 FEC \u7684\u4e0b\u4e00\u8df3\u63a5\u6536\u5230\u8be5 FEC \u7684\u6807\u7b7e\u7ed1\u5b9a\uff0c\u5219 LSR \u4ec5\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u7279\u5b9a FEC\u3002<\/p>\n
    \u5982\u679c\u8981\u786e\u4fdd\u7279\u5b9a FEC \u4e2d\u7684\u6d41\u91cf\u9075\u5faa\u5177\u6709\u67d0\u4e9b\u6307\u5b9a\u5c5e\u6027\u96c6\u7684\u8def\u5f84\uff08\u4f8b\u5982\uff0c\u6d41\u91cf\u4e0d\u4f1a\u4e24\u6b21\u904d\u5386\u4efb\u4f55\u8282\u70b9\uff0c\u6d41\u91cf\u53ef\u4ee5\u4f7f\u7528\u6307\u5b9a\u6570\u91cf\u7684\u8d44\u6e90\uff0c\u6d41\u91cf\u9075\u5faa\u660e\u786e\u6307\u5b9a\u7684\u8def\u5f84\u7b49\uff09\u5fc5\u987b\u4f7f\u7528\u6709\u5e8f\u63a7\u4ef6\u3002\u5728\u72ec\u7acb\u63a7\u5236\u4e0b\uff0c\u4e00\u4e9b LSR \u53ef\u80fd\u4f1a\u5728 LSP \u5b8c\u5168\u5efa\u7acb\u4e4b\u524d\u5f00\u59cb\u5bf9 FEC \u4e2d\u7684\u6d41\u91cf\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\uff0c\u56e0\u6b64 FEC \u4e2d\u7684\u4e00\u4e9b\u6d41\u91cf\u53ef\u80fd\u4f1a\u9075\u5faa\u4e0d\u5177\u6709\u6307\u5b9a\u5c5e\u6027\u96c6\u7684\u8def\u5f84\u3002\u5982\u679c FEC \u7684\u8bc6\u522b\u662f\u5efa\u7acb\u76f8\u5e94 LSP \u7684\u7ed3\u679c\uff0c\u5219\u4e5f\u9700\u8981\u4f7f\u7528\u6709\u5e8f\u63a7\u5236\u3002<\/p>\n
    \u6709\u5e8f LSP \u5efa\u7acb\u53ef\u4ee5\u7531\u5165\u53e3\u6216\u51fa\u53e3\u53d1\u8d77\u3002<\/p>\n
    \u6709\u5e8f\u63a7\u5236\u548c\u72ec\u7acb\u63a7\u5236\u5b8c\u5168\u53ef\u4ee5\u4e92\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u9664\u975e LSP \u4e2d\u7684\u6240\u6709 LSR \u90fd\u4f7f\u7528\u6709\u5e8f\u63a7\u5236\uff0c\u5426\u5219\u5bf9\u7f51\u7edc\u884c\u4e3a\u7684\u603b\u4f53\u5f71\u54cd\u4e3b\u8981\u662f\u72ec\u7acb\u63a7\u5236\u7684\u5f71\u54cd\uff0c\u56e0\u4e3a\u5728 LSP \u5b8c\u5168\u5efa\u7acb\u4e4b\u524d\u65e0\u6cd5\u786e\u5b9a\u5b83\u4e0d\u4f1a\u88ab\u4f7f\u7528\u3002<\/p>\n
    \u8fd9\u79cd\u67b6\u6784\u5141\u8bb8\u5728\u72ec\u7acb\u63a7\u5236\u548c\u6709\u5e8f\u63a7\u5236\u4e4b\u95f4\u8fdb\u884c\u9009\u62e9\u6210\u4e3a\u5c40\u90e8\u95ee\u9898\u3002\u7531\u4e8e\u8fd9\u4e24\u79cd\u65b9\u6cd5\u76f8\u4e92\u4f5c\u7528\uff0c\u7ed9\u5b9a\u7684 LSR \u53ea\u9700\u8981\u652f\u6301\u5176\u4e2d\u4e00\u79cd\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u72ec\u7acb\u63a7\u5236\u548c\u6709\u5e8f\u63a7\u5236\u7684\u9009\u62e9\u4f3c\u4e4e\u5bf9\u9700\u8981\u5b9a\u4e49\u7684\u6807\u7b7e\u5206\u53d1\u673a\u5236\u6ca1\u6709\u4efb\u4f55\u5f71\u54cd\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.20\u3001 \u805a\u5408<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5c06\u6d41\u91cf\u5212\u5206\u4e3a FEC \u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u4e3a\u8def\u7531\u8868\u4e2d\u51fa\u73b0\u7684\u6bcf\u4e2a\u5730\u5740\u524d\u7f00\u521b\u5efa\u4e00\u4e2a\u5355\u72ec\u7684 FEC\u3002\u7136\u800c\uff0c\u5728\u7279\u5b9a\u7684 MPLS \u57df\u5185\uff0c\u8fd9\u53ef\u80fd\u4f1a\u4ea7\u751f\u4e00\u7ec4 FEC\uff0c\u4f7f\u5f97\u6240\u6709\u8fd9\u4e9b FEC \u4e2d\u7684\u6240\u6709\u6d41\u91cf\u90fd\u9075\u5faa\u76f8\u540c\u7684\u8def\u7531\u3002\u4f8b\u5982\uff0c\u4e00\u7ec4\u4e0d\u540c\u7684\u5730\u5740\u524d\u7f00\u53ef\u80fd\u90fd\u5177\u6709\u76f8\u540c\u7684\u51fa\u53e3\u8282\u70b9\uff0c\u5e76\u4e14\u6807\u7b7e\u4ea4\u6362\u53ef\u80fd\u4ec5\u7528\u4e8e\u5c06\u6d41\u91cf\u83b7\u53d6\u5230\u51fa\u53e3\u8282\u70b9\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5728 MPLS \u57df\u5185\uff0c\u8fd9\u4e9b FEC \u7684\u8054\u5408\u672c\u8eab\u5c31\u662f\u4e00\u4e2a FEC\u3002\u8fd9\u5c31\u4ea7\u751f\u4e86\u4e00\u4e2a\u9009\u62e9\uff1a\u5e94\u8be5\u5c06\u4e0d\u540c\u7684\u6807\u7b7e\u7ed1\u5b9a\u5230\u6bcf\u4e2a\u7ec4\u4ef6 FEC\uff0c\u8fd8\u662f\u5e94\u8be5\u5c06\u5355\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230\u8054\u5408\uff0c\u5e76\u5c06\u8be5\u6807\u7b7e\u5e94\u7528\u4e8e\u8054\u5408\u4e2d\u7684\u6240\u6709\u6d41\u91cf\uff1f<\/p>\n
    \u5c06\u5355\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230 FEC \u8054\u5408\uff08\u5728\u67d0\u4e2a\u57df\u5185\uff09\u5e76\u5c06\u8be5\u6807\u7b7e\u5e94\u7528\u4e8e\u8054\u5408\u4e2d\u7684\u6240\u6709\u6d41\u91cf\u7684\u8fc7\u7a0b\u79f0\u4e3a\u201c\u805a\u5408\u201d\u3002 MPLS \u67b6\u6784\u5141\u8bb8\u805a\u5408\u3002\u805a\u5408\u53ef\u4ee5\u51cf\u5c11\u5904\u7406\u4e00\u7ec4\u7279\u5b9a\u6570\u636e\u5305\u6240\u9700\u7684\u6807\u7b7e\u6570\u91cf\uff0c\u8fd8\u53ef\u4ee5\u51cf\u5c11\u6240\u9700\u7684\u6807\u7b7e\u5206\u53d1\u63a7\u5236\u6d41\u91cf\u3002<\/p>\n
    \u7ed9\u5b9a\u4e00\u7ec4\u201c\u53ef\u805a\u5408\u201d\u4e3a\u5355\u4e2a FEC \u7684 FEC\uff0c\u53ef\u4ee5 (a) \u5c06\u5b83\u4eec\u805a\u5408\u4e3a\u5355\u4e2a FEC\uff0c(b) \u5c06\u5b83\u4eec\u805a\u5408\u4e3a\u4e00\u7ec4 FEC\uff0c\u6216 (c) \u6839\u672c\u4e0d\u805a\u5408\u5b83\u4eec<\/strong>\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u8bf4\u805a\u5408\u7684\u201c\u7c92\u5ea6\u201d\uff0c(a) \u662f\u201c\u6700\u7c97\u7c92\u5ea6\u201d\uff0c(c) \u662f\u201c\u6700\u7ec6\u7c92\u5ea6\u201d\u3002<\/p>\n
    \u5f53\u4f7f\u7528\u987a\u5e8f\u63a7\u5236\u65f6\uff0c\u5bf9\u4e8e\u7ed9\u5b9a\u7684\u4e00\u7ec4 FEC\uff0c\u6bcf\u4e2a LSR \u5e94\u8be5\u91c7\u7528\u5176\u4e0b\u4e00\u8df3\u7528\u4e8e\u8fd9\u4e9b FEC \u7684\u7c92\u5ea6\u3002<\/p>\n
    \u5f53\u4f7f\u7528\u72ec\u7acb\u63a7\u5236\u65f6\uff0c\u53ef\u80fd\u4f1a\u6709\u4e24\u4e2a\u76f8\u90bb\u7684 LSR\uff0cRu \u548c Rd\uff0c\u5b83\u4eec\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u805a\u5408\u4e00\u4e9b FEC\u3002<\/p>\n
    \u5982\u679c Ru \u7684\u7c92\u5ea6\u6bd4 Rd \u66f4\u7ec6\uff0c\u8fd9\u4e0d\u4f1a\u5bfc\u81f4\u95ee\u9898\u3002 Ru \u4e3a\u8fd9\u7ec4 FEC \u5206\u914d\u7684\u6807\u7b7e\u6bd4 Rd \u591a\u3002\u8fd9\u610f\u5473\u7740\u5f53 Ru \u9700\u8981\u5c06\u90a3\u4e9b FEC \u4e2d\u7684\u6807\u8bb0\u6570\u636e\u5305\u8f6c\u53d1\u5230 Rd \u65f6\uff0c\u5b83\u53ef\u80fd\u9700\u8981\u5c06 n \u4e2a\u6807\u7b7e\u6620\u5c04\u5230 m \u4e2a\u6807\u7b7e\uff0c\u5176\u4e2d n > m\u3002\u4f5c\u4e3a\u4e00\u79cd\u9009\u62e9\uff0cRu \u53ef\u4ee5\u64a4\u56de\u5b83\u5df2\u7ecf\u5206\u53d1\u7684 n \u4e2a\u6807\u7b7e\u7684\u96c6\u5408\uff0c\u7136\u540e\u5206\u53d1\u4e00\u7ec4 m \u4e2a\u6807\u7b7e\uff0c\u5bf9\u5e94\u4e8e Rd \u7684\u7c92\u5ea6\u7ea7\u522b\u3002\u8fd9\u4e0d\u662f\u786e\u4fdd\u6b63\u786e\u64cd\u4f5c\u6240\u5fc5\u9700\u7684\uff0c\u4f46\u5b83\u786e\u5b9e\u5bfc\u81f4 Ru \u5206\u914d\u7684\u6807\u7b7e\u6570\u91cf\u51cf\u5c11\uff0c\u5e76\u4e14 Ru \u901a\u8fc7\u5206\u914d\u66f4\u591a\u6570\u91cf\u7684\u6807\u7b7e\u5e76\u6ca1\u6709\u83b7\u5f97\u4efb\u4f55\u7279\u522b\u7684\u4f18\u52bf\u3002\u662f\u5426\u8fd9\u6837\u505a\u7684\u51b3\u5b9a\u662f\u672c\u5730\u7684\u4e8b\u60c5\u3002<\/p>\n
    \u5982\u679c Ru \u7684\u7c92\u5ea6\u6bd4 Rd \u66f4\u7c97\uff08\u5373\uff0cRd \u4e3a FEC \u96c6\u5206\u914d\u4e86 n \u4e2a\u6807\u7b7e\uff0c\u800c Ru \u5206\u914d\u4e86 m\uff0c\u5176\u4e2d n > m\uff09\uff0c\u5b83\u6709\u4e24\u4e2a\u9009\u62e9\uff1a<\/p>\n
    \n
    – \u5b83\u53ef\u4ee5\u91c7\u7528 Rd \u7684\u66f4\u7ec6\u7c92\u5ea6\u7ea7\u522b\u3002\u8fd9\u5c06\u8981\u6c42\u5b83\u64a4\u56de\u5df2\u5206\u53d1\u7684 m \u4e2a\u6807\u7b7e\uff0c\u5e76\u5206\u53d1 n \u4e2a\u6807\u7b7e\u3002\u8fd9\u662f\u9996\u9009\u9009\u9879\u3002<\/strong><\/p>\n
    – \u5b83\u53ef\u4ee5\u7b80\u5355\u5730\u5c06\u5b83\u7684 m \u4e2a\u6807\u7b7e\u6620\u5c04\u5230 Rd \u7684 n \u4e2a\u6807\u7b7e\u7684\u5b50\u96c6\uff0c\u5982\u679c\u5b83\u53ef\u4ee5\u786e\u5b9a\u8fd9\u5c06\u4ea7\u751f\u76f8\u540c\u7684\u8def\u7531\u3002\u4f8b\u5982\uff0c\u5047\u8bbe Ru \u5c06\u5355\u4e2a\u6807\u7b7e\u5e94\u7528\u4e8e\u9700\u8981\u901a\u8fc7\u67d0\u4e2a\u51fa\u53e3 LSR \u7684\u6240\u6709\u6d41\u91cf\uff0c\u800c Rd \u5c06\u8bb8\u591a\u4e0d\u540c\u7684\u6807\u7b7e\u7ed1\u5b9a\u5230\u6b64\u7c7b\u6d41\u91cf\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6570\u636e\u5305\u7684\u5404\u4e2a\u76ee\u6807\u5730\u5740\u3002\u5982\u679c Ru \u77e5\u9053\u51fa\u53e3\u8def\u7531\u5668\u7684\u5730\u5740\uff0c\u5e76\u4e14\u5982\u679c Rd \u5df2\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u7531\u8be5\u5730\u5740\u6807\u8bc6\u7684 FEC\uff0c\u5219 Ru \u53ef\u4ee5\u7b80\u5355\u5730\u5e94\u7528\u8be5\u6807\u7b7e\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a LSR \u90fd\u9700\u8981\uff08\u901a\u8fc7\u914d\u7f6e\uff09\u77e5\u9053\u5b83\u5206\u914d\u7684\u6807\u7b7e\u4f7f\u7528\u4ec0\u4e48\u7c92\u5ea6\u3002\u5728\u4f7f\u7528\u6709\u5e8f\u63a7\u5236\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u8981\u6c42\u6bcf\u4e2a\u8282\u70b9\u4ec5\u77e5\u9053\u5728\u8be5\u8282\u70b9\u79bb\u5f00 MPLS \u7f51\u7edc\u7684 FEC \u7684\u7c92\u5ea6\u3002\u5bf9\u4e8e\u72ec\u7acb\u63a7\u5236\uff0c\u53ef\u4ee5\u901a\u8fc7\u786e\u4fdd\u6240\u6709 LSR \u4e00\u81f4\u914d\u7f6e\u4e3a\u4e86\u89e3\u6bcf\u4e2a FEC \u7684\u7c92\u5ea6\u6765\u83b7\u5f97\u6700\u4f73\u7ed3\u679c\u3002\u7136\u800c\uff0c\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u9002\u7528\u4e8e\u6240\u6709 FEC \u7684\u5355\u4e00\u7c92\u5ea6\u7ea7\u522b\u6765\u5b8c\u6210\uff08\u4f8b\u5982\u201c\u8f6c\u53d1\u8868\u4e2d\u6bcf\u4e2a IP \u524d\u7f00\u4e00\u4e2a\u6807\u7b7e\u201d\uff0c\u6216\u201c\u6bcf\u4e2a\u51fa\u53e3\u8282\u70b9\u4e00\u4e2a\u6807\u7b7e\u201d\uff09\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.21\u3001 \u8def\u7531\u9009\u62e9<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8def\u7531\u9009\u62e9\u662f\u6307\u7528\u4e8e\u4e3a\u7279\u5b9a FEC \u9009\u62e9 LSP \u7684\u65b9\u6cd5\u3002\u63d0\u8bae\u7684 MPLS \u534f\u8bae\u67b6\u6784\u652f\u6301\u4e24\u79cd\u8def\u7531\u9009\u62e9\u9009\u9879\uff1a(1) \u9010\u8df3\u8def\u7531\uff0c\u548c (2) \u663e\u5f0f\u8def\u7531<\/strong>\u3002<\/p>\n
    \u9010\u8df3\u8def\u7531\u5141\u8bb8\u6bcf\u4e2a\u8282\u70b9\u72ec\u7acb\u5730\u4e3a\u6bcf\u4e2a FEC \u9009\u62e9\u4e0b\u4e00\u8df3\u3002\u8fd9\u662f\u5f53\u4eca\u73b0\u6709 IP \u7f51\u7edc\u4e2d\u7684\u5e38\u7528\u6a21\u5f0f\u3002 \u201c\u9010\u8df3\u8def\u7531LSP\u201d\u662f\u4f7f\u7528\u9010\u8df3\u8def\u7531\u9009\u62e9\u5176\u8def\u7531\u7684LSP\u3002<\/p>\n
    \u5728\u663e\u5f0f\u8def\u7531\u7684 LSP \u4e2d\uff0c\u6bcf\u4e2a LSR \u5e76\u4e0d\u72ec\u7acb\u9009\u62e9\u4e0b\u4e00\u8df3\uff1b\u76f8\u53cd\uff0c\u5355\u4e2a LSR\uff0c\u901a\u5e38\u662f LSP \u5165\u53e3\u6216 LSP \u51fa\u53e3\uff0c\u6307\u5b9a LSP \u4e2d\u7684\u51e0\u4e2a\uff08\u6216\u6240\u6709\uff09LSR\u3002\u5982\u679c\u5355\u4e2a LSR \u6307\u5b9a\u4e86\u6574\u4e2a LSP\uff0c\u5219\u8be5 LSP \u5c06\u201c\u4e25\u683c\u201d\u663e\u5f0f\u8def\u7531\u3002\u5982\u679c\u5355\u4e2a LSR \u4ec5\u6307\u5b9a\u90e8\u5206 LSP\uff0c\u5219\u8be5 LSP \u5c06\u201c\u677e\u6563\u5730\u201d\u663e\u5f0f\u8def\u7531\u3002<\/p>\n
    LSR \u540e\u8ddf\u4e00\u4e2a\u663e\u5f0f\u8def\u7531 LSP \u7684\u5e8f\u5217\u53ef\u4ee5\u7531\u914d\u7f6e\u9009\u62e9\uff0c\u4e5f\u53ef\u4ee5\u7531\u5355\u4e2a\u8282\u70b9\u52a8\u6001\u9009\u62e9\uff08\u4f8b\u5982\uff0c\u51fa\u53e3\u8282\u70b9\u53ef\u4ee5\u5229\u7528\u4ece\u94fe\u8def\u72b6\u6001\u6570\u636e\u5e93\u4e2d\u5b66\u5230\u7684\u62d3\u6251\u4fe1\u606f\u6765\u8ba1\u7b97\u4ee5\u8be5\u51fa\u53e3\u8282\u70b9\u7ed3\u675f\u7684\u6811\u7684\u6574\u4e2a\u8def\u5f84\uff09\u3002<\/p>\n
    \u663e\u5f0f\u8def\u7531\u53ef\u80fd\u6709\u591a\u79cd\u7528\u9014\uff0c\u4f8b\u5982\u7b56\u7565\u8def\u7531\u6216\u6d41\u91cf\u5de5\u7a0b\u3002\u5728 MPLS \u4e2d\uff0c\u9700\u8981\u5728\u5206\u914d\u6807\u7b7e\u65f6\u6307\u5b9a\u663e\u5f0f\u8def\u7531\uff0c\u4f46\u4e0d\u5fc5\u4e3a\u6bcf\u4e2a IP \u6570\u636e\u5305\u6307\u5b9a\u663e\u5f0f\u8def\u7531\u3002\u8fd9\u4f7f\u5f97 MPLS \u663e\u5f0f\u8def\u7531\u6bd4 IP \u6e90\u8def\u7531\u7684\u66ff\u4ee3\u65b9\u6848\u66f4\u6709\u6548\u3002<\/p>\n
    \u4f7f\u7528\u663e\u5f0f\u8def\u7531\u7684\u8fc7\u7a0b\uff0c\u65e0\u8bba\u662f\u4e25\u683c\u7684\u8fd8\u662f\u677e\u6563\u7684\uff0c\u90fd\u8d85\u51fa\u4e86\u672c\u6587\u6863\u7684\u8303\u56f4\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.22\u3001 \u7f3a\u5c11\u8f93\u51fa\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u6cbf LSP \u4f20\u8f93\u65f6\uff0c\u6709\u65f6\u53ef\u80fd\u4f1a\u53d1\u751f\u5b83\u5230\u8fbe LSR \u65f6 ILM \u4e0d\u4f1a\u5c06\u6570\u636e\u5305\u7684\u4f20\u5165\u6807\u7b7e\u6620\u5c04\u5230 NHLFE \u7684\u60c5\u51b5\uff0c\u5373\u4f7f\u4f20\u5165\u6807\u7b7e\u672c\u8eab\u662f\u6709\u6548\u7684\u3002\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u7684\u539f\u56e0\u53ef\u80fd\u662f\u77ac\u6001\u6761\u4ef6\uff0c\u6216\u8005\u5e94\u8be5\u662f\u6570\u636e\u5305\u4e0b\u4e00\u8df3\u7684 LSR \u4e0a\u7684\u9519\u8bef\u3002<\/p>\n
    \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5265\u79bb\u6807\u7b7e\u5806\u6808\u5e76\u5c1d\u8bd5\u6839\u636e\u5176\u7f51\u7edc\u5c42\u6807\u5934\u901a\u8fc7\u4f20\u7edf\u8f6c\u53d1\u8fdb\u4e00\u6b65\u8f6c\u53d1\u6570\u636e\u5305\u662f\u5f88\u8bf1\u4eba\u7684\u3002\u4f46\u662f\uff0c\u901a\u5e38\u8fd9\u4e0d\u662f\u4e00\u4e2a\u5b89\u5168\u7684\u7a0b\u5e8f\uff1a<\/p>\n
    \n
    – \u5982\u679c\u6570\u636e\u5305\u4e00\u76f4\u9075\u5faa\u660e\u786e\u8def\u7531\u7684 LSP\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u73af\u8def\u3002<\/strong><\/p>\n
    – \u6570\u636e\u5305\u7684\u7f51\u7edc\u5934\u53ef\u80fd\u6ca1\u6709\u8db3\u591f\u7684\u4fe1\u606f\u6765\u4f7f\u8fd9\u4e2a\u7279\u5b9a\u7684 LSR \u80fd\u591f\u6b63\u786e\u5730\u8f6c\u53d1\u5b83\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u9664\u975e\u53ef\u4ee5\u786e\u5b9a\uff08\u901a\u8fc7\u672c\u6587\u6863\u8303\u56f4\u4e4b\u5916\u7684\u67d0\u79cd\u65b9\u5f0f\uff09\u8fd9\u4e24\u79cd\u60c5\u51b5\u90fd\u4e0d\u4f1a\u53d1\u751f\uff0c\u5426\u5219\u552f\u4e00\u5b89\u5168\u7684\u7a0b\u5e8f\u662f\u4e22\u5f03\u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.23\u3001 \u751f\u5b58\u65f6\u95f4 (TTL)<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u4f20\u7edf\u7684 IP \u8f6c\u53d1\u4e2d\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u5728\u5176\u62a5\u6587\u5934\u4e2d\u643a\u5e26\u4e00\u4e2a\u201c\u751f\u5b58\u65f6\u95f4\u201d(TTL) \u503c\u3002\u6bcf\u5f53\u6570\u636e\u5305\u901a\u8fc7\u8def\u7531\u5668\u65f6\uff0c\u5176 TTL \u51cf 1\uff1b\u5982\u679c TTL \u5728\u6570\u636e\u5305\u5230\u8fbe\u76ee\u7684\u5730\u4e4b\u524d\u8fbe\u5230 0\uff0c\u5219\u6570\u636e\u5305\u5c06\u88ab\u4e22\u5f03\u3002<\/p>\n
    \u8fd9\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7a0b\u5ea6\u7684\u4fdd\u62a4\uff0c\u9632\u6b62\u7531\u4e8e\u914d\u7f6e\u9519\u8bef\u6216\u8def\u7531\u7b97\u6cd5\u5931\u8d25\u6216\u6536\u655b\u7f13\u6162\u800c\u53ef\u80fd\u5b58\u5728\u7684\u8f6c\u53d1\u73af\u8def\u3002 TTL \u6709\u65f6\u4e5f\u7528\u4e8e\u5176\u4ed6\u529f\u80fd\uff0c\u4f8b\u5982\u7ec4\u64ad\u8303\u56f4\uff0c\u5e76\u652f\u6301\u201ctraceroute\u201d\u547d\u4ee4\u3002\u8fd9\u610f\u5473\u7740 MPLS \u9700\u8981\u5904\u7406\u4e24\u4e2a\u4e0e TTL \u76f8\u5173\u7684\u95ee\u9898\uff1a (i) TTL \u4f5c\u4e3a\u6291\u5236\u73af\u8def\u7684\u4e00\u79cd\u65b9\u5f0f\uff1b (ii) TTL \u4f5c\u4e3a\u5b8c\u6210\u5176\u4ed6\u529f\u80fd\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u4f8b\u5982\u9650\u5236\u6570\u636e\u5305\u7684\u8303\u56f4<\/strong>\u3002<\/p>\n
    \u5f53\u4e00\u4e2a\u6570\u636e\u5305\u6cbf\u7740\u4e00\u6761 LSP \u4f20\u8f93\u65f6\uff0c\u5b83\u5e94\u8be5\u4ee5\u76f8\u540c\u7684 TTL \u503c\u51fa\u73b0\uff0c\u5982\u679c\u5b83\u5728\u6ca1\u6709\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\u7684\u60c5\u51b5\u4e0b\u7a7f\u8fc7\u76f8\u540c\u7684\u8def\u7531\u5668\u5e8f\u5217\uff0c\u5b83\u5c31\u4f1a\u5177\u6709\u76f8\u540c\u7684 TTL \u503c\u3002\u5982\u679c\u6570\u636e\u5305\u6cbf\u7740 LSP \u7684\u5c42\u6b21\u7ed3\u6784\u4f20\u8f93\uff0c\u5f53\u5b83\u4ece LSP \u7684\u5c42\u6b21\u7ed3\u6784\u4e2d\u51fa\u73b0\u65f6\uff0c\u6240\u7ecf\u8fc7\u7684 LSR \u8df3\u7684\u603b\u6570\u5e94\u8be5\u53cd\u6620\u5728\u5b83\u7684 TTL \u503c\u4e2d\u3002<\/p>\n
    \u5904\u7406 TTL \u7684\u65b9\u5f0f\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e MPLS \u6807\u7b7e\u503c\u662f\u5426\u643a\u5e26\u5728 MPLS \u7279\u5b9a\u7684\u201c\u586b\u5145\u201d\u62a5\u6587\u5934 [MPLS-SHIM] \u4e2d\uff0c\u6216\u8005 MPLS \u6807\u7b7e\u662f\u5426\u643a\u5e26\u5728 L2 \u62a5\u6587\u5934\u4e2d\uff0c\u4f8b\u5982 ATM \u62a5\u6587\u5934 [ MPLS-ATM] \u6216\u5e27\u4e2d\u7ee7\u62a5\u6587\u5934 [MPLS-FRMRLY]\u3002<\/p>\n
    \u5982\u679c\u6807\u7b7e\u503c\u88ab\u7f16\u7801\u5728\u4f4d\u4e8e\u6570\u636e\u94fe\u8def\u548c\u7f51\u7edc\u5c42\u5934\u4e4b\u95f4\u7684\u201c\u586b\u5145\u201d\u4e2d\uff0c\u90a3\u4e48\u8fd9\u4e2a\u586b\u5145\u5fc5\u987b\u6709\u4e00\u4e2a TTL \u5b57\u6bb5\uff0c\u5b83\u5e94\u8be5\u6700\u521d\u4ece\u7f51\u7edc\u5c42\u5934\u7684 TTL \u5b57\u6bb5\u52a0\u8f7d\uff0c\u5e94\u8be5\u5728\u6bcf\u4e2a LSR \u5904\u9012\u51cf\u3002\u5f53\u6570\u636e\u5305\u4ece\u5b83\u7684 LSP \u51fa\u73b0\u65f6\uff0c\u5e94\u8be5\u88ab\u590d\u5236\u5230\u7f51\u7edc\u5c42\u62a5\u6587\u5934 TTL \u5b57\u6bb5\u4e2d\u3002<\/p>\n
    \u5982\u679c\u6807\u7b7e\u503c\u7f16\u7801\u5728\u6570\u636e\u94fe\u8def\u5c42\u62a5\u6587\u5934\u4e2d\uff08\u4f8b\u5982\uff0cATM \u7684 AAL5 \u62a5\u6587\u5934\u4e2d\u7684 VPI\/VCI \u5b57\u6bb5\uff09\uff0c\u5e76\u4e14\u6807\u8bb0\u7684\u6570\u636e\u5305\u7531 L2 \u4ea4\u6362\u673a\uff08\u4f8b\u5982\uff0cATM \u4ea4\u6362\u673a\uff09\u8f6c\u53d1\uff0c\u5219\u6570\u636e\u94fe\u8def\u5c42\uff08\u50cf ATM\uff09\u672c\u8eab\u6ca1\u6709 TTL \u5b57\u6bb5\uff0c\u90a3\u4e48\u5c31\u4e0d\u53ef\u80fd\u5728\u6bcf\u4e2a LSR \u8df3\u4e0a\u9012\u51cf\u6570\u636e\u5305\u7684 TTL\u3002\u7531\u4e00\u7cfb\u5217\u4e0d\u80fd\u9012\u51cf\u6570\u636e\u5305\u7684 TTL \u7684 LSR \u7ec4\u6210\u7684 LSP \u6bb5\u5c06\u79f0\u4e3a\u201c\u975e TTL LSP \u6bb5\u201d\u3002<\/p>\n
    \u5f53\u4e00\u4e2a\u6570\u636e\u5305\u4ece\u4e00\u4e2a\u975e TTL LSP \u6bb5\u51fa\u73b0\u65f6\uff0c\u5b83\u5e94\u8be5\u88ab\u8d4b\u4e88\u4e00\u4e2a TTL \u6765\u53cd\u6620\u5b83\u6240\u7ecf\u8fc7\u7684 LSR \u8df3\u6570\u3002\u5728\u5355\u64ad\u60c5\u51b5\u4e0b\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5c06\u6709\u610f\u4e49\u7684 LSP \u957f\u5ea6\u4f20\u64ad\u5230\u5165\u53e3\u8282\u70b9\u6765\u5b9e\u73b0\uff0c\u4f7f\u5165\u53e3\u80fd\u591f\u5728\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230\u975e TTL LSP \u6bb5\u4e4b\u524d\u9012\u51cf TTL \u503c\u3002<\/p>\n
    \u6709\u65f6\u53ef\u4ee5\u786e\u5b9a\uff0c\u5728\u8fdb\u5165\u975e TTL LSP \u6bb5\u65f6\uff0c\u7279\u5b9a\u6570\u636e\u5305\u7684 TTL \u5c06\u5728\u6570\u636e\u5305\u5230\u8fbe\u8be5\u975e TTL LSP \u6bb5\u7684\u51fa\u53e3\u4e4b\u524d\u5230\u671f\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u975e TTL LSP \u6bb5\u5165\u53e3\u5904\u7684 LSR \u4e0d\u5f97\u5bf9\u6570\u636e\u5305\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\u3002\u8fd9\u610f\u5473\u7740\u5fc5\u987b\u5f00\u53d1\u7279\u6b8a\u7a0b\u5e8f\u6765\u652f\u6301\u8ddf\u8e2a\u8def\u7531\u529f\u80fd\uff0c\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4f20\u7edf\u7684\u9010\u8df3\u8f6c\u53d1\u6765\u8f6c\u53d1\u8ddf\u8e2a\u8def\u7531\u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.24\u3001 \u73af\u8def\u63a7\u5236<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u975e TTL LSP \u6bb5\u4e0a\uff0c\u6839\u636e\u5b9a\u4e49\uff0cTTL \u4e0d\u80fd\u7528\u4e8e\u9632\u6b62\u8f6c\u53d1\u73af\u8def\u3002\u73af\u8def\u63a7\u5236\u7684\u91cd\u8981\u6027\u53ef\u80fd\u53d6\u51b3\u4e8e\u7528\u4e8e\u6cbf\u975e TTL LSP \u6bb5\u63d0\u4f9b LSR \u529f\u80fd\u7684\u7279\u5b9a\u786c\u4ef6\u3002<\/p>\n
    \u4f8b\u5982\uff0c\u5047\u8bbe\u4f7f\u7528 ATM \u4ea4\u6362\u786c\u4ef6\u6765\u63d0\u4f9b MPLS \u4ea4\u6362\u529f\u80fd\uff0c\u6807\u7b7e\u643a\u5e26\u5728 VPI\/VCI \u5b57\u6bb5\u4e2d\u3002\u7531\u4e8e ATM \u4ea4\u6362\u786c\u4ef6\u4e0d\u80fd\u51cf\u5c11 TTL\uff0c\u56e0\u6b64\u6ca1\u6709\u9632\u6b62\u73af\u8def\u7684\u4fdd\u62a4\u3002\u5982\u679c ATM \u786c\u4ef6\u80fd\u591f\u4e3a\u643a\u5e26\u4e0d\u540c VPI\/VCI \u503c\u7684\u4f20\u5165\u4fe1\u5143\u63d0\u4f9b\u5bf9\u7f13\u51b2\u6c60\u7684\u516c\u5e73\u8bbf\u95ee\uff0c\u5219\u8fd9\u79cd\u73af\u8def\u53ef\u80fd\u4e0d\u4f1a\u5bf9\u5176\u4ed6\u6d41\u91cf\u4ea7\u751f\u4efb\u4f55\u6709\u5bb3\u5f71\u54cd\u3002\u7136\u800c\uff0c\u5982\u679c ATM \u786c\u4ef6\u4e0d\u80fd\u63d0\u4f9b\u8fd9\u79cd\u516c\u5e73\u7684\u7f13\u51b2\u533a\u8bbf\u95ee\uff0c\u90a3\u4e48\u5373\u4f7f\u662f\u77ac\u65f6\u73af\u8def\u4e5f\u53ef\u80fd\u5bfc\u81f4 LSR \u7684\u603b\u4f53\u6027\u80fd\u4e25\u91cd\u4e0b\u964d\u3002<\/p>\n
    \u5373\u4f7f\u53ef\u4ee5\u63d0\u4f9b\u516c\u5e73\u7684\u7f13\u51b2\u533a\u8bbf\u95ee\uff0c\u4ecd\u7136\u503c\u5f97\u62e5\u6709\u4e00\u4e9b\u68c0\u6d4b\u6301\u7eed\u201c\u6bd4\u53ef\u80fd\u66f4\u957f\u201d\u7684\u73af\u8def\u7684\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u5373\u4f7f TTL \u548c\/\u6216\u6bcf VC \u516c\u5e73\u961f\u5217\u63d0\u4f9b\u4e86\u4e00\u79cd\u4f7f\u73af\u8def\u5e78\u5b58\u7684\u65b9\u6cd5\uff0c\u4f46\u5728\u53ef\u884c\u7684\u60c5\u51b5\u4e0b\u4ecd\u7136\u53ef\u80fd\u9700\u8981\u907f\u514d\u8bbe\u7f6e LSP \u73af\u8def\u3002\u56e0\u6b64\uff0c\u6240\u6709\u53ef\u80fd\u9644\u52a0\u5230\u975e TTL LSP \u6bb5\u7684 LSR \u90fd\u9700\u8981\u652f\u6301\u7528\u4e8e\u73af\u8def\u68c0\u6d4b\u7684\u901a\u7528\u6280\u672f\uff1b\u7136\u800c\uff0c\u73af\u8def\u68c0\u6d4b\u6280\u672f\u7684\u4f7f\u7528\u662f\u53ef\u9009\u7684\u3002 [MPLS-ATM]\u548c[MPLS-LDP]\u4e2d\u89c4\u5b9a\u4e86\u73af\u8def\u68c0\u6d4b\u6280\u672f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.25\u3001 \u6807\u7b7e\u7f16\u7801<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e3a\u4e86\u4e0e\u6807\u7b7e\u5806\u6808\u6240\u5728\u7684\u6570\u636e\u5305\u4e00\u8d77\u4f20\u8f93\u6807\u7b7e\u5806\u6808\uff0c\u9700\u8981\u5b9a\u4e49\u6807\u7b7e\u5806\u6808\u7684\u5177\u4f53\u7f16\u7801\u3002\u8be5\u67b6\u6784\u652f\u6301\u591a\u79cd\u4e0d\u540c\u7684\u7f16\u7801\u6280\u672f\uff1b\u7f16\u7801\u6280\u672f\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u7528\u4e8e\u8f6c\u53d1\u6807\u8bb0\u6570\u636e\u5305\u7684\u7279\u5b9a\u7c7b\u578b\u7684\u8bbe\u5907\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.25.1\u3001 MPLS \u7279\u5b9a\u7684\u786c\u4ef6\u548c\/\u6216\u8f6f\u4ef6<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c\u4f7f\u7528\u7279\u5b9a\u4e8e MPLS \u7684\u786c\u4ef6\u548c\/\u6216\u8f6f\u4ef6\u6765\u8f6c\u53d1\u6807\u8bb0\u6570\u636e\u5305\uff0c\u5bf9\u6807\u8bb0\u5806\u6808\u8fdb\u884c\u7f16\u7801\u7684\u6700\u660e\u663e\u65b9\u6cd5\u662f\u5b9a\u4e49\u4e00\u79cd\u65b0\u534f\u8bae\uff0c\u7528\u4f5c\u6570\u636e\u94fe\u8def\u5c42\u548c\u7f51\u7edc\u5c42\u6807\u5934\u4e4b\u95f4\u7684\u201c\u586b\u5145\u201d\u3002\u8fd9\u4e2a shim \u5b9e\u9645\u4e0a\u53ea\u662f\u7f51\u7edc\u5c42\u6570\u636e\u5305\u7684\u5c01\u88c5\uff1b\u5b83\u5c06\u662f\u201c\u72ec\u7acb\u4e8e\u534f\u8bae\u7684\u201d\uff0c\u56e0\u6b64\u5b83\u53ef\u4ee5\u7528\u4e8e\u5c01\u88c5\u4efb\u4f55\u7f51\u7edc\u5c42\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06\u5176\u79f0\u4e3a\u201c\u901a\u7528 MPLS \u5c01\u88c5\u201d\u3002<\/p>\n
    \u901a\u7528 MPLS \u5c01\u88c5\u53c8\u5c06\u5c01\u88c5\u5728\u6570\u636e\u94fe\u8def\u5c42\u534f\u8bae\u4e2d\u3002<\/p>\n
    MPLS \u901a\u7528\u5c01\u88c5\u5728[MPLS-SHIM]\u4e2d\u89c4\u5b9a\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.25.2\u3001 ATM \u4ea4\u6362\u673a\u4f5c\u4e3a LSR<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cMPLS \u8f6c\u53d1\u8fc7\u7a0b\u7c7b\u4f3c\u4e8e\u4f20\u7edf\u201c\u6807\u7b7e\u4ea4\u6362\u201d\u4ea4\u6362\u673a\uff08\u4f8b\u5982 ATM \u4ea4\u6362\u673a\uff09\u7684\u8f6c\u53d1\u8fc7\u7a0b\u3002 ATM \u4ea4\u6362\u673a\u4f7f\u7528\u8f93\u5165\u7aef\u53e3\u548c\u8f93\u5165 VPI\/VCI \u503c\u4f5c\u4e3a\u7d22\u5f15\u5230\u201c\u4ea4\u53c9\u8fde\u63a5\u201d\u8868\u4e2d\uff0c\u5b83\u4eec\u4ece\u4e2d\u83b7\u5f97\u8f93\u51fa\u7aef\u53e3\u548c\u8f93\u51fa VPI\/VCI \u503c\u3002\u56e0\u6b64\uff0c\u5982\u679c\u4e00\u4e2a\u6216\u591a\u4e2a\u6807\u7b7e\u53ef\u4ee5\u76f4\u63a5\u7f16\u7801\u5230\u8fd9\u4e9b\u4f20\u7edf\u4ea4\u6362\u673a\u8bbf\u95ee\u7684\u5b57\u6bb5\u4e2d\uff0c\u90a3\u4e48\u4f20\u7edf\u4ea4\u6362\u673a\u53ef\u4ee5\u901a\u8fc7\u9002\u5f53\u7684\u8f6f\u4ef6\u5347\u7ea7\uff0c\u7528\u4f5c LSR\u3002\u6211\u4eec\u5c06\u6b64\u7c7b\u8bbe\u5907\u79f0\u4e3a\u201cATM-LSR\u201d\u3002<\/p>\n
    \u5728 ATM \u4fe1\u5143\u5934\u4e2d\u7f16\u7801\u6807\u7b7e\u6709\u4e09\u79cd\u660e\u663e\u7684\u65b9\u6cd5\uff08\u5047\u8bbe\u4f7f\u7528 AAL5\uff09\uff1a<\/p>\n
    1. SVC \u7f16\u7801<\/strong><\/p>\n
    \u4f7f\u7528 VPI\/VCI \u5b57\u6bb5\u5bf9\u4f4d\u4e8e\u6807\u7b7e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\u3002\u8be5\u6280\u672f\u53ef\u7528\u4e8e\u4efb\u4f55\u7f51\u7edc\u3002\u4f7f\u7528\u8fd9\u79cd\u7f16\u7801\u6280\u672f\uff0c\u6bcf\u4e2a LSP \u90fd\u88ab\u5b9e\u73b0\u4e3a\u4e00\u4e2a ATM SVC\uff0c\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u5c31\u53d8\u6210\u4e86 ATM\u201c\u4fe1\u4ee4\u201d\u534f\u8bae\u3002\u4f7f\u7528\u8fd9\u79cd\u7f16\u7801\u6280\u672f\uff0cATM-LSR \u4e0d\u80fd\u5728\u6807\u7b7e\u5806\u6808\u4e0a\u6267\u884c\u201c\u538b\u5165\u201d\u6216\u201c\u5f39\u51fa\u201d\u64cd\u4f5c\u3002<\/p>\n
    2. SVP \u7f16\u7801<\/strong><\/p>\n
    \u4f7f\u7528 VPI \u5b57\u6bb5\u5bf9\u4f4d\u4e8e\u6807\u7b7e\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\uff0c\u4f7f\u7528 VCI \u5b57\u6bb5\u5bf9\u5806\u6808\u4e2d\u7684\u7b2c\u4e8c\u4e2a\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\uff08\u5982\u679c\u5b58\u5728\uff09\u3002\u4e0e\u524d\u4e00\u79cd\u6280\u672f\u76f8\u6bd4\uff0c\u8fd9\u79cd\u6280\u672f\u6709\u4e00\u4e9b\u4f18\u70b9\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u4f7f\u7528 ATM\u201cVP \u4ea4\u6362\u201d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cLSP \u5b9e\u73b0\u4e3a ATM SVP\uff0c\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u4f5c\u4e3a ATM \u4fe1\u4ee4\u534f\u8bae\u3002<\/p>\n
    \u7136\u800c\uff0c\u8fd9\u79cd\u6280\u672f\u4e0d\u80fd\u603b\u662f\u88ab\u4f7f\u7528\u3002\u5982\u679c\u7f51\u7edc\u5305\u62ec\u901a\u8fc7\u975e MPLS ATM \u7f51\u7edc\u7684 ATM \u865a\u62df\u8def\u5f84\uff0c\u5219 VPI \u5b57\u6bb5\u4e0d\u4e00\u5b9a\u53ef\u4f9b MPLS \u4f7f\u7528\u3002<\/p>\n
    \u5f53\u4f7f\u7528\u8fd9\u79cd\u7f16\u7801\u6280\u672f\u65f6\uff0cVP \u51fa\u53e3\u5904\u7684 ATM-LSR \u6709\u6548\u5730\u6267\u884c\u201c\u5f39\u51fa\u201d\u64cd\u4f5c\u3002<\/p>\n
    3. SVP \u591a\u70b9\u7f16\u7801<\/strong><\/p>\n
    \u4f7f\u7528 VPI \u5b57\u6bb5\u5bf9\u4f4d\u4e8e\u6807\u7b7e\u6808\u9876\u90e8\u7684\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\uff0c\u4f7f\u7528 VCI \u5b57\u6bb5\u7684\u4e00\u90e8\u5206\u5bf9\u6808\u4e0a\u7684\u7b2c\u4e8c\u4e2a\u6807\u7b7e\u8fdb\u884c\u7f16\u7801\uff08\u5982\u679c\u5b58\u5728\uff09\uff0c\u5e76\u4f7f\u7528 VCI \u5b57\u6bb5\u7684\u5176\u4f59\u90e8\u5206\u6765\u6807\u8bc6 LSP\u5165\u53e3\u3002\u5982\u679c\u4f7f\u7528\u8fd9\u79cd\u6280\u672f\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u4f20\u7edf\u7684 ATM VP \u4ea4\u6362\u529f\u80fd\u6765\u63d0\u4f9b\u591a\u70b9\u5bf9\u70b9 VP\u3002\u6765\u81ea\u4e0d\u540c\u6570\u636e\u5305\u7684\u4fe1\u5143\u5c06\u643a\u5e26\u4e0d\u540c\u7684 VCI \u503c\u3002\u6b63\u5982\u6211\u4eec\u5c06\u5728 3.26 \u8282\u4e2d\u770b\u5230\u7684\uff0c\u8fd9\u4f7f\u6211\u4eec\u80fd\u591f\u5728\u53ef\u4ee5\u63d0\u4f9b\u591a\u70b9\u5bf9\u70b9 VP \u4f46\u4e0d\u5177\u6709 VC \u5408\u5e76\u80fd\u529b\u7684 ATM \u4ea4\u6362\u673a\u4e0a\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\uff0c\u800c\u4e0d\u4f1a\u9047\u5230\u4efb\u4f55\u4fe1\u5143\u4ea4\u7ec7\u95ee\u9898\u3002<\/p>\n
    \u8be5\u6280\u672f\u4f9d\u8d56\u4e8e\u5c06 16 \u4f4d VCI \u503c\u5206\u914d\u7ed9\u6bcf\u4e2a ATM \u4ea4\u6362\u673a\u7684\u80fd\u529b\u7684\u5b58\u5728\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u5c06\u5355\u4e2a VCI \u503c\u5206\u914d\u7ed9\u4e24\u4e2a\u4e0d\u540c\u7684\u4ea4\u6362\u673a\u3002 \uff08\u5982\u679c\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u4ea4\u6362\u673a\u5206\u914d\u8db3\u591f\u6570\u91cf\u7684\u6b64\u7c7b\u503c\uff0c\u5219\u8fd8\u53ef\u4ee5\u5c06 VCI \u503c\u89c6\u4e3a\u5806\u6808\u4e2d\u7684\u7b2c\u4e8c\u4e2a\u6807\u7b7e\u3002\uff09<\/p>\n
    \u5982\u679c\u5806\u6808\u4e0a\u7684\u6807\u7b7e\u591a\u4e8e ATM \u62a5\u6587\u5934\u4e2d\u53ef\u4ee5\u7f16\u7801\u7684\u6807\u7b7e\uff0c\u5219 ATM \u7f16\u7801\u5fc5\u987b\u4e0e\u901a\u7528\u5c01\u88c5\u76f8\u7ed3\u5408\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.25.3\u3001 \u7f16\u7801\u6280\u672f\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c<R1, R2, R3>\u662fLSP\u7684\u4e00\u4e2a\u6bb5\uff0c\u5219\u6709\u53ef\u80fdR1\u5728\u5411R2\u4f20\u8f93\u6570\u636e\u5305P\u65f6\u4f7f\u7528\u6807\u7b7e\u6808\u7684\u4e00\u79cd\u7f16\u7801\uff0c\u800c\u5728\u5411R3\u4f20\u8f93\u6570\u636e\u5305P\u65f6R2\u5c06\u4f7f\u7528\u4e0d\u540c\u7684\u7f16\u7801\u3002\u4e00\u822c\u800c\u8a00\uff0cMPLS \u67b6\u6784\u652f\u6301\u5728\u4e0d\u540c\u8dc3\u70b9\u4e0a\u4f7f\u7528\u4e0d\u540c\u6807\u7b7e\u6808\u7f16\u7801\u7684 LSP\u3002\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u8ba8\u8bba\u5904\u7406\u6807\u8bb0\u6570\u636e\u5305\u7684\u8fc7\u7a0b\u65f6\uff0c\u6211\u4eec\u62bd\u8c61\u5730\u8c08\u8bba\u5bf9\u6570\u636e\u5305\u7684\u6807\u7b7e\u5806\u6808\u8fdb\u884c\u64cd\u4f5c\u3002\u5f53\u63a5\u6536\u5230\u4e00\u4e2a\u5e26\u6807\u7b7e\u7684\u5305\u65f6\uff0cLSR \u5fc5\u987b\u5bf9\u5176\u8fdb\u884c\u89e3\u7801\u4ee5\u786e\u5b9a\u6807\u7b7e\u6808\u7684\u5f53\u524d\u503c\uff0c\u7136\u540e\u5fc5\u987b\u5bf9\u6807\u7b7e\u6808\u8fdb\u884c\u64cd\u4f5c\u4ee5\u786e\u5b9a\u6808\u7684\u65b0\u503c\uff0c\u7136\u540e\u5728\u4f20\u8f93\u5e26\u6807\u7b7e\u7684\u5305\u4e4b\u524d\u5bf9\u65b0\u503c\u8fdb\u884c\u9002\u5f53\u7684\u7f16\u7801\u5230\u5b83\u7684\u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u4e0d\u5e78\u7684\u662f\uff0cATM \u4ea4\u6362\u673a\u6ca1\u6709\u5c06\u4e00\u79cd\u7f16\u7801\u6280\u672f\u8f6c\u6362\u4e3a\u53e6\u4e00\u79cd\u7f16\u7801\u6280\u672f\u7684\u80fd\u529b\u3002\u56e0\u6b64\uff0cMPLS \u4f53\u7cfb\u7ed3\u6784\u8981\u6c42\uff0c\u53ea\u8981\u4e24\u4e2a ATM \u4ea4\u6362\u673a\u6709\u53ef\u80fd\u6210\u4e3a\u67d0\u4e2a\u6570\u636e\u5305\u7684\u7b2c m \u5c42 LSP \u4e0a\u7684\u8fde\u7eed LSR\uff0c\u90a3\u4e24\u4e2a ATM \u4ea4\u6362\u673a\u5c31\u4f7f\u7528\u76f8\u540c\u7684\u7f16\u7801\u6280\u672f\u3002<\/p>\n
    \u81ea\u7136\u4f1a\u6709 MPLS \u7f51\u7edc\u5305\u542b\u4f5c\u4e3a LSR \u8fd0\u884c\u7684 ATM \u4ea4\u6362\u673a\u548c\u4f7f\u7528 MPLS shim \u62a5\u6587\u5934\u8fd0\u884c\u7684\u5176\u4ed6 LSR \u7684\u7ec4\u5408\u3002\u5728\u8fd9\u6837\u7684\u7f51\u7edc\u4e2d\uff0c\u53ef\u80fd\u6709\u4e00\u4e9b LSR \u5177\u6709 ATM \u63a5\u53e3\u4ee5\u53ca\u201cMPLS Shim\u201d\u63a5\u53e3\u3002\u8fd9\u662f\u5728\u4e0d\u540c\u8dc3\u70b9\u4e0a\u5177\u6709\u4e0d\u540c\u6807\u7b7e\u5806\u6808\u7f16\u7801\u7684 LSR \u7684\u4e00\u4e2a\u793a\u4f8b\u3002\u8fd9\u6837\u7684 LSR \u53ef\u4ee5\u4ea4\u6362\u4f20\u5165\u63a5\u53e3\u4e0a\u7684 ATM \u7f16\u7801\u6807\u7b7e\u5806\u6808\uff0c\u5e76\u7528\u4f20\u51fa\u63a5\u53e3\u4e0a\u7684 MPLS \u586b\u5145\u5934\u7f16\u7801\u6807\u7b7e\u5806\u6808\u66ff\u6362\u5b83\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26\u3001 \u6807\u7b7e\u5408\u5e76<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe\u4e00\u4e2a LSR \u5c06\u591a\u4e2a\u4f20\u5165\u6807\u7b7e\u7ed1\u5b9a\u5230\u4e00\u4e2a\u7279\u5b9a\u7684 FEC\u3002\u5728\u8be5 FEC \u4e2d\u8f6c\u53d1\u6570\u636e\u5305\u65f6\uff0c\u4eba\u4eec\u5e0c\u671b\u6709\u4e00\u4e2a\u5e94\u7528\u4e8e\u6240\u6709\u6b64\u7c7b\u6570\u636e\u5305\u7684\u4f20\u51fa\u6807\u7b7e\u3002 FEC \u4e2d\u4e24\u4e2a\u4e0d\u540c\u7684\u6570\u636e\u5305\u4ee5\u4e0d\u540c\u7684\u4f20\u5165\u6807\u7b7e\u5230\u8fbe\u7684\u4e8b\u5b9e\u662f\u65e0\u5173\u7d27\u8981\u7684\uff1b\u4eba\u4eec\u5e0c\u671b\u4f7f\u7528\u76f8\u540c\u7684\u4f20\u51fa\u6807\u7b7e\u8f6c\u53d1\u5b83\u4eec\u3002\u8fd9\u6837\u505a\u7684\u80fd\u529b\u88ab\u79f0\u4e3a\u201c\u6807\u7b7e\u5408\u5e76\u201d\u3002<\/p>\n
    \u5047\u8bbe LSR \u80fd\u591f\u4ece\u4e0d\u540c\u7684\u4f20\u5165\u63a5\u53e3\u548c\/\u6216\u5177\u6709\u4e0d\u540c\u6807\u7b7e\u7684\u4e24\u4e2a\u6570\u636e\u5305\u63a5\u6536\u4e24\u4e2a\u6570\u636e\u5305\uff0c\u5e76\u5c06\u4e24\u4e2a\u6570\u636e\u5305\u4ee5\u76f8\u540c\u7684\u6807\u7b7e\u4ece\u540c\u4e00\u4e2a\u4f20\u51fa\u63a5\u53e3\u53d1\u9001\u51fa\u53bb\uff0c\u5219\u5b83\u80fd\u591f\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\u3002\u4e00\u65e6\u6570\u636e\u5305\u88ab\u4f20\u8f93\uff0c\u5b83\u4eec\u4ece\u4e0d\u540c\u63a5\u53e3\u548c\/\u6216\u5177\u6709\u4e0d\u540c\u4f20\u5165\u6807\u7b7e\u5230\u8fbe\u7684\u4fe1\u606f\u5c31\u4f1a\u4e22\u5931\u3002<\/p>\n
    \u5047\u8bbe\u5bf9\u4e8e\u6765\u81ea\u4e0d\u540c\u63a5\u53e3\u6216\u5177\u6709\u4e0d\u540c\u6807\u7b7e\u7684\u4efb\u4f55\u4e24\u4e2a\u6570\u636e\u5305\uff0c\u5982\u679c\u8fd9\u4e9b\u6570\u636e\u5305\u5fc5\u987b\u4ece\u4e0d\u540c\u7684\u63a5\u53e3\u53d1\u9001\u51fa\u53bb\uff0c\u6216\u8005\u5fc5\u987b\u5177\u6709\u4e0d\u540c\u7684\u6807\u7b7e\uff0c\u5219 LSR \u4e0d\u80fd\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\u3002\u4f7f\u7528 SVC \u6216 SVP \u7f16\u7801\u7684 ATM-LSR \u4e0d\u80fd\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\u3002\u8fd9\u5c06\u5728\u4e0b\u4e00\u8282\u4e2d\u66f4\u8be6\u7ec6\u5730\u8ba8\u8bba\u3002<\/p>\n
    \u5982\u679c\u67d0\u4e2a\u7279\u5b9a\u7684 LSR \u4e0d\u80fd\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\uff0c\u90a3\u4e48\u5982\u679c\u540c\u4e00 FEC \u4e2d\u7684\u4e24\u4e2a\u6570\u636e\u5305\u4ee5\u4e0d\u540c\u7684\u4f20\u5165\u6807\u7b7e\u5230\u8fbe\uff0c\u5219\u5b83\u4eec\u5fc5\u987b\u4ee5\u4e0d\u540c\u7684\u4f20\u51fa\u6807\u7b7e\u8f6c\u53d1\u3002\u4f7f\u7528\u6807\u7b7e\u5408\u5e76\uff0c\u6bcf\u4e2aFEC\u7684\u51fa\u6807\u7b7e\u6570\u91cf\u53ea\u9700\u4e3a1\uff1b\u5982\u679c\u6ca1\u6709\u6807\u7b7e\u5408\u5e76\uff0c\u6bcf\u4e2a FEC \u7684\u8f93\u51fa\u6807\u7b7e\u6570\u91cf\u53ef\u80fd\u4e0e\u7f51\u7edc\u4e2d\u7684\u8282\u70b9\u6570\u91cf\u4e00\u6837\u5927\u3002<\/p>\n
    \u901a\u8fc7\u6807\u7b7e\u5408\u5e76\uff0c\u7279\u5b9a LSR \u9700\u8981\u7684\u6bcf\u4e2a FEC \u7684\u4f20\u5165\u6807\u7b7e\u6570\u91cf\u6c38\u8fdc\u4e0d\u4f1a\u5927\u4e8e\u6807\u7b7e\u5206\u914d\u90bb\u63a5\u7684\u6570\u91cf\u3002\u5728\u6ca1\u6709\u6807\u7b7e\u5408\u5e76\u7684\u60c5\u51b5\u4e0b\uff0c\u7279\u5b9a LSR \u9700\u8981\u7684\u6bcf\u4e2a FEC \u7684\u4f20\u5165\u6807\u7b7e\u6570\u91cf\u4e0e\u5c06 FEC \u4e2d\u7684\u6d41\u91cf\u8f6c\u53d1\u5230\u76f8\u5173 LSR \u7684\u4e0a\u6e38\u8282\u70b9\u7684\u6570\u91cf\u4e00\u6837\u5927\u3002\u4e8b\u5b9e\u4e0a\uff0cLSR \u751a\u81f3\u5f88\u96be\u786e\u5b9a\u5b83\u5fc5\u987b\u4e3a\u7279\u5b9a FEC \u652f\u6301\u591a\u5c11\u8fd9\u6837\u7684\u4f20\u5165\u6807\u7b7e\u3002<\/p>\n
    MPLS \u4f53\u7cfb\u7ed3\u6784\u652f\u6301\u5408\u5e76\u548c\u975e\u5408\u5e76 LSR\uff0c\u4f46\u5141\u8bb8\u5b58\u5728\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\u7684 LSR\u3002\u8fd9\u5bfc\u81f4\u4e86\u786e\u4fdd\u5408\u5e76 LSR \u548c\u975e\u5408\u5e76 LSR \u4e4b\u95f4\u6b63\u786e\u4e92\u64cd\u4f5c\u7684\u95ee\u9898\u3002\u6570\u636e\u62a5\u5a92\u4ecb\u7684\u95ee\u9898\u4e0e ATM \u7684\u60c5\u51b5\u6709\u6240\u4e0d\u540c\u3002\u56e0\u6b64\u5c06\u5206\u522b\u8ba8\u8bba\u4e0d\u540c\u7684\u5a92\u4ecb\u7c7b\u578b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26.1\u3001 \u975e\u5408\u5e76 LSR<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    MPLS \u8f6c\u53d1\u8fc7\u7a0b\u4e0e ATM \u548c\u5e27\u4e2d\u7ee7\u7b49\u6280\u672f\u4f7f\u7528\u7684\u8f6c\u53d1\u8fc7\u7a0b\u975e\u5e38\u76f8\u4f3c\u3002\u5373\uff0c\u4e00\u4e2a\u6570\u636e\u5355\u5143\u5230\u8fbe\u540e\uff0c\u5728\u201c\u4ea4\u53c9\u8fde\u63a5\u8868\u201d\u4e2d\u67e5\u627e\u6807\u7b7e\uff08VPI\/VCI \u6216 DLCI\uff09\uff0c\u5728\u8be5\u67e5\u627e\u7684\u57fa\u7840\u4e0a\u9009\u62e9\u8f93\u51fa\u7aef\u53e3\uff0c\u5e76\u91cd\u5199\u6807\u7b7e\u503c\u3002\u4e8b\u5b9e\u4e0a\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u6837\u7684\u6280\u672f\u8fdb\u884c MPLS \u8f6c\u53d1\uff1b\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u53ef\u4ee5\u7528\u4f5c\u8bbe\u7f6e\u4ea4\u53c9\u8fde\u63a5\u8868\u7684\u201c\u4fe1\u4ee4\u534f\u8bae\u201d\u3002<\/p>\n
    \u4e0d\u5e78\u7684\u662f\uff0c\u8fd9\u4e9b\u6280\u672f\u4e0d\u4e00\u5b9a\u652f\u6301\u6807\u7b7e\u5408\u5e76\u529f\u80fd\u3002\u5728 ATM \u4e2d\uff0c\u5982\u679c\u5c1d\u8bd5\u6267\u884c\u6807\u7b7e\u5408\u5e76\uff0c\u7ed3\u679c\u53ef\u80fd\u662f\u6765\u81ea\u5404\u79cd\u6570\u636e\u5305\u7684\u4fe1\u5143\u4ea4\u9519\u3002\u5982\u679c\u6765\u81ea\u4e0d\u540c\u6570\u636e\u5305\u7684\u4fe1\u5143\u4ea4\u9519\uff0c\u5219\u65e0\u6cd5\u91cd\u65b0\u7ec4\u5408\u6570\u636e\u5305\u3002\u4e00\u4e9b\u5e27\u4e2d\u7ee7\u4ea4\u6362\u673a\u5728\u5176\u80cc\u677f\u4e0a\u4f7f\u7528\u4fe1\u5143\u4ea4\u6362\u3002\u8fd9\u4e9b\u4ea4\u6362\u673a\u4e5f\u53ef\u80fd\u65e0\u6cd5\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u51fa\u4e8e\u540c\u6837\u7684\u539f\u56e0\u2014\u2014\u4e0d\u540c\u6570\u636e\u5305\u7684\u4fe1\u5143\u53ef\u80fd\u4f1a\u4ea4\u9519\uff0c\u7136\u540e\u5c31\u65e0\u6cd5\u91cd\u65b0\u7ec4\u5408\u6570\u636e\u5305\u3002<\/p>\n
    \u6211\u4eec\u5efa\u8bae\u652f\u6301\u6b64\u95ee\u9898\u7684\u4e24\u79cd\u89e3\u51b3\u65b9\u6848\u3002\u9996\u5148\uff0cMPLS \u5c06\u5305\u542b\u5141\u8bb8\u4f7f\u7528\u975e\u5408\u5e76 LSR \u7684\u7a0b\u5e8f\u3002\u5176\u6b21\uff0cMPLS \u5c06\u652f\u6301\u5141\u8bb8\u67d0\u4e9b ATM \u4ea4\u6362\u673a\u5145\u5f53\u5408\u5e76 LSR \u7684\u7a0b\u5e8f\u3002<\/p>\n
    \u7531\u4e8e MPLS \u652f\u6301\u5408\u5e76\u548c\u975e\u5408\u5e76 LSR\uff0c\u56e0\u6b64 MPLS \u8fd8\u5305\u542b\u786e\u4fdd\u5b83\u4eec\u4e4b\u95f4\u6b63\u786e\u4e92\u64cd\u4f5c\u7684\u7a0b\u5e8f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26.2\u3001 \u5408\u5e76\u548c\u975e\u5408\u5e76 LSR \u7684\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u53ea\u9700\u8981\u53d1\u9001\u4e00\u4e2a\u652f\u6301\u6807\u7b7e\u5408\u5e76\u7684\u4e0a\u884cLSR<\/p>\n
    \u6bcf\u4e2a FEC \u4e00\u4e2a\u6807\u7b7e\u3002\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\u7684\u4e0a\u6e38\u90bb\u5c45\u9700\u8981\u4e3a\u6bcf\u4e2a FEC \u53d1\u9001\u591a\u4e2a\u6807\u7b7e\u3002\u4f46\u662f\uff0c\u65e0\u6cd5\u5148\u9a8c\u5730\u77e5\u9053\u5b83\u9700\u8981\u591a\u5c11\u4e2a\u6807\u7b7e\u3002\u8fd9\u5c06\u53d6\u51b3\u4e8e\u6709\u5173 FEC \u7684\u4e0a\u6e38\u6709\u591a\u5c11 LSR\u3002<\/p>\n
    \u5728 MPLS \u67b6\u6784\u4e2d\uff0c\u5982\u679c\u7279\u5b9a\u4e0a\u6e38\u90bb\u5c45\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u5219\u4e0d\u4f1a\u4e3a\u7279\u5b9a FEC \u53d1\u9001\u4efb\u4f55\u6807\u7b7e\uff0c\u9664\u975e\u5b83\u660e\u786e\u8981\u6c42\u8be5 FEC \u7684\u6807\u7b7e\u3002\u4e0a\u6e38\u90bb\u5c45\u53ef\u80fd\u4f1a\u53d1\u51fa\u591a\u6b21\u8fd9\u6837\u7684\u8bf7\u6c42\uff0c\u5e76\u4e14\u6bcf\u6b21\u90fd\u88ab\u8d4b\u4e88\u4e00\u4e2a\u65b0\u6807\u7b7e\u3002\u5f53\u4e0b\u6e38\u90bb\u5c45\u6536\u5230\u6765\u81ea\u4e0a\u6e38\u7684\u6b64\u7c7b\u8bf7\u6c42\uff0c\u800c\u4e0b\u6e38\u90bb\u5c45\u672c\u8eab\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\u65f6\uff0c\u5b83\u5fc5\u987b\u53cd\u8fc7\u6765\u5411\u5176\u4e0b\u6e38\u90bb\u5c45\u8be2\u95ee\u6709\u5173 FEC \u7684\u53e6\u4e00\u4e2a\u6807\u7b7e\u3002<\/p>\n
    \u53ef\u80fd\u6709\u4e00\u4e9b\u8282\u70b9\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u4f46\u53ea\u80fd\u5c06\u6709\u9650\u6570\u91cf\u7684\u4f20\u5165\u6807\u7b7e\u5408\u5e76\u4e3a\u5355\u4e2a\u4f20\u51fa\u6807\u7b7e\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u7531\u4e8e\u67d0\u4e9b\u786c\u4ef6\u9650\u5236\uff0c\u4e00\u4e2a\u8282\u70b9\u80fd\u591f\u5c06\u56db\u4e2a\u4f20\u5165\u6807\u7b7e\u5408\u5e76\u4e3a\u4e00\u4e2a\u4f20\u51fa\u6807\u7b7e\u3002\u7136\u800c\uff0c\u5047\u8bbe\u8fd9\u4e2a\u7279\u5b9a\u8282\u70b9\u6709\u516d\u4e2a\u4f20\u5165\u6807\u7b7e\u5230\u8fbe\u5b83\uff0c\u7528\u4e8e\u7279\u5b9a FEC\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8be5\u8282\u70b9\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5408\u5e76\u4e3a\u4e24\u4e2a\u4f20\u51fa\u6807\u7b7e\u3002<\/p>\n
    \u6807\u7b7e\u5408\u5e76\u662f\u5426\u9002\u7528\u4e8e\u663e\u5f0f\u8def\u7531\u7684 LSP \u6709\u5f85\u8fdb\u4e00\u6b65\u7814\u7a76\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26.3\u3001 \u901a\u8fc7 ATM \u5408\u5e76<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26.3.1\u3001 \u6d88\u9664\u4fe1\u5143\u4ea4\u9519\u7684\u65b9\u6cd5<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u7528\u4e8e\u6d88\u9664 ATM \u4e2d\u7684\u4fe1\u5143\u4ea4\u7ec7\u95ee\u9898\uff0c\u4ece\u800c\u4f7f ATM \u4ea4\u6362\u673a\u652f\u6301\u6d41\u5408\u5e76\uff1a<\/p>\n
    1. VP\u5408\u5e76\uff0c\u4f7f\u7528SVP Multipoint Encoding<\/strong><\/p>\n
    \u4f7f\u7528VP\u5408\u5e76\u65f6\uff0c\u5c06\u591a\u6761\u865a\u8def\u5f84\u5408\u5e76\u4e3a\u4e00\u6761\u865a\u8def\u5f84\uff0c\u4f46\u5728VP\u5185\u4f7f\u7528\u4e0d\u540c\u7684VCI\u533a\u5206\u4e0d\u540c\u6765\u6e90\u7684\u62a5\u6587\u3002<\/p>\n
    2. VC\u5408\u5e76<\/strong><\/p>\n
    \u5f53\u4f7f\u7528 VC \u5408\u5e76\u65f6\uff0c\u4ea4\u6362\u673a\u9700\u8981\u7f13\u51b2\u6765\u81ea\u4e00\u4e2a\u6570\u636e\u5305\u7684\u4fe1\u5143\uff0c\u76f4\u5230\u63a5\u6536\u5230\u6574\u4e2a\u6570\u636e\u5305\uff08\u8fd9\u53ef\u4ee5\u901a\u8fc7\u67e5\u627e AAL5 \u5e27\u7ed3\u675f\u6307\u793a\u7b26\u6765\u786e\u5b9a\uff09\u3002<\/p>\n
    VP \u5408\u5e76\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u4e0e\u66f4\u9ad8\u767e\u5206\u6bd4\u7684\u73b0\u6709 ATM \u4ea4\u6362\u673a\u5b9e\u73b0\u517c\u5bb9\u3002\u8fd9\u4f7f\u5f97VP\u5408\u5e76\u66f4\u6709\u53ef\u80fd\u5728\u73b0\u6709\u7f51\u7edc\u4e2d\u4f7f\u7528\u3002\u4e0e VC \u5408\u5e76\u4e0d\u540c\uff0cVP \u5408\u5e76\u4e0d\u4f1a\u5728\u5408\u5e76\u70b9\u4ea7\u751f\u4efb\u4f55\u5ef6\u8fdf\uff0c\u4e5f\u4e0d\u4f1a\u5f3a\u52a0\u4efb\u4f55\u7f13\u51b2\u533a\u8981\u6c42\u3002\u4f46\u662f\uff0c\u5b83\u7684\u7f3a\u70b9\u662f\u9700\u8981\u534f\u8c03\u6bcf\u4e2a VP \u5185\u7684 VCI \u7a7a\u95f4\u3002\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u9009\u62e9\u4e00\u79cd\u6216\u591a\u79cd\u65b9\u6cd5\u6709\u5f85\u8fdb\u4e00\u6b65\u7814\u7a76\u3002<\/p>\n
    \u4e0e\u73b0\u6709\u8bbe\u5907\u7684\u517c\u5bb9\u6027\u4e0e\u534f\u8bae\u590d\u6742\u6027\u548c\u53ef\u6269\u5c55\u6027\u4e4b\u95f4\u7684\u8fd9\u79cd\u6743\u8861\u610f\u5473\u7740 MPLS \u534f\u8bae\u9700\u8981\u652f\u6301 VP \u5408\u5e76\u548c VC \u5408\u5e76\u3002\u4e3a\u4e86\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u53c2\u4e0e MPLS \u7684\u6bcf\u4e2a ATM \u4ea4\u6362\u673a\u9700\u8981\u77e5\u9053\u5b83\u7684\u76f4\u63a5 ATM \u90bb\u5c45\u662f\u6267\u884c VP \u5408\u5e76\u3001VC \u5408\u5e76\u8fd8\u662f\u4e0d\u5408\u5e76\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.26.3.2\u3001 \u4e92\u64cd\u4f5c\uff1aVC Merge\u3001VP Merge\u548cNon-Merge<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u901a\u8fc7\u9996\u5148\u63cf\u8ff0 VC \u5408\u5e76\u4e0e\u975e\u5408\u5e76\u7684\u4e92\u64cd\u4f5c\uff0c\u6700\u5bb9\u6613\u63cf\u8ff0 ATM \u4e0a\u5404\u79cd\u5408\u5e76\u5f62\u5f0f\u7684\u4e92\u64cd\u4f5c\u3002<\/p>\n
    \u5728 VC \u5408\u5e76\u8282\u70b9\u548c\u975e\u5408\u5e76\u8282\u70b9\u4e92\u8fde\u7684\u60c5\u51b5\u4e0b\uff0c\u4fe1\u5143\u7684\u8f6c\u53d1\u5728\u6240\u6709\u60c5\u51b5\u4e0b\u90fd\u57fa\u4e8e VC\uff08\u5373 VPI \u548c VCI \u7684\u4e32\u8054\uff09\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u8282\u70b9\uff0c\u5982\u679c\u4e0a\u6e38\u90bb\u5c45\u6b63\u5728\u6267\u884c VC \u5408\u5e76\uff0c\u90a3\u4e48\u8be5\u4e0a\u6e38\u90bb\u5c45\u4ec5\u9700\u8981\u4e00\u4e2a\u7279\u5b9a\u6d41\u7684\u5355\u4e2a VPI\/VCI\uff08\u8fd9\u7c7b\u4f3c\u4e8e\u5728\u5e27\u5a92\u4ecb\u4e0a\u64cd\u4f5c\u7684\u60c5\u51b5\u4e0b\u5bf9\u5355\u4e2a\u6807\u7b7e\u7684\u8981\u6c42\uff09\u3002\u5982\u679c\u4e0a\u6e38\u90bb\u5c45\u6ca1\u6709\u8fdb\u884c\u5408\u5e76\uff0c\u90a3\u4e48\u90bb\u5c45\u5c06\u9700\u8981\u6bcf\u4e2a\u6d41\u7684\u5355\u4e2a VPI\/VCI \u4ee5\u53ca\u8db3\u591f\u7684 VPI\/VCI \u4ee5\u4f20\u9012\u7ed9\u5176\u4e0a\u6e38\u90bb\u5c45\u3002\u6240\u9700\u7684\u6570\u91cf\u5c06\u901a\u8fc7\u5141\u8bb8\u4e0a\u6e38\u8282\u70b9\u4ece\u5176\u4e0b\u6e38\u90bb\u5c45\u8bf7\u6c42\u989d\u5916\u7684 VPI\/VCI \u6765\u786e\u5b9a\uff08\u8fd9\u518d\u6b21\u7c7b\u4f3c\u4e8e\u5e27\u5408\u5e76\u4f7f\u7528\u7684\u65b9\u6cd5\uff09\u3002<\/p>\n
    \u7c7b\u4f3c\u7684\u65b9\u6cd5\u53ef\u4ee5\u652f\u6301\u6267\u884c VP \u5408\u5e76\u7684\u8282\u70b9\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cVP \u5408\u5e76\u8282\u70b9\u4e0d\u662f\u4ece\u5176\u4e0b\u6e38\u90bb\u5c45\u8bf7\u6c42\u5355\u4e2a VPI\/VCI \u6216\u591a\u4e2a VPI\/VCI\uff0c\u800c\u662f\u53ef\u4ee5\u8bf7\u6c42\u5355\u4e2a VP\uff08\u7531 VPI \u6807\u8bc6\uff09\u4f46\u5728 VP \u5185\u8bf7\u6c42\u591a\u4e2a VCI\u3002\u6b64\u5916\uff0c\u5047\u8bbe\u4e00\u4e2a\u975e\u5408\u5e76\u8282\u70b9\u4f4d\u4e8e\u4e24\u4e2a\u4e0d\u540c\u7684 VP \u5408\u5e76\u8282\u70b9\u7684\u4e0b\u6e38\u3002\u8be5\u8282\u70b9\u53ef\u80fd\u9700\u8981\u8bf7\u6c42\u4e00\u4e2a VPI\/VCI\uff08\u7528\u4e8e\u6765\u81ea\u5176\u81ea\u8eab\u7684\u6d41\u91cf\uff09\u52a0\u4e0a\u4e24\u4e2a VP\uff08\u6bcf\u4e2a\u4e0a\u6e38\u8282\u70b9\u4e00\u4e2a\uff09\uff0c\u6bcf\u4e2a\u90fd\u4e0e\u4e00\u7ec4\u6307\u5b9a\u7684 VCI\uff08\u6839\u636e\u4e0a\u6e38\u8282\u70b9\u7684\u8bf7\u6c42\uff09\u76f8\u5173\u8054\u3002<\/p>\n
    \u4e3a\u4e86\u652f\u6301\u6240\u6709\u7684VP\u5408\u5e76\u3001VC\u5408\u5e76\u548c\u975e\u5408\u5e76\uff0c\u56e0\u6b64\u9700\u8981\u5141\u8bb8\u4e0a\u6e38\u8282\u70b9\u8bf7\u6c42\u96f6\u4e2a\u6216\u591a\u4e2aVC\u6807\u8bc6\u7b26\u7684\u7ec4\u5408\uff08\u7531VPI\/VCI\u7ec4\u6210\uff09\uff0c\u52a0\u4e0a\u96f6\u4e2a\u6216\u591a\u4e2aVP\uff08\u7531 VPI \u6807\u8bc6\uff09\uff0c\u6bcf\u4e2a\u5305\u542b\u6307\u5b9a\u6570\u91cf\u7684 VC\uff08\u7531\u4e00\u7ec4\u5728 VP \u4e2d\u91cd\u8981\u7684 VCI \u6807\u8bc6\uff09\u3002\u56e0\u6b64\uff0cVP \u5408\u5e76\u8282\u70b9\u5c06\u8bf7\u6c42\u4e00\u4e2a VP\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u7528\u4e8e\u5b83\u53d1\u8d77\u7684\u6d41\u91cf\u7684 VCI\uff08\u5982\u679c\u5408\u9002\uff09\u52a0\u4e0a\u4ece\u4e0a\u9762\u8bf7\u6c42\u7684\u6bcf\u4e2a VC \u7684 VCI\uff08\u65e0\u8bba VC \u662f\u5426\u662f\u5305\u542b VP \u7684\u4e00\u90e8\u5206\uff09\u3002 VC \u5408\u5e76\u8282\u70b9\u5c06\u4ec5\u8bf7\u6c42\u5355\u4e2a VPI\/VCI\uff08\u56e0\u4e3a\u5b83\u4eec\u53ef\u4ee5\u5c06\u6240\u6709\u4e0a\u6e38\u6d41\u91cf\u5408\u5e76\u4e3a\u5355\u4e2a VC\uff09\u3002\u975e\u5408\u5e76\u8282\u70b9\u5c06\u4f20\u9012\u5b83\u4eec\u4ece\u4e0a\u9762\u83b7\u5f97\u7684\u4efb\u4f55\u8bf7\u6c42\uff0c\u5e76\u4e3a\u5b83\u4eec\u53d1\u8d77\u7684\u6d41\u91cf\u8bf7\u6c42 VPI\/VCI\uff08\u5982\u679c\u9002\u7528\uff09\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27\u3001 \u96a7\u9053\u548c\u5c42\u6b21\u7ed3\u6784<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6709\u65f6\uff0c\u8def\u7531\u5668 Ru \u4f1a\u91c7\u53d6\u663e\u5f0f\u64cd\u4f5c\uff0c\u4f7f\u7279\u5b9a\u6570\u636e\u5305\u4f20\u9001\u5230\u53e6\u4e00\u4e2a\u8def\u7531\u5668 Rd\uff0c\u5373\u4f7f Ru \u548c Rd \u4e0d\u662f\u8be5\u6570\u636e\u5305\u7684\u9010\u8df3\u8def\u5f84\u4e0a\u7684\u8fde\u7eed\u8def\u7531\u5668\uff0c\u5e76\u4e14 Rd \u4e5f\u4e0d\u662f\u6570\u636e\u5305\u7684\u6700\u7ec8\u76ee\u7684\u5730\u3002\u4f8b\u5982\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5c06\u6570\u636e\u5305\u5c01\u88c5\u5728\u76ee\u6807\u5730\u5740\u662f Rd \u672c\u8eab\u5730\u5740\u7684\u7f51\u7edc\u5c42\u6570\u636e\u5305\u4e2d\u6765\u5b8c\u6210\u3002\u8fd9\u5c06\u521b\u5efa\u4e00\u6761\u4ece Ru \u5230 Rd \u7684\u201c\u96a7\u9053\u201d\u3002\u6211\u4eec\u5c06\u4efb\u4f55\u8fd9\u6837\u5904\u7406\u7684\u6570\u636e\u5305\u79f0\u4e3a\u201c\u96a7\u9053\u6570\u636e\u5305\u201d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27.1\u3001 \u9010\u8df3\u8def\u7531\u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c\u96a7\u9053\u5206\u7ec4\u9075\u5faa\u4ece Ru \u5230 Rd \u7684\u9010\u8df3\u8def\u5f84\uff0c\u6211\u4eec\u8bf4\u5b83\u5728\u201c\u53d1\u9001\u7aef\u70b9\u201d\u4e3a Ru \u4e14\u201c\u63a5\u6536\u7aef\u70b9\u201d\u4e3a Rd \u7684\u201c\u9010\u8df3\u8def\u7531\u96a7\u9053\u201d\u4e2d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27.2\u3001 \u663e\u5f0f\u8def\u7531\u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c\u96a7\u9053\u6570\u636e\u5305\u901a\u8fc7\u9664\u9010\u8df3\u8def\u5f84\u4e4b\u5916\u7684\u8def\u5f84\u4ece Ru \u4f20\u64ad\u5230 Rd\uff0c\u6211\u4eec\u8bf4\u5b83\u4f4d\u4e8e\u201c\u663e\u5f0f\u8def\u7531\u96a7\u9053\u201d\u4e2d\uff0c\u5176\u201c\u53d1\u9001\u7aef\u70b9\u201d\u4e3a Ru\uff0c\u5176\u201c\u63a5\u6536\u7aef\u70b9\u201d\u4e3a Rd\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u6570\u636e\u5305\u5c01\u88c5\u5728\u6e90\u8def\u7531\u7684\u6570\u636e\u5305\u4e2d\u6765\u901a\u8fc7\u663e\u5f0f\u8def\u7531\u96a7\u9053\u53d1\u9001\u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27.3\u3001 LSP\u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u53ef\u4ee5\u5c06\u96a7\u9053\u5b9e\u73b0\u4e3aLSP\uff0c\u4f7f\u7528\u6807\u7b7e\u4ea4\u6362\u800c\u4e0d\u662f\u7f51\u7edc\u5c42\u5c01\u88c5\uff0c\u4f7f\u6570\u636e\u5305\u901a\u8fc7\u96a7\u9053\u3002\u96a7\u9053\u5c06\u662f LSP <R1, …, Rn>\uff0c\u5176\u4e2d R1 \u662f\u96a7\u9053\u7684\u53d1\u9001\u7aef\u70b9\uff0cRn \u662f\u96a7\u9053\u7684\u63a5\u6536\u7aef\u70b9\u3002\u8fd9\u79f0\u4e3a\u201cLSP \u96a7\u9053\u201d\u3002<\/p>\n
    \u8981\u901a\u8fc7 LSP \u96a7\u9053\u53d1\u9001\u7684\u4e00\u7ec4\u6570\u636e\u5305\u6784\u6210\u4e00\u4e2a FEC\uff0c\u96a7\u9053\u4e2d\u7684\u6bcf\u4e2a LSR \u5fc5\u987b\u4e3a\u8be5 FEC \u5206\u914d\u4e00\u4e2a\u6807\u7b7e\uff08\u5373\uff0c\u5fc5\u987b\u4e3a\u96a7\u9053\u5206\u914d\u4e00\u4e2a\u6807\u7b7e\uff09\u3002\u5c06\u7279\u5b9a\u6570\u636e\u5305\u5206\u914d\u7ed9 LSP \u96a7\u9053\u7684\u6807\u51c6\u662f\u96a7\u9053\u4f20\u8f93\u7aef\u70b9\u7684\u672c\u5730\u4e8b\u52a1\u3002\u4e3a\u4e86\u5c06\u6570\u636e\u5305\u653e\u5165 LSP \u96a7\u9053\uff0c\u4f20\u8f93\u7aef\u70b9\u5c06\u96a7\u9053\u7684\u6807\u7b7e\u538b\u5165\u5230\u6807\u7b7e\u5806\u6808\u4e0a\uff0c\u5e76\u5c06\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\u53d1\u9001\u5230\u96a7\u9053\u4e2d\u7684\u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u5982\u679c\u96a7\u9053\u7684\u63a5\u6536\u7aef\u70b9\u4e0d\u9700\u8981\u80fd\u591f\u786e\u5b9a\u5b83\u901a\u8fc7\u96a7\u9053\u63a5\u6536\u54ea\u4e9b\u6570\u636e\u5305\uff0c\u5982\u524d\u6240\u8ff0\uff0c\u6807\u7b7e\u5806\u6808\u53ef\u80fd\u4f1a\u5728\u96a7\u9053\u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u5904\u5f39\u51fa\u3002<\/p>\n
    \u201c\u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\u201d\u662f\u4f5c\u4e3a\u53d1\u9001\u7aef\u70b9\u548c\u63a5\u6536\u7aef\u70b9\u4e4b\u95f4\u7684\u9010\u8df3\u8def\u7531 LSP \u5b9e\u73b0\u7684\u96a7\u9053\u3002<\/p>\n
    \u201cExplicitly Routed LSP Tunnel\u201d\u662fLSP Tunnel\uff0c\u4e5f\u662fExplicitly Routed LSP\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27.4\u3001 \u5c42\u6b21\u7ed3\u6784\uff1aLSP \u5185\u7684 LSP \u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8003\u8651\u4e00\u4e2a LSP <R1, R2, R3, R4>\u3002\u8ba9\u6211\u4eec\u5047\u8bbe R1 \u6536\u5230\u672a\u6807\u8bb0\u7684\u6570\u636e\u5305 P\uff0c\u5e76\u5c06\u6807\u7b7e\u538b\u5165\u5176\u6807\u7b7e\u5806\u6808\uff0c\u4f7f\u5176\u9075\u5faa\u8fd9\u6761\u8def\u5f84\uff0c\u8fd9\u5b9e\u9645\u4e0a\u662f\u9010\u8df3\u8def\u5f84\u3002\u7136\u800c\uff0c\u8ba9\u6211\u4eec\u8fdb\u4e00\u6b65\u5047\u8bbe R2 \u548c R3 \u6ca1\u6709\u76f4\u63a5\u8fde\u63a5\uff0c\u800c\u662f\u7531\u4e8e\u662f LSP \u96a7\u9053\u7684\u7aef\u70b9\u800c\u6210\u4e3a\u201c\u90bb\u5c45\u201d\u3002\u6240\u4ee5 P \u904d\u5386\u7684 LSR \u7684\u5b9e\u9645\u5e8f\u5217\u662f <R1, R2, R21, R22, R23, R3, R4>\u3002<\/p>\n
    \u5f53 P \u4ece R1 \u5230 R2 \u65f6\uff0c\u5b83\u4f1a\u6709\u4e00\u4e2a\u6df1\u5ea6\u4e3a 1 \u7684\u6807\u7b7e\u6808\u3002 R2 \u6253\u5f00\u6807\u7b7e\uff0c\u786e\u5b9a P \u5fc5\u987b\u8fdb\u5165\u96a7\u9053\u3002 R2 \u9996\u5148\u7528\u5bf9 R3 \u6709\u610f\u4e49\u7684\u6807\u7b7e\u66ff\u6362 Incoming \u6807\u7b7e\u3002\u7136\u540e\u5b83\u538b\u5165\u4e00\u4e2a\u65b0\u6807\u7b7e\u3002\u6b64\u7ea7\u522b 2 \u6807\u7b7e\u5177\u6709\u5bf9 R21 \u6709\u610f\u4e49\u7684\u503c\u3002\u4ea4\u6362\u7531 R21\u3001R22\u3001R23 \u5728 2 \u7ea7\u6807\u7b7e\u4e0a\u5b8c\u6210\u3002 R23 \u662f R2-R3 \u96a7\u9053\u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u8df3\uff0c\u5728\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230 R3 \u4e4b\u524d\u5f39\u51fa\u6807\u7b7e\u5806\u6808\u3002\u5f53 R3 \u770b\u5230\u6570\u636e\u5305 P \u65f6\uff0cP \u53ea\u6709\u4e00\u4e2a 1 \u7ea7\u6807\u7b7e\uff0c\u73b0\u5728\u5df2\u7ecf\u9000\u51fa\u4e86\u96a7\u9053\u3002\u7531\u4e8e R3 \u662f P \u7684\u7b2c 1 \u7ea7 LSP \u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u8df3\uff0c\u5b83\u5f39\u51fa\u6807\u7b7e\u5806\u6808\uff0cR4 \u63a5\u6536\u672a\u6807\u8bb0\u7684 P\u3002<\/p>\n
    \u6807\u7b7e\u5806\u6808\u673a\u5236\u5141\u8bb8 LSP \u96a7\u9053\u5d4c\u5957\u5230\u4efb\u4f55\u6df1\u5ea6\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.27.5\u3001 \u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u548c\u5c42\u6b21\u7ed3\u6784<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe\u6570\u636e\u5305P\u6cbfLevel 1 LSP<R1, R2, R3, R4>\u4f20\u8f93\uff0c\u5f53\u4eceR2\u5230R3\u65f6\uff0c\u6cbfLevel 2 LSP<R2, R21, R22, R3>\u4f20\u8f93\u3002\u4eceLevel 2 LSP\u7684\u89d2\u5ea6\u6765\u770b\uff0cR2\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u662fR21\u3002\u4eceLevel 1 LSP\u7684\u89d2\u5ea6\u6765\u770b\uff0cR2\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u662fR1\u548cR3\u3002\u53ef\u4ee5\u5728\u5c42\u6b21\u7ed3\u6784\u7684\u6bcf\u4e00\u5c42\u90fd\u6709\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u70b9\u3002\u6211\u4eec\u5c06\u5728 4.6 \u548c 4.7 \u8282\u4e2d\u770b\u5230\u4e00\u4e9b\u4f7f\u7528\u8fd9\u79cd\u5c42\u6b21\u7ed3\u6784\u7684\u65b9\u6cd5\u3002\u8bf7\u6ce8\u610f\uff0c\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cR2 \u548c R21 \u5fc5\u987b\u662f IGP \u90bb\u5c45\uff0c\u4f46 R2 \u548c R3 \u4e0d\u5fc5\u662f\u3002<\/p>\n
    \u5f53\u4e24\u4e2a LSR \u662f IGP \u90bb\u5c45\u65f6\uff0c\u6211\u4eec\u5c06\u5b83\u4eec\u79f0\u4e3a\u201c\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u201d\u3002\u5f53\u4e24\u4e2a LSR \u53ef\u80fd\u662f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u4f46\u4e0d\u662f IGP \u90bb\u5c45\u65f6\uff0c\u6211\u4eec\u5c06\u5b83\u4eec\u79f0\u4e3a\u201c\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u201d\u3002\u5728\u4e0a\u4f8b\u4e2d\uff0cR2 \u548c R21 \u662f\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u800c R2 \u548c R3 \u662f\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002<\/p>\n
    MPLS \u67b6\u6784\u652f\u6301\u4e24\u79cd\u5728\u5c42\u6b21\u7ed3\u6784\u7684\u4e0d\u540c\u5c42\u5206\u914d\u6807\u7b7e\u7684\u65b9\u6cd5\uff1a\u663e\u5f0f\u5bf9\u7b49\u4e92\u8fde\u548c\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde\u3002<\/p>\n
    \u4e00\u79cd\u901a\u8fc7\u53d1\u9001\u5bfb\u5740\u5230\u5bf9\u7b49\u4f53\u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6d88\u606f\u4e0e\u81ea\u5df1\u7684\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u6267\u884c\u6807\u7b7e\u5206\u53d1\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u4e4b\u4e00\u4e0e\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u6267\u884c\u6807\u7b7e\u5206\u53d1\uff1a<\/p>\n
    1. \u663e\u5f0f\u5bf9\u7b49\u4e92\u8fde<\/strong><\/p>\n
    \u5728\u663e\u5f0f\u5bf9\u7b49\u4e92\u8fde\u4e2d\uff0c\u901a\u8fc7\u5411\u5bf9\u7b49\u65b9\u53d1\u9001\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6d88\u606f\u6765\u5411\u5bf9\u7b49\u65b9\u5206\u53d1\u6807\u7b7e\uff0c\u8fd9\u4e0e\u5bf9\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u6240\u505a\u7684\u5b8c\u5168\u4e00\u6837\u3002\u5f53\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u7684\u6570\u91cf\u5f88\u5c11\uff0c\u6216\u8005\u66f4\u9ad8\u7ea7\u522b\u6807\u7b7e\u7ed1\u5b9a\u7684\u6570\u91cf\u5f88\u5927\uff0c\u6216\u8005\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u4f4d\u4e8e\u4e0d\u540c\u7684\u8def\u7531\u533a\u57df\u6216\u57df\u4e2d\u65f6\uff0c\u8fd9\u79cd\u6280\u672f\u6700\u6709\u7528\u3002\u5f53\u7136\uff0c\u9700\u8981\u77e5\u9053\u54ea\u4e9b\u6807\u7b7e\u5206\u53d1\u7ed9\u54ea\u4e9bpeer\uff1b\u8fd9\u5728\u7b2c 4.1.2 \u8282\u4e2d\u89e3\u51b3\u3002<\/p>\n
    \u5728 4.2.1 \u548c 4.6 \u8282\u4e2d\u53ef\u4ee5\u627e\u5230\u4f7f\u7528\u663e\u5f0f\u5bf9\u7b49\u4e92\u8fde\u7684\u793a\u4f8b\u3002<\/p>\n
    2. \u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde<\/strong><\/p>\n
    \u5728\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde\u4e2d\uff0c\u4e0d\u53d1\u9001\u5bfb\u5740\u5230\u5bf9\u7b49\u4f53\u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6d88\u606f\u3002\u76f8\u53cd\uff0c\u4e3a\u4e86\u5c06\u66f4\u9ad8\u7ea7\u522b\u7684\u6807\u7b7e\u5206\u53d1\u7ed9\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\uff0c\u5c06\u66f4\u9ad8\u7ea7\u522b\u7684\u6807\u7b7e\u7f16\u7801\u4e3a\u8f83\u4f4e\u7ea7\u522b\u6807\u7b7e\u7684\u5c5e\u6027\uff0c\u7136\u540e\u5c06\u8f83\u4f4e\u7ea7\u522b\u7684\u6807\u7b7e\u4e0e\u8be5\u5c5e\u6027\u4e00\u8d77\u5206\u53d1\u7ed9\u81ea\u5df1\u7684\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u3002\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u7136\u540e\u5c06\u4fe1\u606f\u4f20\u64ad\u5230\u5b83\u4eec\u7684\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u4e00\u76f4\u6301\u7eed\u5230\u4fe1\u606f\u5230\u8fbe\u8fdc\u7a0b\u5bf9\u7b49\u65b9\u3002<\/p>\n
    \u5f53\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u70b9\u7684\u6570\u91cf\u5f88\u5927\u65f6\uff0c\u6b64\u6280\u672f\u6700\u6709\u7528\u3002\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde\u4e0d\u9700\u8981 n \u65b9\u5bf9\u7b49\u4e92\u8fde\u7f51\u683c\u6765\u5c06\u6807\u7b7e\u5206\u53d1\u5230\u8fdc\u7a0b\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\uff0c\u56e0\u4e3a\u4fe1\u606f\u662f\u901a\u8fc7\u672c\u5730\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4e92\u8fde\u4f20\u9001\u7684\u3002\u4f46\u662f\uff0c\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde\u8981\u6c42\u4e2d\u95f4\u8282\u70b9\u5b58\u50a8\u5b83\u4eec\u53ef\u80fd\u4e0d\u76f4\u63a5\u611f\u5174\u8da3\u7684\u4fe1\u606f\u3002<\/p>\n
    \u7b2c 4.3 \u8282\u4e2d\u63d0\u4f9b\u4e86\u4f7f\u7528\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde\u7684\u793a\u4f8b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.28\u3001 \u6807\u7b7e\u5206\u53d1\u534f\u8bae\u4f20\u8f93<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    MPLS \u7f51\u7edc\u4e2d\u7684\u8282\u70b9\u4e4b\u95f4\u4f7f\u7528\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6765\u5efa\u7acb\u548c\u7ef4\u62a4\u6807\u7b7e\u7ed1\u5b9a\u3002\u4e3a\u4e86\u4f7f MPLS \u6b63\u786e\u8fd0\u884c\uff0c\u9700\u8981\u53ef\u9760\u5730\u4f20\u8f93\u6807\u7b7e\u5206\u53d1\u4fe1\u606f\uff0c\u5e76\u4e14\u9700\u8981\u6309\u987a\u5e8f\u4f20\u8f93\u5c5e\u4e8e\u7279\u5b9a FEC \u7684\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6d88\u606f\u3002\u6d41\u91cf\u63a7\u5236\u4e5f\u662f\u53ef\u53d6\u7684\uff0c\u56e0\u4e3a\u5b83\u5177\u6709\u5728\u5355\u4e2a\u6570\u636e\u62a5\u4e2d\u643a\u5e26\u591a\u4e2a\u6807\u7b7e\u6d88\u606f\u7684\u80fd\u529b\u3002<\/p>\n
    \u5b9e\u73b0\u8fd9\u4e9b\u76ee\u6807\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528 TCP \u4f5c\u4e3a\u5e95\u5c42\u4f20\u8f93\uff0c\u5c31\u50cf\u5728 [MPLS-LDP] \u548c [MPLS-BGP] \u4e2d\u6240\u505a\u7684\u90a3\u6837\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.29\u3001 \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u591a\u6807\u7b7e\u5206\u53d1\u534f\u8bae\uff1f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8be5\u4f53\u7cfb\u7ed3\u6784\u6ca1\u6709\u5efa\u7acb\u786c\u6027\u89c4\u5219\u6765\u9009\u62e9\u5728\u4f55\u79cd\u60c5\u51b5\u4e0b\u4f7f\u7528\u54ea\u79cd\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u6307\u51fa\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.29.1\u3001 BGP \u548c LDP<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u5e0c\u671b\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 FEC\uff0c\u53ef\u4ee5\u901a\u8fc7\u8def\u7531\u5230\u5730\u5740\u524d\u7f00\u6765\u8bc6\u522b\uff08\u53c2\u89c1\u7b2c 4.1 \u8282\uff09\u3002\u5982\u679c\u6709\u4e00\u79cd\u6807\u51c6\u7684\u3001\u5e7f\u6cdb\u90e8\u7f72\u7684\u8def\u7531\u7b97\u6cd5\u6765\u5206\u53d1\u8fd9\u4e9b\u8def\u7531\uff0c\u90a3\u4e48\u53ef\u4ee5\u8bf4\u6807\u7b7e\u5206\u53d1\u6700\u597d\u901a\u8fc7\u5c06\u6807\u7b7e\u5206\u53d1\u642d\u8f7d\u5728\u8def\u7531\u672c\u8eab\u7684\u5206\u53d1\u4e0a\u6765\u5b9e\u73b0\u3002<\/p>\n
    \u4f8b\u5982\uff0cBGP \u5206\u53d1\u6b64\u7c7b\u8def\u7531\uff0c\u5982\u679c BGP \u53d1\u8a00\u8005\u4e5f\u9700\u8981\u5411\u5176 BGP \u5bf9\u7b49\u65b9\u5206\u53d1\u6807\u7b7e\uff0c\u5219\u4f7f\u7528 BGP \u8fdb\u884c\u6807\u7b7e\u5206\u53d1\uff08\u53c2\u89c1 [MPLS-BGP]\uff09\u5177\u6709\u8bb8\u591a\u4f18\u70b9\u3002\u7279\u522b\u662f\uff0c\u5b83\u5141\u8bb8 BGP \u8def\u7531\u53cd\u5c04\u5668\u5206\u53d1\u6807\u7b7e\uff0c\u56e0\u6b64\u6bd4\u4f7f\u7528 LDP \u5728 BGP \u5bf9\u7b49\u4f53\u4e4b\u95f4\u5206\u53d1\u6807\u7b7e\u5177\u6709\u663e\u7740\u7684\u53ef\u6269\u5c55\u6027\u4f18\u52bf\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.29.2\u3001 RSVP \u6d41\u7a0b\u89c4\u8303\u7684\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53 RSVP \u7528\u4e8e\u4e3a\u7279\u5b9a\u6d41\u8bbe\u7f6e\u8d44\u6e90\u9884\u7559\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u6807\u8bb0\u8fd9\u4e9b\u6d41\u4e2d\u7684\u6570\u636e\u5305\uff0c\u4ee5\u4fbf\u4e0d\u9700\u8981\u5728\u6bcf\u4e00\u8df3\u5e94\u7528 RSVP \u8fc7\u6ee4\u5668\u89c4\u8303\u3002\u53ef\u4ee5\u8bf4\uff0c\u8ba9 RSVP \u5206\u53d1\u6807\u7b7e\u4f5c\u4e3a\u5176\u8def\u5f84\/\u4fdd\u7559\u8bbe\u7f6e\u8fc7\u7a0b\u7684\u4e00\u90e8\u5206\u662f\u4e3a\u6b64\u76ee\u7684\u5206\u53d1\u6807\u7b7e\u7684\u6700\u6709\u6548\u65b9\u6cd5\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.29.3\u3001 \u663e\u5f0f\u8def\u7531 LSP \u7684\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728 MPLS \u7684\u4e00\u4e9b\u5e94\u7528\u4e2d\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u4e0e\u6d41\u91cf\u5de5\u7a0b\u76f8\u5173\u7684\u5e94\u7528\u4e2d\uff0c\u9700\u8981\u5efa\u7acb\u4e00\u6761\u660e\u786e\u7684\u8def\u7531\u8def\u5f84\uff0c\u4ece\u5165\u53e3\u5230\u51fa\u53e3\u3002\u6cbf\u8be5\u8def\u5f84\u5e94\u7528\u8d44\u6e90\u9884\u7559\u4e5f\u662f\u53ef\u53d6\u7684\u3002<\/p>\n
    \u4eba\u4eec\u53ef\u4ee5\u60f3\u8c61\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n
    \n
    – \u4ece\u7528\u4e8e\u8bbe\u7f6e\u8d44\u6e90\u9884\u7559\u7684\u73b0\u6709\u534f\u8bae\u5f00\u59cb\uff0c\u5e76\u5c06\u5176\u6269\u5c55\u4e3a\u652f\u6301\u663e\u5f0f\u8def\u7531\u548c\u6807\u7b7e\u5206\u53d1\u3002<\/strong><\/p>\n
    – \u4ece\u7528\u4e8e\u6807\u7b7e\u5206\u53d1\u7684\u73b0\u6709\u534f\u8bae\u5f00\u59cb\uff0c\u5e76\u5c06\u5176\u6269\u5c55\u4e3a\u652f\u6301\u663e\u5f0f\u8def\u7531\u548c\u8d44\u6e90\u9884\u7559\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u7b2c\u4e00\u79cd\u65b9\u6cd5\u4ea7\u751f\u4e86[MPLS-RSVP-TUNNELS]\u4e2d\u89c4\u5b9a\u7684\u534f\u8bae\uff0c\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u4ea7\u751f\u4e86[MPLS-CR-LDP]\u4e2d\u89c4\u5b9a\u7684\u65b9\u6cd5\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    3.30\u3001 \u7ec4\u64ad<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u672c\u8282\u6709\u5f85\u8fdb\u4e00\u6b65\u7814\u7a76<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4\u3001 MPLS \u7684\u4e00\u4e9b\u5e94\u7528<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1\u3001 MPLS \u548c\u9010\u8df3\u8def\u7531\u6d41\u91cf<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    MPLS \u7684\u8bb8\u591a\u7528\u9014\u8981\u6c42\u5177\u6709\u7279\u5b9a\u6807\u7b7e\u7684\u6570\u636e\u5305\u6cbf\u7740\u76f8\u540c\u7684\u9010\u8df3\u8def\u7531\u8def\u5f84\u8f6c\u53d1\uff0c\u8be5\u8def\u5f84\u5c06\u7528\u4e8e\u8f6c\u53d1\u5728\u5176\u7f51\u7edc\u5c42\u76ee\u6807\u5730\u5740\u5b57\u6bb5\u4e2d\u5177\u6709\u6307\u5b9a\u5730\u5740\u7684\u6570\u636e\u5305\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.1\u3001 \u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u901a\u5e38\uff0c\u8def\u7531\u5668 R \u901a\u8fc7\u5728\u5176\u8def\u7531\u8868\u4e2d\u67e5\u627e\u4e0e P \u7684\u76ee\u6807\u5730\u5740\u6700\u957f\u5339\u914d\u7684\u5730\u5740\u524d\u7f00 X \u6765\u786e\u5b9a\u6570\u636e\u5305 P \u7684\u4e0b\u4e00\u8df3\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u7ed9\u5b9a FEC \u4e2d\u7684\u6570\u636e\u5305\u53ea\u662f\u90a3\u4e9b\u4e0e R \u8def\u7531\u8868\u4e2d\u7ed9\u5b9a\u5730\u5740\u524d\u7f00\u5339\u914d\u7684\u6570\u636e\u5305\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5730\u5740\u524d\u7f00\u6765\u6807\u8bc6 FEC\u3002<\/p>\n
    \u8bf7\u6ce8\u610f\uff0c\u6570\u636e\u5305 P \u53ef\u80fd\u4f1a\u5206\u914d\u7ed9 FEC F\uff0c\u5e76\u4e14 FEC F \u53ef\u80fd\u4f1a\u4f7f\u7528\u5730\u5740\u524d\u7f00 X \u6765\u6807\u8bc6\uff0c\u5373\u4f7f P \u7684\u76ee\u6807\u5730\u5740\u4e0e X \u4e0d\u5339\u914d\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.2\u3001 \u4e3a\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.2.1\u3001 \u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53\u4e14\u4ec5\u5f53\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\u4e4b\u4e00\u65f6\uff0cLSR R1 \u548c R2 \u88ab\u8ba4\u4e3a\u662f\u5730\u5740\u524d\u7f00 X \u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff1a<\/p>\n
    \n
    1. R1 \u5230 X \u7684\u8def\u7531\u662f\u5b83\u901a\u8fc7\u7279\u5b9a IGP \u7684\u7279\u5b9a\u5b9e\u4f8b\u83b7\u77e5\u7684\u8def\u7531\uff0c\u5e76\u4e14 R2 \u662f\u8be5 IGP \u5b9e\u4f8b\u4e2d R1 \u7684\u90bb\u5c45<\/strong><\/p>\n
    2. R1 \u5230 X \u7684\u8def\u7531\u662f\u5b83\u901a\u8fc7\u8def\u7531\u7b97\u6cd5 A1 \u7684\u67d0\u4e2a\u5b9e\u4f8b\u4e86\u89e3\u5230\u7684\u8def\u7531\uff0c\u5e76\u4e14\u8be5\u8def\u7531\u88ab\u91cd\u65b0\u5206\u914d\u5230\u8def\u7531\u7b97\u6cd5 A2 \u7684\u4e00\u4e2a\u5b9e\u4f8b\u4e2d\uff0c\u5e76\u4e14 R2 \u5728 A2 \u7684\u90a3\u4e2a\u5b9e\u4f8b\u4e2d\u662f R1 \u7684\u90bb\u5c45<\/strong><\/p>\n
    3. R1 \u662f\u53e6\u4e00\u4e2a LSP \u5185\u7684 LSP Tunnel \u7684\u63a5\u6536\u7aef\u70b9\uff0cR2 \u662f\u8be5\u96a7\u9053\u7684\u53d1\u9001\u7aef\u70b9\uff0cR1 \u548c R2 \u662f IGP \u516c\u5171\u5b9e\u4f8b\u7684\u53c2\u4e0e\u8005\uff0c\u5e76\u4e14\u5728\u540c\u4e00\u4e2a IGP \u533a\u57df\uff08\u5982\u679c\u6709\u95ee\u9898\u7684 IGP \u6709\u533a\u57df\uff09\uff0c\u5e76\u4e14 R1 \u5230 X \u7684\u8def\u7531\u662f\u901a\u8fc7\u8be5 IGP \u5b9e\u4f8b\u83b7\u77e5\u7684\uff0c\u6216\u8005\u7531 R1 \u91cd\u65b0\u5206\u914d\u5230\u8be5 IGP \u5b9e\u4f8b\u4e2d<\/strong><\/p>\n
    4. R1\u5230X\u7684\u8def\u7531\u662f\u5b83\u901a\u8fc7BGP\u83b7\u77e5\u7684\u8def\u7531\uff0cR2\u662fR1\u7684BGP peer<\/strong><\/p>\n<\/blockquote>\n
    \u901a\u5e38\uff0c\u8fd9\u4e9b\u89c4\u5219\u786e\u4fdd\u5982\u679c\u5230\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u8def\u7531\u662f\u901a\u8fc7 IGP \u5206\u53d1\u7684\uff0c\u5219\u8be5\u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u662f IGP \u90bb\u5c45\u3002\u5982\u679c\u901a\u8fc7 BGP \u5206\u53d1\u5230\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u8def\u7531\uff0c\u5219\u8be5\u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u662f BGP \u5bf9\u7b49\u4f53\u3002\u5728 LSP \u96a7\u9053\u7684\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u96a7\u9053\u7aef\u70b9\u662f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.2.2\u3001 \u5206\u53d1\u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e3a\u4e86\u4f7f\u7528 MPLS \u6839\u636e\u5bf9\u5e94\u4e8e\u4efb\u4f55\u5730\u5740\u524d\u7f00\u7684\u9010\u8df3\u8def\u7531\u8f6c\u53d1\u6570\u636e\u5305\uff0c\u6bcf\u4e2a LSR \u5fc5\u987b\uff1a<\/p>\n
    \n
    1. \u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230\u51fa\u73b0\u5728\u5176\u8def\u7531\u8868\u4e2d\u7684\u6bcf\u4e2a\u5730\u5740\u524d\u7f00\uff1b<\/strong><\/p>\n
    2. \u5bf9\u4e8e\u6bcf\u4e2a\u8fd9\u6837\u7684\u5730\u5740\u524d\u7f00 X\uff0c\u4f7f\u7528\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u5c06\u6807\u7b7e\u4e0e X \u7684\u7ed1\u5b9a\u5206\u53d1\u5230 X \u7684\u6bcf\u4e2a\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002<\/strong><\/p>\n
    \u8fd8\u6709\u4e00\u79cd\u60c5\u51b5\uff0cLSR \u5fc5\u987b\u4e3a\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\u7ed1\u5b9a\uff0c\u5373\u4f7f\u4e0d\u662f LSR \u5c06\u8be5\u6807\u7b7e\u7ed1\u5b9a\u5230\u8be5\u5730\u5740\u524d\u7f00\uff1a<\/strong><\/p>\n
    3. \u5982\u679c R1 \u4f7f\u7528 BGP \u5411 X \u5206\u53d1\u8def\u7531\uff0c\u5c06\u5176\u4ed6\u67d0\u4e2a LSR R2 \u547d\u540d\u4e3a\u5230 X \u7684 BGP Next Hop\uff0c\u5e76\u4e14\u5982\u679c R1 \u77e5\u9053 R2 \u5df2\u5c06\u6807\u7b7e L \u5206\u914d\u7ed9 X\uff0c\u5219 R1 \u5fc5\u987b\u5c06 L \u548c X \u4e4b\u95f4\u7684\u7ed1\u5b9a\u5206\u53d1\u5230\u5b83\u5206\u53d1\u8be5\u8def\u7531\u7684\u4efb\u4f55 BGP \u5bf9\u7b49\u4f53\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u8fd9\u4e9b\u89c4\u5219\u786e\u4fdd\u5f53\u4e14\u4ec5\u5f53 BGP \u8def\u7531\u5206\u914d\u5230 IGP \u65f6\uff0c\u5c06\u4e0e BGP \u8def\u7531\u5bf9\u5e94\u7684\u5730\u5740\u524d\u7f00\u5bf9\u5e94\u7684\u6807\u7b7e\u5206\u914d\u7ed9 IGP \u90bb\u5c45\u3002\u5426\u5219\uff0c\u7ed1\u5b9a\u5728 BGP \u8def\u7531\u4e0a\u7684\u6807\u7b7e\u53ea\u4f1a\u5206\u53d1\u7ed9\u5176\u4ed6 BGP \u53d1\u8a00\u8005\u3002<\/p>\n
    \u8fd9\u4e9b\u89c4\u5219\u4ec5\u7528\u4e8e\u6307\u793a\u7ed9\u5b9a LSR \u5fc5\u987b\u5411\u54ea\u4e9b\u5176\u4ed6 LSR \u5206\u53d1\u54ea\u4e9b\u6807\u7b7e\u7ed1\u5b9a\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.3\u3001 \u4f7f\u7528 Hop by Hop \u8def\u5f84\u4f5c\u4e3a LSP<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c\u6570\u636e\u5305P\u9700\u8981\u7ecf\u8fc7\u7684\u9010\u8df3\u8def\u5f84\u662f<R1, …, Rn>\uff0c\u90a3\u4e48<R1, …, Rn>\u53ef\u4ee5\u662f\u4e00\u6761LSP\uff0c\u53ea\u8981\uff1a<\/p>\n
    \n
    1. \u6709\u4e00\u4e2a\u5730\u5740\u524d\u7f00X\uff0c\u5bf9\u4e8e\u6240\u6709\u7684i\uff0c1<=i<n\uff0cX\u662fRi\u7684\u8def\u7531\u8868\u4e2dP\u7684\u76ee\u7684\u5730\u5740\u7684\u6700\u957f\u5339\u914d\uff1b<\/strong><\/p>\n
    2. \u5bf9\u4e8e\u6240\u6709\u7684 i\uff0c1<i<n\uff0cRi \u5df2\u7ecf\u4e3a X \u5206\u914d\u4e86\u4e00\u4e2a\u6807\u7b7e\uff0c\u5e76\u5c06\u8be5\u6807\u7b7e\u5206\u53d1\u7ed9\u4e86 R[i-1]\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u8bf7\u6ce8\u610f\uff0c\u6570\u636e\u5305\u7684 LSP \u53ea\u80fd\u6269\u5c55\u5230\u5b83\u9047\u5230\u4e00\u4e2a\u8def\u7531\u5668\uff0c\u8be5\u8def\u7531\u5668\u7684\u8f6c\u53d1\u8868\u5177\u6709\u66f4\u957f\u7684\u6570\u636e\u5305\u76ee\u6807\u5730\u5740\u7684\u6700\u4f73\u5339\u914d\u5730\u5740\u524d\u7f00\u3002\u6b64\u65f6\uff0cLSP \u5fc5\u987b\u7ed3\u675f\uff0c\u5fc5\u987b\u518d\u6b21\u6267\u884c\u6700\u4f73\u5339\u914d\u7b97\u6cd5\u3002<\/p>\n
    \u4f8b\u5982\uff0c\u5047\u8bbe\u76ee\u6807\u5730\u5740\u4e3a 10.2.153.178 \u7684\u6570\u636e\u5305 P \u9700\u8981\u4ece R1 \u5230 R2 \u518d\u5230 R3\u3002\u8fd8\u5047\u8bbe R2 \u5411 R1 \u901a\u544a\u5730\u5740\u524d\u7f00 10.2\/16\uff0c\u4f46 R3 \u5411 R2 \u901a\u544a 10.2.153\/23\u300110.2.154\/23 \u548c 10.2\/16\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cR2 \u6b63\u5728\u5411 R1 \u901a\u544a\u201c\u805a\u5408\u8def\u7531\u201d\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u5305P\u53ef\u4ee5\u5728\u5230\u8fbeR2\u4e4b\u524d\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\uff0c\u4f46\u662f\u7531\u4e8eR2\u5df2\u7ecf\u8fdb\u884c\u4e86\u8def\u7531\u805a\u5408\uff0c\u6240\u4ee5\u5b83\u5fc5\u987b\u6267\u884c\u6700\u4f73\u5339\u914d\u7b97\u6cd5\u624d\u80fd\u627e\u5230P\u7684FEC\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.4\u3001 LSP \u51fa\u53e3\u548c LSP \u4ee3\u7406\u51fa\u53e3<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53\u4e14\u4ec5\u5f53\u4ee5\u4e0b\u6761\u4ef6\u4e4b\u4e00\u6210\u7acb\u65f6\uff0cLSR R \u88ab\u8ba4\u4e3a\u662f\u5730\u5740\u524d\u7f00 X \u7684\u201cLSP \u51fa\u53e3\u201dLSR\uff1a<\/p>\n
    \n
    1. R \u6709\u4e00\u4e2a\u5730\u5740 Y\uff0c\u6240\u4ee5 X \u662f R \u7684\u8def\u7531\u8868\u4e2d\u4e0e Y \u6700\u957f\u5339\u914d\u7684\u5730\u5740\u524d\u7f00\uff0c\u6216<\/strong><\/p>\n
    2. R \u5728\u5176\u8def\u7531\u8868\u4e2d\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u5730\u5740\u524d\u7f00 Y\uff0c\u4f7f\u5f97 X \u662f Y \u7684\u9002\u5f53\u521d\u59cb\u5b50\u4e32\uff0c\u4f46 R \u7684 X \u7684\u201cLSP \u524d\u4e00\u8df3\u201d\u4e0d\u5305\u542b\u4efb\u4f55\u6b64\u7c7b\u5730\u5740\u524d\u7f00 Y\uff1b\u4e5f\u5c31\u662f\u8bf4\uff0cR \u662f\u5730\u5740\u524d\u7f00 X \u7684\u201c\u89e3\u805a\u70b9\u201d\u3002<\/strong><\/p>\n<\/blockquote>\n
    LSR R1 \u88ab\u8ba4\u4e3a\u662f\u5730\u5740\u524d\u7f00 X \u7684\u201cLSP \u4ee3\u7406\u51fa\u53e3\u201dLSR\uff0c\u5f53\u4e14\u4ec5\u5f53\uff1a<\/p>\n
    \n
    1. R1 \u5bf9 X \u7684\u4e0b\u4e00\u8df3\u662f R2\uff0c\u5e76\u4e14 R1 \u548c R2 \u4e0d\u662f X \u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff08\u53ef\u80fd\u662f\u56e0\u4e3a R2 \u4e0d\u652f\u6301 MPLS\uff09\uff0c\u6216<\/strong><\/p>\n
    2. R1 \u5df2\u914d\u7f6e\u4e3a X \u7684 LSP \u4ee3\u7406\u51fa\u53e3<\/strong><\/p>\n<\/blockquote>\n
    LSP \u7684\u5b9a\u4e49\u5141\u8bb8 LSP Egress \u662f\u4e00\u4e2a\u4e0d\u652f\u6301 MPLS \u7684\u8282\u70b9\uff1b\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cLSP \u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a\u8282\u70b9\u662f\u4ee3\u7406\u51fa\u53e3\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.5\u3001 \u9690\u5f0f NULL \u6807\u7b7e<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u9690\u5f0f NULL \u6807\u7b7e\u662f\u4e00\u4e2a\u5177\u6709\u7279\u6b8a\u8bed\u4e49\u7684\u6807\u7b7e\uff0cLSR \u53ef\u4ee5\u5c06\u5176\u7ed1\u5b9a\u5230\u5730\u5740\u524d\u7f00\u3002\u5982\u679c LSR Ru \u901a\u8fc7\u54a8\u8be2\u5176 ILM\uff0c\u770b\u5230\u6807\u8bb0\u7684\u6570\u636e\u5305 P \u5fc5\u987b\u5728 Rd \u65c1\u8fb9\u8f6c\u53d1\uff0c\u4f46\u8be5 Rd \u5df2\u5c06\u9690\u5f0f NULL \u7684\u7ed1\u5b9a\u5206\u53d1\u5230\u76f8\u5e94\u7684\u5730\u5740\u524d\u7f00\uff0c\u5219\u4ee3\u66ff\u66ff\u6362\u9876\u90e8\u7684\u6807\u7b7e\u503c\u6807\u7b7e\u6808\uff0cRu\u5f39\u51fa\u6807\u7b7e\u6808\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u5305\u8f6c\u53d1\u7ed9Rd\u3002<\/p>\n
    LSR Rd \u5c06\u9690\u5f0f NULL \u548c\u5730\u5740\u524d\u7f00 X \u4e4b\u95f4\u7684\u7ed1\u5b9a\u5206\u914d\u7ed9 LSR Ru \u5f53\u4e14\u4ec5\u5f53\uff1a<\/p>\n
    \n
    1. \u7b2c 4.1.2 \u8282\u7684\u89c4\u5219\u8868\u660e Rd \u5206\u53d1\u7ed9 Ru \u4e00\u4e2a\u7ed1\u5b9a X \u7684\u6807\u7b7e\uff0c\u5e76\u4e14<\/strong><\/p>\n
    2. Rd \u77e5\u9053 Ru \u53ef\u4ee5\u652f\u6301\u9690\u5f0f NULL \u6807\u7b7e\uff08\u5373\u5b83\u53ef\u4ee5\u5f39\u51fa\u6807\u7b7e\u5806\u6808\uff09\uff0c\u5e76\u4e14<\/strong><\/p>\n
    3. Rd \u662f X \u7684 LSP \u51fa\u53e3\uff08\u4e0d\u662f\u4ee3\u7406\u51fa\u53e3\uff09\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u8fd9\u4f1a\u5bfc\u81f4 LSP \u4e0a\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u5f39\u51fa\u6807\u7b7e\u5806\u6808\u3002\u8fd9\u662f\u975e\u5e38\u5408\u9002\u7684\uff1b\u5982\u679c LSP Egress \u662f X \u7684 MPLS Egress\uff0c\u90a3\u4e48\u5982\u679c\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u6ca1\u6709\u5f39\u51fa\u6807\u7b7e\u6808\uff0cLSP Egress \u5c06\u9700\u8981\u67e5\u627e\u6807\u7b7e\uff0c\u5f39\u51fa\u6807\u7b7e\u6808\uff0c\u7136\u540e\u67e5\u627e\u4e0b\u4e00\u4e2a\u6807\u7b7e\uff08\u6216\u67e5\u627eL3 \u5730\u5740\uff08\u5982\u679c\u4e0d\u5b58\u5728\u66f4\u591a\u6807\u7b7e\uff09\u3002\u901a\u8fc7\u8ba9\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u5f39\u51fa\u6807\u7b7e\u5806\u6808\uff0cLSP \u51fa\u53e3\u7701\u53bb\u4e86\u5fc5\u987b\u67e5\u627e\u4e24\u4e2a\u6807\u7b7e\u624d\u80fd\u505a\u51fa\u8f6c\u53d1\u51b3\u5b9a\u7684\u5de5\u4f5c\u3002<\/p>\n
    \u4f46\u662f\uff0c\u5982\u679c\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u662f ATM \u4ea4\u6362\u673a\uff0c\u5219\u5b83\u53ef\u80fd\u65e0\u6cd5\u5f39\u51fa\u6807\u7b7e\u5806\u6808\u3002\u56e0\u6b64\uff0c\u9690\u5f0f NULL \u7684\u7ed1\u5b9a\u53ef\u80fd\u53ea\u5206\u53d1\u7ed9\u652f\u6301\u8be5\u529f\u80fd\u7684 LSR\u3002<\/p>\n
    \u5982\u679c\u5730\u5740\u524d\u7f00 X \u7684 LSP \u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a LSR \u662f LSP \u4ee3\u7406\u51fa\u53e3\uff0c\u5b83\u7684\u884c\u4e3a\u5c31\u50cf LSP \u51fa\u53e3\u4e3a X \u5206\u53d1\u4e86\u4e00\u4e2a\u9690\u5f0f NULL \u7684\u7ed1\u5b9a\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.1.6\u3001 \u9009\u9879\uff1a\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cLSP \u5165\u53e3 Ri \u77e5\u9053\u51e0\u4e2a\u4e0d\u540c FEC \u7684\u6570\u636e\u5305\u90fd\u5fc5\u987b\u9075\u5faa\u76f8\u540c\u7684 LSP\uff0c\u4f8b\u5982\u5728 LSP \u51fa\u53e3 Re \u5904\u7ec8\u6b62\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u5bf9\u6240\u6709\u6b64\u7c7b FEC \u4f7f\u7528\u5355\u4e2a\u6807\u7b7e\u6765\u5b9e\u73b0\u6b63\u786e\u7684\u8def\u7531\uff1b\u6ca1\u6709\u5fc5\u8981\u4e3a\u6bcf\u4e2a FEC \u6709\u4e00\u4e2a\u4e0d\u540c\u7684\u6807\u7b7e\u3002\u5982\u679c\uff08\u4e14\u4ec5\u5f53\uff09\u4ee5\u4e0b\u6761\u4ef6\u6210\u7acb\uff1a<\/p>\n
    \n
    1. LSR Re \u7684\u5730\u5740\u672c\u8eab\u5728\u8def\u7531\u8868\u4e2d\u4f5c\u4e3a\u201c\u4e3b\u673a\u8def\u7531\u201d\uff0c\u5e76\u4e14<\/strong><\/p>\n
    2. \u6709\u4e00\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u8ba9 Ri \u786e\u5b9a Re \u662f\u7279\u5b9a FEC \u96c6\u4e2d\u6240\u6709\u6570\u636e\u5305\u7684 LSP \u51fa\u53e3<\/strong><\/p>\n<\/blockquote>\n
    \u7136\u540e Ri \u53ef\u4ee5\u5c06\u5355\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230\u96c6\u5408\u4e2d\u7684\u6240\u6709 FECS\u3002\u8fd9\u79f0\u4e3a\u201c\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d\u201d\u3002<\/p>\n
    LSR Ri \u5982\u4f55\u786e\u5b9a\u67d0\u4e2a LSR Re \u662f\u7279\u5b9a FEC \u4e2d\u6240\u6709\u6570\u636e\u5305\u7684 LSP \u51fa\u53e3\uff1f\u6709\u591a\u79cd\u53ef\u80fd\u7684\u65b9\u5f0f\uff1a<\/p>\n
    \n
    – \u5982\u679c\u7f51\u7edc\u6b63\u5728\u8fd0\u884c\u94fe\u8def\u72b6\u6001\u8def\u7531\u7b97\u6cd5\uff0c\u5e76\u4e14\u8be5\u533a\u57df\u4e2d\u7684\u6240\u6709\u8282\u70b9\u90fd\u652f\u6301 MPLS\uff0c\u90a3\u4e48\u8def\u7531\u7b97\u6cd5\u4f1a\u4e3a Ri \u63d0\u4f9b\u8db3\u591f\u7684\u4fe1\u606f\u6765\u786e\u5b9a\u8be5 FEC \u4e2d\u7684\u6570\u636e\u5305\u5fc5\u987b\u901a\u8fc7\u54ea\u4e9b\u8def\u7531\u5668\u79bb\u5f00\u8def\u7531\u57df\u6216\u533a\u57df\u3002<\/strong><\/p>\n
    – \u5982\u679c\u7f51\u7edc\u6b63\u5728\u8fd0\u884c BGP\uff0cRi \u53ef\u80fd\u80fd\u591f\u786e\u5b9a\u7279\u5b9a FEC \u4e2d\u7684\u6570\u636e\u5305\u5fc5\u987b\u901a\u8fc7\u67d0\u4e2a\u7279\u5b9a\u8def\u7531\u5668\u79bb\u5f00\u7f51\u7edc\uff0c\u8be5\u8def\u7531\u5668\u662f\u8be5 FEC \u7684\u201cBGP \u4e0b\u4e00\u8df3\u201d\u3002<\/strong><\/p>\n
    – \u53ef\u4ee5\u4f7f\u7528\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u6765\u4f20\u9012\u6709\u5173\u54ea\u4e9b\u5730\u5740\u524d\u7f00\u201c\u9644\u52a0\u201d\u5230\u54ea\u4e9b\u51fa\u53e3 LSR \u7684\u4fe1\u606f\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u4e0d\u4f9d\u8d56\u4e8e\u94fe\u8def\u72b6\u6001\u8def\u7531\u7684\u5b58\u5728\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u5982\u679c\u4f7f\u7528\u51fa\u53e3\u5b9a\u5411\u6807\u7b7e\u5206\u914d\uff0c\u6574\u4e2a\u7f51\u7edc\u9700\u8981\u652f\u6301\u7684\u6807\u7b7e\u6570\u91cf\u53ef\u80fd\u4f1a\u5927\u5927\u51cf\u5c11\u3002\u5982\u679c\u4f7f\u7528\u4f20\u7edf\u4ea4\u6362\u786c\u4ef6\u6765\u6267\u884c MPLS\uff0c\u5e76\u4e14\u4ea4\u6362\u786c\u4ef6\u53ea\u80fd\u652f\u6301\u6709\u9650\u6570\u91cf\u7684\u6807\u7b7e\uff0c\u90a3\u4e48\u8fd9\u53ef\u80fd\u5f88\u91cd\u8981\u3002<\/p>\n
    \u4e00\u79cd\u53ef\u80fd\u7684\u65b9\u6cd5\u662f\u5c06\u7f51\u7edc\u914d\u7f6e\u4e3a\u9ed8\u8ba4\u4f7f\u7528\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d\uff0c\u4f46\u5c06\u7279\u5b9a LSR \u914d\u7f6e\u4e3a\u4e0d\u4e3a\u4e00\u4e2a\u6216\u591a\u4e2a\u5730\u5740\u524d\u7f00\u4f7f\u7528\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d\uff0c\u8be5\u5730\u5740\u524d\u7f00\u662f LSP \u51fa\u53e3\u3002\u6211\u4eec\u5f3a\u52a0\u4ee5\u4e0b\u89c4\u5219\uff1a<\/p>\n
    \n
    – \u5982\u679c\u4e00\u4e2a\u7279\u5b9a\u7684 LSR \u4e0d\u662f\u67d0\u7ec4\u5730\u5740\u524d\u7f00\u7684 LSP \u51fa\u53e3\uff0c\u90a3\u4e48\u5b83\u5e94\u8be5\u4ee5\u4e0e\u5b83\u7684 LSP \u4e0b\u4e00\u8df3\u4e3a\u8fd9\u4e9b\u5730\u5740\u524d\u7f00\u6240\u505a\u7684\u76f8\u540c\u7684\u65b9\u5f0f\u4e3a\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5047\u8bbe Rd \u662f Ru \u7684 LSP \u4e0b\u4e00\u8df3\u5730\u5740\u524d\u7f00 X1 \u548c X2\u3002\u5982\u679c Rd \u4e3a X1 \u548c X2 \u5206\u914d\u76f8\u540c\u7684\u6807\u7b7e\uff0cRu \u4e5f\u5e94\u8be5\u5982\u6b64\u3002\u5982\u679c Rd \u4e3a X1 \u548c X2 \u5206\u914d\u4e0d\u540c\u7684\u6807\u7b7e\uff0c\u90a3\u4e48 Ru \u4e5f\u5e94\u8be5\u5982\u6b64\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u4f8b\u5982\uff0c\u5047\u8bbe\u5e0c\u671b\u5c06\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d\u8bbe\u4e3a\u9ed8\u8ba4\u503c\uff0c\u4f46\u8981\u5c06\u4e0d\u540c\u7684\u6807\u7b7e\u5206\u914d\u7ed9\u90a3\u4e9b\u6709\u591a\u4e2a\u53ef\u80fd\u7684 LSP \u51fa\u53e3\u7684\u5730\u5740\u524d\u7f00\uff08\u5373\uff0c\u5bf9\u4e8e\u90a3\u4e9b\u591a\u5bbf\u4e3b\u5730\u5740\u524d\u7f00\uff09\u3002\u53ef\u4ee5\u914d\u7f6e\u6240\u6709 LSR \u4f7f\u7528\u51fa\u53e3\u76ee\u6807\u6807\u7b7e\u5206\u914d\uff0c\u7136\u540e\u914d\u7f6e\u5c11\u6570 LSR \u4e3a\u90a3\u4e9b\u591a\u5bbf\u4e3b\u5730\u5740\u524d\u7f00\u5206\u914d\u4e0d\u540c\u7684\u6807\u7b7e\u3002\u5bf9\u4e8e\u7279\u5b9a\u7684\u591a\u5bbf\u4e3b\u5730\u5740\u524d\u7f00 X\uff0c\u53ea\u9700\u8981\u5728 LSP \u51fa\u53e3\u6216 LSP \u4ee3\u7406\u51fa\u53e3\u7684 LSR \u4e2d\u914d\u7f6e X\u3002<\/p>\n
    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c Ru \u548c Rd \u662f X1 \u548c X2 \u7684 LSP \u4e2d\u76f8\u90bb\u7684 LSR\uff0c\u5982\u679c Ru \u4e3a X1 \u548c X2 \u5206\u914d\u4e0d\u540c\u7684\u6807\u7b7e\u800c Rd \u53ea\u4e3a\u5b83\u4eec\u5206\u914d\u4e00\u4e2a\u6807\u7b7e\uff0c\u5219\u8f6c\u53d1\u4ecd\u5c06\u6b63\u786e\u5b8c\u6210\u3002\u8fd9\u53ea\u662f\u610f\u5473\u7740 R1 \u4f1a\u5c06\u4e0d\u540c\u7684\u4f20\u5165\u6807\u7b7e\u6620\u5c04\u5230\u76f8\u540c\u7684\u4f20\u51fa\u6807\u7b7e\uff0c\u8fd9\u662f\u4e00\u4e2a\u666e\u901a\u7684\u4e8b\u4ef6\u3002<\/p>\n
    \u7c7b\u4f3c\u5730\uff0c\u5982\u679c Rd \u4e3a X1 \u548c X2 \u5206\u914d\u4e86\u4e0d\u540c\u7684\u6807\u7b7e\uff0c\u4f46 Ru \u4e3a\u5b83\u4eec\u5206\u914d\u4e86\u4e0e\u5176 LSP \u51fa\u53e3\u6216\u4ee3\u7406\u51fa\u53e3\u5730\u5740\u5bf9\u5e94\u7684\u6807\u7b7e\uff0c\u8f6c\u53d1\u4ecd\u5c06\u6b63\u786e\u5b8c\u6210\u3002 Ru \u53ea\u4f1a\u5c06\u4f20\u5165\u6807\u7b7e\u6620\u5c04\u5230 Rd \u5206\u914d\u7ed9\u8be5 LSP \u51fa\u53e3\u5730\u5740\u7684\u6807\u7b7e\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.2\u3001 MPLS \u548c\u663e\u5f0f\u8def\u7531 LSP<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u53ef\u80fd\u9700\u8981\u4f7f\u7528\u663e\u5f0f\u8def\u7531\u800c\u4e0d\u662f\u9010\u8df3\u8def\u7531\u7684\u539f\u56e0\u6709\u5f88\u591a\u3002\u4f8b\u5982\uff0c\u8fd9\u5141\u8bb8\u8def\u7531\u57fa\u4e8e\u7ba1\u7406\u7b56\u7565\uff0c\u5e76\u5141\u8bb8\u4ed4\u7ec6\u8bbe\u8ba1 LSP \u6240\u91c7\u7528\u7684\u8def\u7531\u4ee5\u5141\u8bb8\u6d41\u91cf\u5de5\u7a0b [MPLS-TRFENG]\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.2.1\u3001 \u663e\u5f0f\u8def\u7531 LSP \u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u7f51\u7edc\u7ba1\u7406\u5458\u53ef\u80fd\u5e0c\u671b\u6cbf\u7740\u67d0\u4e9b\u9884\u5148\u6307\u5b9a\u7684\u8def\u5f84\u8f6c\u53d1\u67d0\u4e9b\u7c7b\u522b\u7684\u6d41\u91cf\uff0c\u5176\u4e2d\u8fd9\u4e9b\u8def\u5f84\u4e0e\u6d41\u91cf\u901a\u5e38\u9075\u5faa\u7684\u9010\u8df3\u8def\u5f84\u4e0d\u540c\u3002\u8fd9\u53ef\u4ee5\u7528\u4e8e\u652f\u6301\u7b56\u7565\u8def\u7531\u6216\u6d41\u91cf\u5de5\u7a0b\u3002\u663e\u5f0f\u8def\u7531\u53ef\u4ee5\u662f\u914d\u7f6e\u7684\u8def\u7531\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u67d0\u79cd\u65b9\u5f0f\u52a8\u6001\u786e\u5b9a\uff0c\u4f8b\u5982\u901a\u8fc7\u57fa\u4e8e\u7ea6\u675f\u7684\u8def\u7531\u3002<\/p>\n
    MPLS \u5141\u8bb8\u901a\u8fc7\u663e\u5f0f\u8def\u7531 LSP \u96a7\u9053\u8f7b\u677e\u5b8c\u6210\u6b64\u64cd\u4f5c\u3002\u6240\u9700\u8981\u7684\u53ea\u662f\uff1a<\/p>\n
    \n
    1. \u9009\u62e9\u8981\u53d1\u9001\u5230Explicitly Routed LSP Tunnel\u7684\u6570\u636e\u5305\u7684\u65b9\u6cd5\uff1b<\/strong><\/p>\n
    2. \u5efa\u7acbExplicitly Routed LSP\u96a7\u9053\u7684\u65b9\u6cd5\uff1b<\/strong><\/p>\n
    3. \u4e00\u79cd\u786e\u4fdd\u53d1\u9001\u5230\u96a7\u9053\u7684\u6570\u636e\u5305\u4e0d\u4f1a\u4ece\u63a5\u6536\u7aef\u70b9\u73af\u8def\u56de\u5230\u53d1\u9001\u7aef\u70b9\u7684\u65b9\u6cd5\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u5982\u679c\u96a7\u9053\u7684\u53d1\u9001\u7aef\u70b9\u5e0c\u671b\u5c06\u6807\u8bb0\u7684\u6570\u636e\u5305\u653e\u5165\u96a7\u9053\uff0c\u5b83\u5fc5\u987b\u9996\u5148\u7528\u96a7\u9053\u63a5\u6536\u7aef\u70b9\u5206\u914d\u7ed9\u5b83\u7684\u6807\u7b7e\u503c\u66ff\u6362\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u503c\u3002\u7136\u540e\u5b83\u5fc5\u987b\u538b\u5165\u4e0e\u96a7\u9053\u672c\u8eab\u76f8\u5bf9\u5e94\u7684\u6807\u7b7e\uff0c\u8be5\u6807\u7b7e\u7531\u6cbf\u96a7\u9053\u7684\u4e0b\u4e00\u8df3\u5206\u914d\u7ed9\u5b83\u3002\u4e3a\u6b64\uff0c\u96a7\u9053\u7aef\u70b9\u5e94\u8be5\u662f\u663e\u5f0f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002\u4ed6\u4eec\u9700\u8981\u4ea4\u6362\u7684\u6807\u7b7e\u7ed1\u5b9a\u5bf9\u96a7\u9053\u6cbf\u7ebf\u7684 LSR \u4e0d\u611f\u5174\u8da3\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.3\u3001 \u6807\u7b7e\u5806\u6808\u548c\u9690\u5f0f\u5bf9\u7b49\u4e92\u8fde<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe\u7279\u5b9a\u7684 LSR Re \u662f 10 \u4e2a\u5730\u5740\u524d\u7f00\u7684 LSP \u4ee3\u7406\u51fa\u53e3\uff0c\u5e76\u4e14\u5b83\u901a\u8fc7\u4e0d\u540c\u7684\u63a5\u53e3\u5230\u8fbe\u6bcf\u4e2a\u5730\u5740\u524d\u7f00\u3002<\/p>\n
    \u53ef\u4ee5\u4e3a\u6240\u6709 10 \u4e2a\u5730\u5740\u524d\u7f00\u5206\u914d\u4e00\u4e2a\u6807\u7b7e\u3002\u7136\u540e Re \u662f\u6240\u6709 10 \u4e2a\u5730\u5740\u524d\u7f00\u7684 LSP \u51fa\u53e3\u3002\u8fd9\u786e\u4fdd\u6240\u6709 10 \u4e2a\u5730\u5740\u524d\u7f00\u7684\u6570\u636e\u5305\u90fd\u88ab\u4f20\u9001\u5230 Re\u3002\u4f46\u662f\uff0cRe \u5fc5\u987b\u67e5\u627e\u6bcf\u4e2a\u6b64\u7c7b\u6570\u636e\u5305\u7684\u7f51\u7edc\u5c42\u5730\u5740\uff0c\u4ee5\u4fbf\u9009\u62e9\u5408\u9002\u7684\u63a5\u53e3\u6765\u53d1\u9001\u6570\u636e\u5305\u3002<\/p>\n
    \u6216\u8005\uff0c\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u63a5\u53e3\u5206\u914d\u4e00\u4e2a\u4e0d\u540c\u7684\u6807\u7b7e\u3002\u7136\u540e Re \u662f 10 \u4e2a\u5730\u5740\u524d\u7f00\u7684 LSP \u4ee3\u7406\u51fa\u53e3\u3002\u8fd9\u6d88\u9664\u4e86 Re \u67e5\u627e\u7f51\u7edc\u5c42\u5730\u5740\u4ee5\u8f6c\u53d1\u6570\u636e\u5305\u7684\u9700\u8981\u3002\u4f46\u662f\uff0c\u5b83\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4f7f\u7528\u5927\u91cf\u6807\u7b7e\u3002<\/p>\n
    \u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u5c06\u6240\u6709 10 \u4e2a\u5730\u5740\u524d\u7f00\u7ed1\u5b9a\u5230\u76f8\u540c\u7684 1 \u7ea7\u6807\u7b7e\uff08\u4e5f\u7ed1\u5b9a\u5230 LSR \u672c\u8eab\u7684\u5730\u5740\uff09\uff0c\u7136\u540e\u5c06\u6bcf\u4e2a\u5730\u5740\u524d\u7f00\u7ed1\u5b9a\u5230\u4e0d\u540c\u7684 2 \u7ea7\u6807\u7b7e\u3002 2 \u7ea7\u6807\u7b7e\u5c06\u88ab\u89c6\u4e3a 1 \u7ea7\u6807\u7b7e\u7ed1\u5b9a\u7684\u4e00\u4e2a\u5c5e\u6027\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u201c\u5806\u6808\u5c5e\u6027\u201d\u3002\u6211\u4eec\u5f3a\u52a0\u4ee5\u4e0b\u89c4\u5219\uff1a<\/p>\n
    – \u5f53 LSR Ru \u6700\u521d\u6807\u8bb0\u4e00\u4e2a\u8fc4\u4eca\u4e3a\u6b62\u672a\u6807\u8bb0\u7684\u6570\u636e\u5305\u65f6\uff0c\u5982\u679c\u8be5\u6570\u636e\u5305\u7684\u76ee\u7684\u5730\u5740\u7684\u6700\u957f\u5339\u914d\u662f X\uff0c\u5e76\u4e14 Ru \u7684 X \u7684 LSP \u4e0b\u4e00\u8df3\u662f Rd\uff0c\u5e76\u4e14 Rd \u5df2\u5411 Ru \u5206\u53d1\u4e86\u6807\u7b7e L1 \u5230 X \u7684\u7ed1\u5b9a\uff0c\u4ee5\u53caL2 \u7684\u5806\u6808\u5c5e\u6027\uff0c\u5219<\/strong><\/p>\n
    \n
    1. Ru\u5fc5\u987b\u5148\u5c06L2\u518dL1\u538b\u5165\u6570\u636e\u5305\u7684\u6807\u7b7e\u6808\uff0c\u7136\u540e\u518d\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u7ed9Rd\uff1b<\/strong><\/p>\n
    2. \u5f53 Ru \u5c06 X \u7684\u6807\u7b7e\u7ed1\u5b9a\u5206\u53d1\u7ed9\u5b83\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u65f6\uff0c\u5b83\u5fc5\u987b\u5305\u62ec L2 \u4f5c\u4e3a\u5806\u6808\u5c5e\u6027\u3002<\/strong><\/p>\n
    3. \u6bcf\u5f53\u5806\u6808\u5c5e\u6027\u53d1\u751f\u53d8\u5316\u65f6\uff08\u53ef\u80fd\u662f\u56e0\u4e3a Ru \u7684 LSP \u4e0b\u4e00\u8df3 X \u7684\u53d8\u5316\uff09\uff0cRu \u5fc5\u987b\u5206\u53d1\u65b0\u7684\u5806\u6808\u5c5e\u6027\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u6ce8\u610f\uff0c\u867d\u7136\u6cbf LSP \u7684\u6bcf\u4e00\u8df3\u7ed1\u5b9a\u5230 X \u7684\u6807\u7b7e\u503c\u53ef\u80fd\u4e0d\u540c\uff0c\u4f46\u5806\u6808\u5c5e\u6027\u503c\u4e0d\u53d8\u5730\u4f20\u9012\uff0c\u5e76\u7531 LSP \u4ee3\u7406\u51fa\u53e3\u8bbe\u7f6e\u3002<\/p>\n
    \u56e0\u6b64\uff0cX \u7684 LSP \u4ee3\u7406\u51fa\u53e3\u4e0e\u8def\u7531\u533a\u57df\u6216\u57df\u4e2d\u7684\u5176\u4ed6 LSR \u6210\u4e3a\u201c\u9690\u5f0f\u5bf9\u7b49\u4f53\u201d\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u663e\u5f0f\u5bf9\u7b49\u8fde\u63a5\u5c06\u8fc7\u4e8e\u7b28\u62d9\uff0c\u56e0\u4e3a\u5bf9\u7b49\u70b9\u7684\u6570\u91cf\u4f1a\u53d8\u5f97\u592a\u5927\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.4\u3001 MPLS \u548c\u591a\u8def\u5f84\u8def\u7531<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679c LSR \u652f\u6301\u7279\u5b9a\u6d41\u7684\u591a\u4e2a\u8def\u7531\uff0c\u5219\u5b83\u53ef\u4ee5\u4e3a\u6d41\u5206\u914d\u591a\u4e2a\u6807\u7b7e\uff0c\u6bcf\u4e2a\u8def\u7531\u4e00\u4e2a\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u7279\u5b9a\u90bb\u5c45\u7684\u7b2c\u4e8c\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u7684\u63a5\u6536\u5e94\u88ab\u89c6\u4e3a\u610f\u5473\u7740\u4efb\u4e00\u6807\u7b7e\u90fd\u53ef\u7528\u4e8e\u8868\u793a\u8be5\u5730\u5740\u524d\u7f00\u3002<\/p>\n
    \u5982\u679c\u4e3a\u7279\u5b9a\u5730\u5740\u524d\u7f00\u6307\u5b9a\u4e86\u591a\u4e2a\u6807\u7b7e\u7ed1\u5b9a\uff0c\u5219\u5b83\u4eec\u53ef\u80fd\u5177\u6709\u4e0d\u540c\u7684\u5c5e\u6027\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.5\u3001 \u4f5c\u4e3a\u591a\u70b9\u5bf9\u70b9\u5b9e\u4f53\u7684 LSP \u6811<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8003\u8651\u6570\u636e\u5305 P1 \u548c P2 \u7684\u60c5\u51b5\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u90fd\u6709\u4e00\u4e2a\u76ee\u7684\u5730\u5730\u5740\uff0c\u5176\u5728\u6574\u4e2a\u7279\u5b9a\u8def\u7531\u57df\u4e2d\u7684\u6700\u957f\u5339\u914d\u662f\u5730\u5740\u524d\u7f00 X\u3002\u5047\u8bbe P1 \u7684\u9010\u8df3\u8def\u5f84\u662f <R1, R2, R3> , \u5e76\u4e14 P2 \u7684\u9010\u8df3\u8def\u5f84\u662f <R4, R2, R3>\u3002\u5047\u8bbe R3 \u5c06\u6807\u7b7e L3 \u7ed1\u5b9a\u5230 X\uff0c\u5e76\u5c06\u6b64\u7ed1\u5b9a\u5206\u53d1\u7ed9 R2\u3002 R2 \u5c06\u6807\u7b7e L2 \u7ed1\u5b9a\u5230 X\uff0c\u5e76\u5c06\u6b64\u7ed1\u5b9a\u5206\u53d1\u7ed9 R1 \u548c R4\u3002\u5f53 R2 \u6536\u5230\u6570\u636e\u5305 P1 \u65f6\uff0c\u5b83\u7684\u4f20\u5165\u6807\u7b7e\u5c06\u662f L2\u3002 R2 \u5c06\u7528 L3 \u8986\u76d6 L2\uff0c\u5e76\u5c06 P1 \u53d1\u9001\u5230 R3\u3002\u5f53 R2 \u6536\u5230\u6570\u636e\u5305 P2 \u65f6\uff0c\u5b83\u7684\u4f20\u5165\u6807\u7b7e\u4e5f\u5c06\u662f L2\u3002 R2 \u518d\u6b21\u7528 L3 \u8986\u76d6 L2\uff0c\u5e76\u5c06 P2 \u53d1\u9001\u5230 R3\u3002<\/p>\n
    \u7136\u540e\u6ce8\u610f\uff0c\u5f53P1\u548cP2\u4eceR2\u5230R3\u65f6\uff0c\u5b83\u4eec\u643a\u5e26\u76f8\u540c\u7684\u6807\u7b7e\uff0c\u5c31MPLS\u800c\u8a00\uff0c\u5b83\u4eec\u662f\u65e0\u6cd5\u533a\u5206\u7684\u3002\u56e0\u6b64\uff0c\u4e0e\u5176\u8ba8\u8bba\u4e24\u4e2a\u4e0d\u540c\u7684 LSP\uff0c<R1, R2, R3> \u548c <R4, R2, R3>\uff0c\u4e0d\u5982\u8ba8\u8bba\u5355\u4e2a\u201c\u591a\u70b9\u5bf9\u70b9 LSP \u6811\u201d\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u8868\u793a\u4e3a <{R1, R4}\u3001R2\u3001R3>\u3002<\/p>\n
    \u5f53\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u4f20\u7edf\u7684 ATM \u4ea4\u6362\u673a\u4f5c\u4e3a LSR \u65f6\uff0c\u8fd9\u4f1a\u4ea7\u751f\u4e00\u4e2a\u56f0\u96be\u3002\u7531\u4e8e\u4f20\u7edf\u7684 ATM \u4ea4\u6362\u673a\u4e0d\u652f\u6301\u591a\u70b9\u5bf9\u70b9\u8fde\u63a5\uff0c\u56e0\u6b64\u5fc5\u987b\u6709\u7a0b\u5e8f\u6765\u786e\u4fdd\u6bcf\u4e2a LSP \u5b9e\u73b0\u4e3a\u4e00\u4e2a\u70b9\u5bf9\u70b9 VC\u3002\u7136\u800c\uff0c\u5982\u679c\u4f7f\u7528\u652f\u6301\u591a\u70b9\u5bf9\u70b9 VC \u7684 ATM \u4ea4\u6362\u673a\uff0c\u90a3\u4e48 LSP \u53ef\u4ee5\u6700\u6709\u6548\u5730\u5b9e\u73b0\u4e3a\u591a\u70b9\u5bf9\u70b9 VC\u3002\u6216\u8005\uff0c\u5982\u679c\u53ef\u4ee5\u4f7f\u7528 SVP \u591a\u70b9\u7f16\u7801\uff08\u7b2c 3.25.2 \u8282\uff09\uff0c\u5219 LSP \u53ef\u4ee5\u5b9e\u73b0\u4e3a\u591a\u70b9\u5bf9\u70b9 SVP\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.6\u3001 BGP \u8fb9\u754c\u8def\u7531\u5668\u4e4b\u95f4\u7684 LSP \u96a7\u9053<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8003\u8651\u4e00\u4e2a\u81ea\u6cbb\u7cfb\u7edf A \u7684\u60c5\u51b5\uff0c\u5b83\u627f\u8f7d\u5176\u4ed6\u81ea\u6cbb\u7cfb\u7edf\u4e4b\u95f4\u7684\u4f20\u8f93\u6d41\u91cf\u3002\u81ea\u6cbb\u7cfb\u7edf A \u5c06\u6709\u591a\u4e2a BGP \u8fb9\u754c\u8def\u7531\u5668\uff0c\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684 BGP \u8fde\u63a5\u7f51\uff0cBGP \u8def\u7531\u5728\u5176\u4e0a\u5206\u5e03\u3002\u5728\u8bb8\u591a\u6b64\u7c7b\u60c5\u51b5\u4e0b\uff0c\u5e0c\u671b\u907f\u514d\u5c06 BGP \u8def\u7531\u5206\u53d1\u5230\u4e0d\u662f BGP \u8fb9\u754c\u8def\u7531\u5668\u7684\u8def\u7531\u5668\u3002\u5982\u679c\u53ef\u4ee5\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u8fd9\u4e9b\u8def\u7531\u5668\u4e0a\u7684\u201c\u8def\u7531\u5206\u53d1\u8d1f\u8f7d\u201d\u5c06\u663e\u7740\u964d\u4f4e\u3002\u4f46\u662f\uff0c\u5fc5\u987b\u6709\u4e00\u4e9b\u65b9\u6cd5\u6765\u786e\u4fdd\u5185\u90e8\u8def\u7531\u5668\u5c06\u4f20\u8f93\u6d41\u91cf\u4ece\u8fb9\u754c\u8def\u7531\u5668\u4f20\u9001\u5230\u8fb9\u754c\u8def\u7531\u5668\u3002<\/p>\n
    \u8fd9\u53ef\u4ee5\u901a\u8fc7 LSP \u96a7\u9053\u8f7b\u677e\u5b8c\u6210\u3002\u5047\u8bbe BGP \u8def\u7531\u4ec5\u5206\u53d1\u5230 BGP \u8fb9\u754c\u8def\u7531\u5668\uff0c\u800c\u4e0d\u5206\u53d1\u5230\u4ece\u8fb9\u754c\u8def\u7531\u5668\u5230\u8fb9\u754c\u8def\u7531\u5668\u7684\u9010\u8df3\u8def\u5f84\u4e0a\u7684\u5185\u90e8\u8def\u7531\u5668\u3002\u7136\u540e\u53ef\u4ee5\u6309\u5982\u4e0b\u65b9\u5f0f\u4f7f\u7528 LSP \u96a7\u9053\uff1a<\/p>\n
    1. \u6bcf\u4e2a BGP \u8fb9\u754c\u8def\u7531\u5668\u5411\u540c\u4e00\u81ea\u6cbb\u7cfb\u7edf\u4e2d\u7684\u6bcf\u4e2a\u5176\u4ed6 BGP \u8fb9\u754c\u8def\u7531\u5668\u5206\u53d1\u5b83\u901a\u8fc7 BGP \u5206\u53d1\u7ed9\u8be5\u8def\u7531\u5668\u7684\u6bcf\u4e2a\u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u3002<\/strong><\/p>\n
    2. \u81ea\u6cbb\u7cfb\u7edf\u7684IGP \u4e3a\u6bcf\u4e2aBGP \u8fb9\u754c\u8def\u7531\u5668\u7ef4\u62a4\u4e00\u4e2a\u4e3b\u673a\u8def\u7531\u3002\u6bcf\u4e2a\u5185\u90e8\u8def\u7531\u5668\u5c06\u8fd9\u4e9b\u4e3b\u673a\u8def\u7531\u7684\u6807\u7b7e\u5206\u53d1\u7ed9\u5b83\u7684\u6bcf\u4e2a IGP \u90bb\u5c45\u3002<\/strong><\/p>\n
    3. \u5047\u8bbe\uff1a<\/strong><\/p>\n
    \n
    a) BGP \u8fb9\u754c\u8def\u7531\u5668 B1 \u6536\u5230\u4e00\u4e2a\u672a\u6807\u8bb0\u7684\u6570\u636e\u5305 P\uff0c<\/strong><\/p>\n
    b) B1 \u7684\u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00 X \u662f P \u7684\u76ee\u7684\u5730\u5740\u7684\u6700\u957f\u5339\u914d\uff0c<\/strong><\/p>\n
    c) \u5230 X \u7684\u8def\u7531\u662f BGP \u8def\u7531\uff0c<\/strong><\/p>\n
    d) X \u7684 BGP \u4e0b\u4e00\u8df3\u662f B2\uff0c<\/strong><\/p>\n
    e) B2 \u5df2\u5c06\u6807\u7b7e L1 \u7ed1\u5b9a\u5230 X\uff0c\u5e76\u5c06\u6b64\u7ed1\u5b9a\u5206\u53d1\u7ed9 B1\uff0c<\/strong><\/p>\n
    f) B2\u5730\u5740\u7684IGP\u4e0b\u4e00\u8df3\u662fI1\uff0c<\/strong><\/p>\n
    g) B2 \u7684\u5730\u5740\u4f5c\u4e3a\u4e3b\u673a\u8def\u7531\u5728 B1 \u548c I1 \u7684 IGP \u8def\u7531\u8868\u4e2d\uff0c\u5e76\u4e14<\/strong><\/p>\n
    h) I1 \u5df2\u5c06\u6807\u7b7e L2 \u7ed1\u5b9a\u5230 B2 \u7684\u5730\u5740\uff0c\u5e76\u5c06\u6b64\u7ed1\u5b9a\u5206\u53d1\u7ed9 B1\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u90a3\u4e48\u5728\u5411I1\u53d1\u9001\u6570\u636e\u5305P\u4e4b\u524d\uff0cB1\u5fc5\u987b\u4e3aP\u521b\u5efa\u4e00\u4e2a\u6807\u7b7e\u6808\uff0c\u7136\u540e\u538b\u5165\u6807\u7b7eL1\uff0c\u518d\u538b\u5165\u6807\u7b7eL2\u3002<\/p>\n
    4. \u5047\u8bbe BGP \u8fb9\u754c\u8def\u7531\u5668 B1 \u6536\u5230\u4e00\u4e2a\u5e26\u6807\u7b7e\u7684 Packet P\uff0c\u5176\u4e2d\u6807\u7b7e\u6808\u9876\u90e8\u7684\u6807\u7b7e\u5bf9\u5e94\u5730\u5740\u524d\u7f00 X\uff0c\u8be5\u8def\u7531\u662f BGP \u8def\u7531\uff0c\u6761\u4ef6 3b, 3c, 3d,\u548c 3e \u90fd\u6301\u6709\u3002\u90a3\u4e48\u5728\u5411I1\u53d1\u9001\u6570\u636e\u5305P\u4e4b\u524d\uff0cB1\u5fc5\u987b\u7528L1\u66ff\u6362\u6807\u7b7e\u6808\u9876\u90e8\u7684\u6807\u7b7e\uff0c\u7136\u540e\u538b\u5165\u6807\u7b7eL2\u3002<\/strong><\/p>\n
    \u901a\u8fc7\u8fd9\u4e9b\u8fc7\u7a0b\uff0c\u7ed9\u5b9a\u7684\u6570\u636e\u5305 P \u9075\u5faa\u6240\u6709\u6210\u5458\u90fd\u662f BGP \u8fb9\u754c\u8def\u7531\u5668\u7684\u7b2c 1 \u7ea7 LSP\uff0c\u5e76\u4e14\u5728\u7b2c 1 \u7ea7 LSP \u4e2d\u7684\u6bcf\u5bf9 BGP \u8fb9\u754c\u8def\u7531\u5668\u4e4b\u95f4\uff0c\u5b83\u9075\u5faa\u7b2c 2 \u7ea7 LSP\u3002<\/p>\n
    \u8fd9\u4e9b\u8fc7\u7a0b\u6709\u6548\u5730\u5728 BGP \u8fb9\u754c\u8def\u7531\u5668\u4e4b\u95f4\u521b\u5efa\u4e86\u4e00\u4e2a\u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\u3002<\/p>\n
    \u7531\u4e8e BGP \u8fb9\u754c\u8def\u7531\u5668\u6b63\u5728\u4e3a IGP \u8def\u7531\u751a\u81f3\u4e0d\u77e5\u9053\u7684\u5730\u5740\u524d\u7f00\u4ea4\u6362\u6807\u7b7e\u7ed1\u5b9a\uff0c\u56e0\u6b64 BGP \u8def\u7531\u5668\u5e94\u8be5\u6210\u4e3a\u5f7c\u6b64\u4e4b\u95f4\u7684\u663e\u5f0f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002<\/p>\n
    \u6709\u65f6\u53ef\u4ee5\u5728\u4e24\u4e2a BGP \u8fb9\u754c\u8def\u7531\u5668\u4e4b\u95f4\u521b\u5efa\u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\uff0c\u5373\u4f7f\u5b83\u4eec\u4e0d\u5728\u540c\u4e00\u4e2a\u81ea\u6cbb\u7cfb\u7edf\u4e2d\u3002\u4f8b\u5982\uff0c\u5047\u8bbeB1\u548cB2\u5728AS 1\u4e2d\u3002\u5047\u8bbeB3\u662fB2\u7684EBGP\u90bb\u5c45\uff0c\u5e76\u4e14\u5728AS2\u4e2d\u3002\u6700\u540e\uff0c\u5047\u8bbe B2 \u548c B3 \u4f4d\u4e8e\u4e24\u4e2a\u81ea\u6cbb\u7cfb\u7edf\uff08\u201c\u975e\u519b\u4e8b\u533a\u201d\uff09\u5171\u6709\u7684\u67d0\u4e2a\u7f51\u7edc\u4e0a\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u5728B1\u548cB3\u4e4b\u95f4\u76f4\u63a5\u5efa\u7acb\u4e00\u6761LSP\u96a7\u9053\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
    \n
    – B3 \u5411 B2 \u5206\u53d1\u8def\u7531\uff08\u4f7f\u7528 EBGP\uff09\uff0c\u53ef\u9009\u62e9\u4e3a\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\uff1b<\/strong><\/p>\n
    – B2 \u5c06\u8fd9\u4e9b\u8def\u7531\u91cd\u65b0\u5206\u914d\u5230 B1\uff08\u4f7f\u7528 IBGP\uff09\uff0c\u8868\u660e\u6bcf\u4e2a\u6b64\u7c7b\u8def\u7531\u7684 BGP \u4e0b\u4e00\u8df3\u662f B3\u3002\u5982\u679c B3 \u4e3a\u5730\u5740\u524d\u7f00\u5206\u914d\u4e86\u6807\u7b7e\uff0cB2 \u5c06\u8fd9\u4e9b\u6807\u7b7e\u539f\u5c01\u4e0d\u52a8\u5730\u4f20\u9012\u7ed9 B1\u3002<\/strong><\/p>\n
    – AS1 \u7684 IGP \u6709\u4e00\u6761\u901a\u5f80 B3 \u7684\u4e3b\u673a\u8def\u7531\u3002<\/strong><\/p>\n<\/blockquote>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.7\u3001 \u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\u7684\u5176\u4ed6\u7528\u9014<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\u7684\u4f7f\u7528\u4e0d\u9650\u4e8e BGP \u4e0b\u4e00\u8df3\u4e4b\u95f4\u7684\u96a7\u9053\u3002\u4efb\u4f55\u53ef\u80fd\u4f7f\u7528\u5c01\u88c5\u96a7\u9053\u7684\u60c5\u51b5\u90fd\u662f\u9002\u5408\u4f7f\u7528\u9010\u8df3\u8def\u7531 LSP \u96a7\u9053\u7684\u60c5\u51b5\u3002\u4e0d\u662f\u4f7f\u7528\u76ee\u7684\u5730\u5730\u5740\u662f\u96a7\u9053\u63a5\u6536\u7aef\u70b9\u5730\u5740\u7684\u65b0\u6807\u5934\u5c01\u88c5\u6570\u636e\u5305\uff0c\u800c\u662f\u5c06\u4e0e\u96a7\u9053\u63a5\u6536\u7aef\u70b9\u5730\u5740\u6700\u957f\u5339\u914d\u7684\u5730\u5740\u524d\u7f00\u5bf9\u5e94\u7684\u6807\u7b7e\u538b\u5165\u5230\u6570\u636e\u5305\u7684\u6807\u7b7e\u5806\u6808\u4e0a\u3002\u53d1\u9001\u5230\u96a7\u9053\u4e2d\u7684\u6570\u636e\u5305\u53ef\u80fd\u5df2\u7ecf\u6216\u53ef\u80fd\u6ca1\u6709\u88ab\u6807\u8bb0\u3002<\/p>\n
    \u5982\u679c\u96a7\u9053\u7684\u53d1\u9001\u7aef\u70b9\u5e0c\u671b\u5c06\u6807\u8bb0\u7684\u6570\u636e\u5305\u653e\u5165\u96a7\u9053\uff0c\u5b83\u5fc5\u987b\u9996\u5148\u7528\u96a7\u9053\u63a5\u6536\u7aef\u70b9\u5206\u914d\u7ed9\u5b83\u7684\u6807\u7b7e\u503c\u66ff\u6362\u5806\u6808\u9876\u90e8\u7684\u6807\u7b7e\u503c\u3002\u7136\u540e\u5b83\u5fc5\u987b\u538b\u5165\u4e0e\u96a7\u9053\u672c\u8eab\u76f8\u5bf9\u5e94\u7684\u6807\u7b7e\uff0c\u8be5\u6807\u7b7e\u7531\u6cbf\u96a7\u9053\u7684\u4e0b\u4e00\u8df3\u5206\u914d\u7ed9\u5b83\u3002\u4e3a\u6b64\uff0c\u96a7\u9053\u7aef\u70b9\u5e94\u8be5\u662f\u663e\u5f0f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u3002\u4ed6\u4eec\u9700\u8981\u4ea4\u6362\u7684\u6807\u7b7e\u7ed1\u5b9a\u5bf9\u96a7\u9053\u6cbf\u7ebf\u7684 LSR \u4e0d\u611f\u5174\u8da3\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    4.8\u3001 MPLS \u548c\u7ec4\u64ad<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7ec4\u64ad\u8def\u7531\u901a\u8fc7\u6784\u5efa\u7ec4\u64ad\u6811\u6765\u8fdb\u884c\u3002\u7279\u5b9a\u7ec4\u64ad\u6570\u636e\u5305\u5fc5\u987b\u6cbf\u5176\u8f6c\u53d1\u7684\u6811\u901a\u5e38\u53d6\u51b3\u4e8e\u6570\u636e\u5305\u7684\u6e90\u5730\u5740\u548c\u76ee\u6807\u5730\u5740\u3002\u6bcf\u5f53\u7279\u5b9a LSR \u662f\u7279\u5b9a\u7ec4\u64ad\u6811\u4e2d\u7684\u8282\u70b9\u65f6\uff0c\u5b83\u5c31\u4f1a\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u8be5\u6811\u3002\u7136\u540e\u5b83\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230\u7ec4\u64ad\u6811\u4e0a\u7684\u7236\u8282\u70b9\u3002 \uff08\u5982\u679c\u6709\u95ee\u9898\u7684\u8282\u70b9\u5728 LAN \u4e0a\uff0c\u5e76\u4e14\u5728\u8be5 LAN \u4e0a\u6709\u5144\u5f1f\u59d0\u59b9\uff0c\u5219\u5b83\u8fd8\u5fc5\u987b\u5c06\u7ed1\u5b9a\u5206\u53d1\u7ed9\u5176\u5144\u5f1f\u59d0\u59b9\u3002\u8fd9\u5141\u8bb8\u7236\u8282\u70b9\u5728\u5411 LAN \u4e0a\u7684\u6240\u6709\u5b50\u8282\u70b9\u7ec4\u64ad\u65f6\u4f7f\u7528\u5355\u4e2a\u6807\u7b7e\u503c\u3002\uff09<\/p>\n
    \u5f53\u4e00\u4e2a\u7ec4\u64ad\u6807\u8bb0\u6570\u636e\u5305\u5230\u8fbe\u65f6\uff0c\u4e0e\u8be5\u6807\u7b7e\u5bf9\u5e94\u7684 NHLFE \u6307\u793a\u8be5\u6570\u636e\u5305\u7684\u8f93\u51fa\u63a5\u53e3\u96c6\uff0c\u4ee5\u53ca\u4f20\u51fa\u6807\u7b7e\u3002\u5982\u679c\u5728\u6240\u6709\u4f20\u51fa\u63a5\u53e3\u4e0a\u4f7f\u7528\u76f8\u540c\u7684\u6807\u7b7e\u7f16\u7801\u6280\u672f\uff0c\u5219\u53ef\u4ee5\u5c06\u5b8c\u5168\u76f8\u540c\u7684\u6570\u636e\u5305\u53d1\u9001\u5230\u6240\u6709\u5b50\u63a5\u53e3\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5\u3001 \u6807\u7b7e\u5206\u53d1\u7a0b\u5e8f\uff08Hop-by-Hop\uff09<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u672c\u8282\u4e2d\uff0c\u6211\u4eec\u53ea\u8003\u8651\u7528\u4e8e\u6d41\u91cf\u6cbf\u5176\u9010\u8df3\u8def\u7531\u8def\u5f84\u8fdb\u884c\u6807\u7b7e\u4ea4\u6362\u7684\u6807\u7b7e\u7ed1\u5b9a\u3002\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6709\u95ee\u9898\u7684\u6807\u7b7e\u5c06\u5bf9\u5e94\u4e8e\u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1\u3001 \u901a\u544a\u548c\u4f7f\u7528\u6807\u7b7e\u7684\u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6709\u8bb8\u591a\u4e0d\u540c\u7684\u8fc7\u7a0b\u53ef\u7528\u4e8e\u5206\u53d1\u6807\u7b7e\u7ed1\u5b9a\u3002\u6709\u4e9b\u7531\u4e0b\u6e38 LSR \u6267\u884c\uff0c\u6709\u4e9b\u7531\u4e0a\u6e38 LSR \u6267\u884c\u3002<\/p>\n
    \u4e0b\u6e38 LSR \u5fc5\u987b\u6267\u884c\uff1a<\/p>\n
    – \u5206\u53d1\u7a0b\u5e8f\uff0c\u4ee5\u53ca<\/strong><\/p>\n
    – \u9000\u51fa\u7a0b\u5e8f\u3002<\/strong><\/p>\n
    \u4e0a\u6e38 LSR \u5fc5\u987b\u6267\u884c\uff1a<\/p>\n
    – \u8bf7\u6c42\u7a0b\u5e8f\uff0c\u4ee5\u53ca<\/strong><\/p>\n
    – NotAvailable \u7a0b\u5e8f\uff0c\u4ee5\u53ca<\/strong><\/p>\n
    – \u91ca\u653e\u7a0b\u5e8f\uff0c\u4ee5\u53ca<\/strong><\/p>\n
    – \u6807\u7b7e\u4f7f\u7528\u7a0b\u5e8f\u3002<\/strong><\/p>\n
    MPLS \u4f53\u7cfb\u7ed3\u6784\u652f\u6301\u6bcf\u4e2a\u8fc7\u7a0b\u7684\u591a\u4e2a\u53d8\u4f53\u3002<\/p>\n
    \u7136\u800c\uff0cMPLS \u67b6\u6784\u5e76\u4e0d\u652f\u6301\u6240\u6709\u53ef\u80fd\u53d8\u4f53\u7684\u6240\u6709\u53ef\u80fd\u7ec4\u5408\u3002\u652f\u6301\u7684\u7ec4\u5408\u96c6\u5c06\u5728\u7b2c 5.2 \u8282\u4e2d\u63cf\u8ff0\uff0c\u5176\u4e2d\u8fd8\u5c06\u8ba8\u8bba\u4e0d\u540c\u7ec4\u5408\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.1\u3001 \u4e0b\u6e38 LSR\uff1a\u5206\u914d\u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e0b\u6e38 LSR \u4f7f\u7528\u5206\u53d1\u7a0b\u5e8f\u6765\u786e\u5b9a\u4f55\u65f6\u5e94\u5c06\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u7ed1\u5b9a\u5206\u53d1\u7ed9\u5176\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u3002\u8be5\u67b6\u6784\u652f\u6301\u56db\u79cd\u4e0d\u540c\u7684\u5206\u53d1\u7a0b\u5e8f\u3002<\/p>\n
    \u4e0d\u8003\u8651\u4f7f\u7528\u7684\u7279\u5b9a\u8fc7\u7a0b\uff0c\u5982\u679c\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u6807\u7b7e\u7ed1\u5b9a\u5df2\u7531\u4e0b\u6e38 LSR Rd \u5206\u53d1\u5230\u4e0a\u6e38 LSR Ru\uff0c\u5e76\u4e14\u5982\u679c\u8be5\u7ed1\u5b9a\u7684\u5c5e\u6027\uff08\u5982\u4e0a\u5b9a\u4e49\uff09\u5728\u4efb\u4f55\u65f6\u5019\u53d1\u751f\u53d8\u5316\uff0c\u5219Rd \u5fc5\u987b\u5c06\u65b0\u5c5e\u6027\u901a\u77e5 Ru\u3002<\/p>\n
    \u5982\u679c\u4e00\u4e2a LSR \u7ef4\u62a4\u5230\u4e00\u4e2a\u7279\u5b9a\u5730\u5740\u524d\u7f00\u7684\u591a\u6761\u8def\u7531\uff0c\u5219\u8be5 LSR \u662f\u5426\u5c06\u591a\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u5230\u5730\u5740\u524d\u7f00\uff08\u6bcf\u4e2a\u8def\u7531\u4e00\u4e2a\uff09\uff0c\u4ece\u800c\u5206\u53d1\u591a\u4e2a\u7ed1\u5b9a\uff0c\u8fd9\u662f\u4e00\u4e2a\u672c\u5730\u95ee\u9898\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.1.1\u3001 PushUnconditional<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8ba9 Rd \u662f\u4e00\u4e2a LSR\u3002\u5047\u8bbe\uff1a<\/p>\n
    \n
    1. X \u662f Rd \u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00<\/strong><\/p>\n
    2. Ru \u662f Rd \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u8282\u70b9<\/strong><\/p>\n<\/blockquote>\n
    \u6bcf\u5f53\u8fd9\u4e9b\u6761\u4ef6\u6210\u7acb\u65f6\uff0cRd \u5fc5\u987b\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\u3002 Rd \u8d1f\u8d23\u8ddf\u8e2a\u5b83\u5206\u53d1\u7ed9 Ru \u7684\u7ed1\u5b9a\uff0c\u5e76\u786e\u4fdd Ru \u59cb\u7ec8\u62e5\u6709\u8fd9\u4e9b\u7ed1\u5b9a\u3002<\/p>\n
    \u5728\u72ec\u7acb LSP \u63a7\u5236\u6a21\u5f0f\u4e0b\u6267\u884c\u4e3b\u52a8\u4e0b\u6e38\u6807\u7b7e\u5206\u914d\u7684 LSR \u5c06\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.1.2\u3001 PushConditional<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8ba9 Rd \u662f\u4e00\u4e2a LSR\u3002\u5047\u8bbe\uff1a<\/p>\n
    \n
    1. X \u662f Rd \u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00<\/strong><\/p>\n
    2. Ru \u662f Rd \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u8282\u70b9<\/strong><\/p>\n
    3. Rd \u662f X \u7684 LSP \u51fa\u53e3\u6216 LSP \u4ee3\u7406\u51fa\u53e3\uff0c\u6216\u8005 Rd \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\u662f Rn\uff0c\u5176\u4e2d Rn \u4e0e Ru \u4e0d\u540c\uff0c\u5e76\u4e14 Rn \u5df2\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230 Rd\u3002<\/strong><\/p>\n<\/blockquote>\n
    \u7136\u540e\uff0c\u4e00\u65e6\u8fd9\u4e9b\u6761\u4ef6\u90fd\u6210\u7acb\uff0cRd \u5e94\u8be5\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\u3002<\/p>\n
    PushUnconditional \u4f1a\u4e3a\u8def\u7531\u8868\u4e2d\u7684\u6240\u6709\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\u7ed1\u5b9a\uff0c\u800c PushConditional \u53ea\u4f1a\u4e3a\u90a3\u4e9b\u5df2\u7ecf\u4ece\u81ea\u5df1\u7684 LSP \u4e0b\u4e00\u8df3\u63a5\u6536\u5230\u6807\u7b7e\u7ed1\u5b9a\u7684\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\u7ed1\u5b9a\uff0c\u6216\u8005\u4e3a\u90a3\u4e9b\u5730\u5740\u524d\u7f00\u5206\u914d\u6807\u7b7e\u7ed1\u5b9a\u3002\u652f\u6301 MPLS \u7684 L3 \u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u8be5\u8fc7\u7a0b\u5c06\u7531\u5728\u6709\u5e8f LSP \u63a7\u5236\u6a21\u5f0f\u4e0b\u6267\u884c\u4e3b\u52a8\u4e0b\u6e38\u6807\u7b7e\u5206\u914d\u7684 LSR \u4f7f\u7528\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.1.3\u3001 PulledUnconditional<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8ba9 Rd \u662f\u4e00\u4e2a LSR\u3002\u5047\u8bbe\uff1a<\/p>\n
    \n
    1. X \u662f Rd \u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00<\/strong><\/p>\n
    2. Ru \u662f Rd \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u8282\u70b9<\/strong><\/p>\n
    3. Ru \u660e\u786e\u8981\u6c42 Rd \u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru<\/strong><\/p>\n<\/blockquote>\n
    \u7136\u540e Rd \u5e94\u8be5\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\u3002\u8bf7\u6ce8\u610f\uff0c\u5982\u679c X \u4e0d\u5728 Rd \u7684\u8def\u7531\u8868\u4e2d\uff0c\u6216\u8005\u5982\u679c Rd \u4e0d\u662f Ru \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u5219 Rd \u5fc5\u987b\u901a\u77e5 Ru \u5b83\u6b64\u65f6\u65e0\u6cd5\u63d0\u4f9b\u7ed1\u5b9a\u3002<\/p>\n
    \u5982\u679c Rd \u5df2\u7ecf\u5411 Ru \u5206\u53d1\u4e86\u5730\u5740\u524d\u7f00 X \u7684\u7ed1\u5b9a\uff0c\u5e76\u4e14\u5b83\u6536\u5230\u6765\u81ea Ru \u7684\u65b0\u7684\u5730\u5740\u524d\u7f00 X \u7ed1\u5b9a\u8bf7\u6c42\uff0c\u5b83\u5c06\u7ed1\u5b9a\u7b2c\u4e8c\u4e2a\u6807\u7b7e\uff0c\u5e76\u5c06\u65b0\u7684\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\u3002\u7b2c\u4e00\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u4ecd\u7136\u6709\u6548\u3002<\/p>\n
    \u8be5\u8fc7\u7a0b\u5c06\u7531\u4f7f\u7528\u72ec\u7acb LSP \u63a7\u5236\u6a21\u5f0f\u6267\u884c\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\u7684 LSR \u4f7f\u7528\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.1.4\u3001 PulledConditional<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8ba9 Rd \u662f\u4e00\u4e2a LSR\u3002\u5047\u8bbe\uff1a<\/p>\n
    \n
    1. X \u662f Rd \u8def\u7531\u8868\u4e2d\u7684\u5730\u5740\u524d\u7f00<\/strong><\/p>\n
    2. Ru \u662f Rd \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u8282\u70b9<\/strong><\/p>\n
    3. Ru \u660e\u786e\u8981\u6c42 Rd \u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru<\/strong><\/p>\n
    4. Rd \u662f X \u7684 LSP \u51fa\u53e3\u6216 LSP \u4ee3\u7406\u51fa\u53e3\uff0c\u6216\u8005 Rd \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\u662f Rn\uff0c\u5176\u4e2d Rn \u4e0e Ru \u4e0d\u540c\uff0c\u5e76\u4e14 Rn \u5df2\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u5230 Rd<\/strong><\/p>\n<\/blockquote>\n
    \u7136\u540e\uff0c\u4e00\u65e6\u8fd9\u4e9b\u6761\u4ef6\u90fd\u6210\u7acb\uff0cRd \u5e94\u8be5\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230 X \u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\u3002\u8bf7\u6ce8\u610f\uff0c\u5982\u679c X \u4e0d\u5728 Rd \u7684\u8def\u7531\u8868\u4e2d\uff0c\u5e76\u4e14\u65e0\u6cd5\u901a\u8fc7 Rd \u7684 X \u4e0b\u4e00\u8df3\u83b7\u5f97 X \u7684\u7ed1\u5b9a\uff0c\u6216\u8005\u5982\u679c Rd \u4e0d\u662f Ru \u76f8\u5bf9\u4e8e X \u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u5219 Rd \u5fc5\u987b\u901a\u77e5 Ru \u5b83\u4e0d\u80fd\u63d0\u4f9b\u6b64\u65f6\u7684\u7ed1\u5b9a\u3002<\/p>\n
    \u4f46\u662f\uff0c\u5982\u679c\u552f\u4e00\u4e0d\u6210\u7acb\u7684\u6761\u4ef6\u662f Rn \u5c1a\u672a\u5411 Rd \u63d0\u4f9b\u6807\u7b7e\uff0c\u5219 Rd \u5fc5\u987b\u63a8\u8fdf\u5bf9 Ru \u7684\u4efb\u4f55\u54cd\u5e94\uff0c\u76f4\u5230\u5b83\u6536\u5230\u6765\u81ea Rn \u7684\u7ed1\u5b9a\u3002<\/p>\n
    \u5982\u679c Rd \u5df2\u5c06\u5730\u5740\u524d\u7f00 X \u7684\u6807\u7b7e\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru\uff0c\u5e76\u4e14\u5728\u7a0d\u540e\u67d0\u4e2a\u65f6\u95f4\uff0c\u6807\u7b7e\u7ed1\u5b9a\u7684\u4efb\u4f55\u5c5e\u6027\u53d1\u751f\u66f4\u6539\uff0c\u5219 Rd \u5fc5\u987b\u4f7f\u7528\u65b0\u5c5e\u6027\u5c06\u6807\u7b7e\u7ed1\u5b9a\u91cd\u65b0\u5206\u53d1\u7ed9 Ru\u3002\u5373\u4f7f Ru \u6ca1\u6709\u53d1\u51fa\u65b0\u7684\u8bf7\u6c42\uff0c\u5b83\u4e5f\u5fc5\u987b\u8fd9\u6837\u505a\u3002<\/p>\n
    \u5728\u6709\u5e8f LSP \u63a7\u5236\u6a21\u5f0f\u4e0b\u6267\u884c\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u914d\u7684 LSR \u5c06\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \u5728 5.2 \u8282\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u5982\u4f55\u9009\u62e9\u5728\u4efb\u4f55\u7ed9\u5b9a\u65f6\u95f4\u4f7f\u7528\u7684\u7279\u5b9a\u7a0b\u5e8f\uff0c\u4ee5\u53ca\u5982\u4f55\u786e\u4fdd\u9009\u62e9\u4e0d\u540c\u7a0b\u5e8f\u7684 LSR \u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.2\u3001 \u4e0a\u6e38 LSR\uff1a\u8bf7\u6c42\u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8bf7\u6c42\u8fc7\u7a0b\u7531\u4e0a\u6e38 LSR \u7528\u4e8e\u5730\u5740\u524d\u7f00\uff0c\u4ee5\u786e\u5b9a\u4f55\u65f6\u660e\u786e\u8bf7\u6c42\u4e0b\u6e38 LSR \u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u8be5\u524d\u7f00\u5e76\u5206\u53d1\u7ed1\u5b9a\u3002\u53ef\u4ee5\u4f7f\u7528\u4e09\u79cd\u53ef\u80fd\u7684\u7a0b\u5e8f\u3002<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.2.1\u3001 RequestNever<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6c38\u8fdc\u4e0d\u8981\u63d0\u51fa\u8981\u6c42\u3002\u5982\u679c\u4e0b\u6e38 LSR \u4f7f\u7528 PushConditional \u8fc7\u7a0b\u6216 PushUnconditional \u8fc7\u7a0b\uff0c\u8fd9\u5f88\u6709\u7528\uff0c\u4f46\u5982\u679c\u4e0b\u6e38 LSR \u4f7f\u7528 PulledUnconditional \u8fc7\u7a0b\u6216 PulledConditional \u8fc7\u7a0b\uff0c\u5219\u8fd9\u5f88\u6709\u7528\u3002<\/p>\n
    \u5f53\u4f7f\u7528\u672a\u7ecf\u8bf7\u6c42\u7684\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\u548c\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u65f6\uff0cLSR \u5c06\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.2.2\u3001 RequestWhenNeeded<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6bcf\u5f53 L3 \u4e0b\u4e00\u8df3\u5230\u5730\u5740\u524d\u7f00\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6216\u8005\u5728\u83b7\u77e5\u65b0\u7684\u5730\u5740\u524d\u7f00\u65f6\u53d1\u51fa\u8bf7\u6c42\uff0c\u5e76\u4e14\u5bf9\u4e8e\u7ed9\u5b9a\u7684\u5730\u5740\u524d\u7f00\u8fd8\u6ca1\u6709\u6765\u81ea\u8be5\u4e0b\u4e00\u8df3\u7684\u6807\u7b7e\u7ed1\u5b9a\u3002<\/p>\n
    \u6bcf\u5f53\u4f7f\u7528\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u65f6\uff0cLSR \u90fd\u4f1a\u4f7f\u7528\u6b64\u7a0b\u5e8f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.2.3\u3001 RequestOnRequest<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u9664\u4e86\u5728\u9700\u8981\u65f6\u53d1\u51fa\u8bf7\u6c42\uff08\u5982\u7b2c 5.1.2.2 \u8282\u6240\u8ff0\uff09\u4e4b\u5916\uff0c\u6bcf\u5f53\u6536\u5230\u8bf7\u6c42\u65f6\u53d1\u51fa\u8bf7\u6c42\u3002\u5982\u679c Ru \u4e0d\u80fd\u4f5c\u4e3a LSP \u5165\u53e3\uff0c\u5b83\u53ef\u80fd\u53ea\u6709\u5728\u6536\u5230\u6765\u81ea\u4e0a\u6e38\u7684\u8bf7\u6c42\u65f6\u624d\u4f1a\u53d1\u51fa\u8bf7\u6c42\u3002<\/p>\n
    \u5982\u679c Rd \u4ece Ru \u6536\u5230\u8fd9\u6837\u7684\u8bf7\u6c42\uff0c\u5bf9\u4e8e Rd \u5df2\u7ecf\u4e3a Ru \u5206\u53d1\u4e86\u4e00\u4e2a\u6807\u7b7e\u7684\u5730\u5740\u524d\u7f00\uff0cRd \u5e94\u5206\u914d\u4e00\u4e2a\u65b0\u7684\uff08\u4e0d\u540c\u7684\uff09\u6807\u7b7e\uff0c\u5c06\u5176\u7ed1\u5b9a\u5230 X\uff0c\u5e76\u5206\u53d1\u8be5\u7ed1\u5b9a\u3002 \uff08Rd \u662f\u5426\u53ef\u4ee5\u7acb\u5373\u5c06\u6b64\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru \u53d6\u51b3\u4e8e\u6240\u4f7f\u7528\u7684\u5206\u53d1\u7a0b\u5e8f\u3002\uff09<\/p>\n
    \u8be5\u8fc7\u7a0b\u5c06\u7531\u6b63\u5728\u6267\u884c\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\u4f46\u4e0d\u8fdb\u884c\u6807\u7b7e\u5408\u5e76\u7684 LSR \u4f7f\u7528\uff0c\u4f8b\u5982\uff0c\u4e0d\u80fd\u8fdb\u884c VC \u5408\u5e76\u7684 ATM-LSR\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.3\u3001 \u4e0a\u6e38 LSR\uff1aNotAvailable \u8fc7\u7a0b<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679cRu\u548cRd\u5206\u522b\u662f\u5730\u5740\u524d\u7f00X\u7684\u4e0a\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0cRd\u662fRu\u5bf9X\u7684L3\u4e0b\u4e00\u8df3\uff0cRu\u5411Rd\u8bf7\u6c42\u7ed1\u5b9aX\uff0c\u4f46Rd\u56de\u590d\u6b64\u65f6\u4e0d\u80fd\u63d0\u4f9b\u7ed1\u5b9a\uff0c\u56e0\u4e3a\u5b83\u6ca1\u6709 X \u7684\u4e0b\u4e00\u8df3\uff0c\u6240\u4ee5 NotAvailable \u8fc7\u7a0b\u51b3\u5b9a\u4e86 Ru \u5982\u4f55\u54cd\u5e94\u3002\u6709\u4e24\u79cd\u53ef\u80fd\u7684\u7a0b\u5e8f\u63a7\u5236 Ru \u7684\u884c\u4e3a\uff1a<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.3.1\u3001 RequestRetry<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    Ru \u5e94\u8be5\u7a0d\u540e\u518d\u6b21\u53d1\u51fa\u8bf7\u6c42\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8bf7\u6c42\u8005\u8d1f\u8d23\u7a0d\u540e\u91cd\u8bd5\u4ee5\u83b7\u53d6\u6240\u9700\u7684\u7ed1\u5b9a\u3002\u5f53\u4f7f\u7528\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\u65f6\uff0c\u5c06\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.3.2\u3001 RequestNoRetry<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    Ru \u6c38\u8fdc\u4e0d\u5e94\u8be5\u91cd\u65b0\u53d1\u51fa\u8bf7\u6c42\uff0c\u800c\u662f\u5047\u8bbe Rd \u5c06\u5728\u53ef\u7528\u65f6\u81ea\u52a8\u63d0\u4f9b\u7ed1\u5b9a\u3002\u5982\u679c Rd \u4f7f\u7528 PushUnconditional \u8fc7\u7a0b\u6216 PushConditional \u8fc7\u7a0b\uff0c\u5373\uff0c\u5982\u679c\u4f7f\u7528\u672a\u7ecf\u8bf7\u6c42\u7684\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\uff0c\u8fd9\u5c06\u5f88\u6709\u7528\u3002<\/p>\n
    \u6ce8\u610f\uff0c\u5982\u679c Rd \u56de\u590d\u8bf4\u5b83\u4e0d\u80fd\u63d0\u4f9b\u5bf9 Ru \u7684\u7ed1\u5b9a\uff0c\u662f\u56e0\u4e3a\u67d0\u4e9b\u9519\u8bef\u6761\u4ef6\uff0c\u800c\u4e0d\u662f\u56e0\u4e3a Rd \u6ca1\u6709\u4e0b\u4e00\u8df3\uff0cRu \u7684\u884c\u4e3a\u5c06\u7531\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u7684\u9519\u8bef\u6062\u590d\u6761\u4ef6\u63a7\u5236\uff0c\u800c\u4e0d\u662f\u7531NotAvailable \u7a0b\u5e8f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.4\u3001 \u4e0a\u6e38 LSR\uff1a\u91ca\u653e\u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe Rd \u662f\u4e00\u4e2a LSR\uff0c\u5b83\u5df2\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u5730\u5740\u524d\u7f00 X\uff0c\u5e76\u5c06\u8be5\u7ed1\u5b9a\u5206\u53d1\u7ed9 LSR Ru\u3002\u5982\u679c Rd \u4e0d\u662f Ru \u7684\u5730\u5740\u524d\u7f00 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0c\u6216\u8005\u5df2\u7ecf\u4e0d\u518d\u662f Ru \u7684\u5730\u5740\u524d\u7f00 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0c\u90a3\u4e48 Ru \u5c06\u4e0d\u4f1a\u4f7f\u7528\u8be5\u6807\u7b7e\u3002\u91ca\u653e\u7a0b\u5e8f\u51b3\u5b9a\u4e86 Ru \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u7684\u884c\u4e3a\u3002\u6709\u4e24\u79cd\u53ef\u80fd\u7684\u7a0b\u5e8f\u63a7\u5236 Ru \u7684\u884c\u4e3a\uff1a<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.4.1\u3001 ReleaseOnChange<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    Ru \u5e94\u8be5\u91ca\u653e\u7ed1\u5b9a\uff0c\u5e76\u901a\u77e5 Rd \u5b83\u5df2\u7ecf\u8fd9\u6837\u505a\u4e86\u3002\u6b64\u8fc7\u7a0b\u5c06\u7528\u4e8e\u5b9e\u65bd\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.4.2\u3001 NoReleaseOnChange<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    Ru \u5e94\u8be5\u4fdd\u6301\u7ed1\u5b9a\uff0c\u8fd9\u6837\u5982\u679c Rd \u7a0d\u540e\u6210\u4e3a Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0c\u5b83\u53ef\u4ee5\u7acb\u5373\u518d\u6b21\u4f7f\u7528\u5b83\u3002\u6b64\u8fc7\u7a0b\u5c06\u7528\u4e8e\u5b9e\u73b0\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.5\u3001 \u4e0a\u6e38 LSR\uff1alabelUse \u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbe Ru \u662f\u4e00\u4e2a LSR\uff0c\u5b83\u4ece LSR Rd \u6536\u5230\u4e86\u5730\u5740\u524d\u7f00 X \u7684\u6807\u7b7e\u7ed1\u5b9a L\uff0c\u5e76\u4e14 Ru \u662f Rd \u76f8\u5bf9\u4e8e X \u7684\u4e0a\u6e38\uff0c\u5b9e\u9645\u4e0a Rd \u662f Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\u3002<\/p>\n
    \u5982\u679c Rd \u662f Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0cRu \u5c06\u4f7f\u7528\u7ed1\u5b9a\u3002\u5982\u679c\u5728 Ru \u63a5\u6536\u5230\u7ed1\u5b9a\u65f6\uff0cRd \u4e0d\u662f Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0c\u5219 Ru \u4e0d\u4f7f\u7528\u8be5\u7ed1\u5b9a\u65f6\u95f4\u3002\u4f46\u662f\uff0c\u5982\u679c Rd \u6210\u4e3a Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\uff0c\u5219 Ru \u53ef\u80fd\u4f1a\u5728\u7a0d\u540e\u7684\u67d0\u4e2a\u65f6\u95f4\u5f00\u59cb\u4f7f\u7528\u7ed1\u5b9a\u3002<\/p>\n
    labelUse \u8fc7\u7a0b\u51b3\u5b9a\u4e86 Ru \u5982\u4f55\u4f7f\u7528 Rd \u7684\u7ed1\u5b9a\u3002<\/p>\n
    Ru\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u7a0b\u5e8f\uff1a<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.5.1\u3001 UseImmediate<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    Ru \u53ef\u4ee5\u7acb\u5373\u4f7f\u7528\u7ed1\u5b9a\u3002\u5728\u4efb\u4f55\u65f6\u5019\uff0c\u5f53 Ru \u4e0e\u6765\u81ea Rd \u7684 X \u7ed1\u5b9a\uff0c\u5e76\u4e14 Rd \u662f Ru \u7684 X \u7684 L3 \u4e0b\u4e00\u8df3\u65f6\uff0cRd \u4e5f\u5c06\u662f Ru \u7684 X \u7684 LSP \u4e0b\u4e00\u8df3\u3002\u5f53\u4e0d\u4f7f\u7528\u73af\u8def\u68c0\u6d4b\u65f6\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.5.2\u3001 UseIfLoopNotDetected<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u6b64\u8fc7\u7a0b\u4e0e UseImmediate \u76f8\u540c\uff0c\u9664\u975e Ru \u68c0\u6d4b\u5230 LSP \u4e2d\u5b58\u5728\u73af\u8def\u3002\u5982\u679c\u68c0\u6d4b\u5230\u73af\u8def\uff0cRu \u5c06\u505c\u6b62\u4f7f\u7528\u6807\u7b7e L \u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230 Rd\u3002<\/p>\n
    \u5728\u4f7f\u7528\u73af\u8def\u68c0\u6d4b\u65f6\u4f7f\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
    \u8fd9\u5c06\u4e00\u76f4\u6301\u7eed\u5230 X \u7684\u4e0b\u4e00\u8df3\u53d1\u751f\u53d8\u5316\uff0c\u6216\u8005\u76f4\u5230\u4e0d\u518d\u68c0\u6d4b\u5230\u73af\u8def\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.1.6\u3001 \u4e0b\u6e38 LSR\uff1a\u9000\u51fa\u7a0b\u5e8f<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ea\u6709\u4e00\u4e2a\u8fc7\u7a0b\u3002<\/p>\n
    \u5f53 LSR Rd \u51b3\u5b9a\u6253\u7834\u6807\u7b7e L \u548c\u5730\u5740\u524d\u7f00 X \u4e4b\u95f4\u7684\u7ed1\u5b9a\u65f6\uff0c\u90a3\u4e48\u8fd9\u4e2a\u89e3\u9664\u7ed1\u5b9a\u5fc5\u987b\u88ab\u5206\u53d1\u5230\u7ed1\u5b9a\u88ab\u5206\u53d1\u5230\u7684\u6240\u6709 LSR\u3002<\/p>\n
    \u5728 Rd \u5c06 L \u4e0e\u4efb\u4f55\u5176\u4ed6\u5730\u5740\u524d\u7f00 Y \u7684\u4efb\u4f55\u65b0\u7ed1\u5b9a\u5206\u53d1\u7ed9 Ru \u4e4b\u524d\uff0c\u8981\u6c42 Rd \u5c06 L \u4ece X \u7684\u89e3\u9664\u7ed1\u5b9a\u5206\u53d1\u5230 LSR Ru\uff0c\u5176\u4e2d X != Y\u3002\u5982\u679c Ru \u77e5\u9053\u65b0\u7ed1\u5b9a\u5728\u5f97\u77e5 L \u4e0e X \u89e3\u9664\u7ed1\u5b9a\u4e4b\u524d\uff0cL \u5230 Y\uff0c\u5982\u679c\u540c\u65f6\u5339\u914d X \u548c Y \u7684\u6570\u636e\u5305\u88ab Ru \u8f6c\u53d1\u5230 Rd\uff0c\u90a3\u4e48\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\uff0cRu \u4f1a\u5c06\u5339\u914d X \u7684\u6570\u636e\u5305\u548c\u5339\u914d Y \u7684\u6570\u636e\u5305\u6807\u8bb0\u4e3a\u6807\u7b7eL\u3002<\/p>\n
    \u6807\u7b7e\u7ed1\u5b9a\u7684\u5206\u53d1\u548c\u64a4\u9500\u662f\u901a\u8fc7\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u5b8c\u6210\u7684\u3002\u6240\u6709\u6807\u7b7e\u5206\u53d1\u534f\u8bae\u90fd\u8981\u6c42\u5728\u4e24\u4e2a\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff08\u9690\u5f0f\u5bf9\u7b49\u4f53\u9664\u5916\uff09\u4e4b\u95f4\u5efa\u7acb\u6807\u7b7e\u5206\u53d1\u90bb\u63a5\u3002\u5982\u679c LSR R1 \u4e0e LSR R2 \u6709\u6807\u7b7e\u5206\u914d\u90bb\u63a5\uff0c\u5e76\u4e14\u5df2\u7ecf\u901a\u8fc7\u8be5\u90bb\u63a5\u4ece LSR R2 \u63a5\u6536\u5230\u6807\u7b7e\u7ed1\u5b9a\uff0c\u90a3\u4e48\u5982\u679c\u90bb\u63a5\u88ab\u4efb\u4e00\u5bf9\u7b49\u65b9\u5173\u95ed\uff08\u65e0\u8bba\u662f\u7531\u4e8e\u6545\u969c\u8fd8\u662f\u6b63\u5e38\u64cd\u4f5c\uff09\uff0c\u6240\u6709\u901a\u8fc7\u8be5\u90bb\u63a5\u6536\u5230\u7684\u7ed1\u5b9a\u5fc5\u987b\u88ab\u89c6\u4e3a\u5df2\u88ab\u64a4\u6d88\u3002<\/p>\n
    \u53ea\u8981\u76f8\u5173\u7684\u6807\u7b7e\u5206\u914d\u90bb\u63a5\u4ecd\u7136\u5b58\u5728\uff0c\u88ab\u64a4\u56de\u7684\u6807\u7b7e\u7ed1\u5b9a\u5fc5\u987b\u59cb\u7ec8\u660e\u786e\u64a4\u56de\u3002\u5982\u679c\u7b2c\u4e8c\u4e2a\u6807\u7b7e\u7ed1\u5b9a\u4e00\u4e2a\u5730\u5740\u524d\u7f00\uff0c\u7ed3\u679c\u4e0d\u662f\u9690\u5f0f\u64a4\u56de\u7b2c\u4e00\u4e2a\u6807\u7b7e\uff0c\u800c\u662f\u7ed1\u5b9a\u4e24\u4e2a\u6807\u7b7e\uff1b\u8fd9\u662f\u652f\u6301\u591a\u8def\u5f84\u8def\u7531\u6240\u5fc5\u9700\u7684\u3002\u5982\u679c\u7b2c\u4e8c\u4e2a\u5730\u5740\u524d\u7f00\u7ed1\u5b9a\u5230\u4e00\u4e2a\u6807\u7b7e\uff0c\u7ed3\u679c\u4e0d\u662f\u9690\u5f0f\u64a4\u6d88\u8be5\u6807\u7b7e\u4e0e\u7b2c\u4e00\u4e2a\u5730\u5740\u524d\u7f00\u7684\u7ed1\u5b9a\uff0c\u800c\u662f\u5c06\u8be5\u6807\u7b7e\u7528\u4e8e\u4e24\u4e2a\u5730\u5740\u524d\u7f00\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.2\u3001 MPLS \u65b9\u6848\uff1a\u652f\u6301\u7684\u7a0b\u5e8f\u7ec4\u5408<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u8003\u8651\u4e24\u4e2a LSR\uff0cRu \u548c Rd\uff0c\u5b83\u4eec\u662f\u5173\u4e8e\u67d0\u4e9b\u5730\u5740\u524d\u7f00\u96c6\u7684\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u5176\u4e2d Ru \u662f\u4e0a\u6e38\u5bf9\u7b49\u4f53\uff0cRd \u662f\u4e0b\u6e38\u5bf9\u7b49\u4f53\u3002<\/p>\n
    \u7ba1\u7406Ru\u548cRd\u4ea4\u4e92\u7684MPLS\u65b9\u6848\u53ef\u4ee5\u63cf\u8ff0\u4e3a\u4e94\u7ec4\u8fc7\u7a0b\uff1a<\u5206\u53d1\u8fc7\u7a0b\u3001\u8bf7\u6c42\u8fc7\u7a0b\u3001\u4e0d\u53ef\u7528\u8fc7\u7a0b\u3001\u91ca\u653e\u8fc7\u7a0b\u3001\u6807\u7b7e\u4f7f\u7528\u8fc7\u7a0b>\u3002 \uff08\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2a\u63d0\u6b3e\u7a0b\u5e8f\uff0c\u6240\u4ee5\u4e0d\u5fc5\u63d0\u53ca\u3002\uff09\u51fa\u73b0\u5728\u5176\u4e2d\u4e00\u4e2a\u4f4d\u7f6e\u7684\u201c*\u201d\u662f\u4e00\u4e2a\u901a\u914d\u7b26\uff0c\u8868\u793a\u8be5\u7c7b\u522b\u4e2d\u7684\u4efb\u4f55\u7a0b\u5e8f\u90fd\u53ef\u80fd\u5b58\u5728\uff1b\u51fa\u73b0\u5728\u7279\u5b9a\u4f4d\u7f6e\u7684\u201cN\/A\u201d\u8868\u793a\u4e0d\u9700\u8981\u8be5\u7c7b\u522b\u4e2d\u7684\u7a0b\u5e8f\u3002<\/p>\n
    MPLS \u4f53\u7cfb\u7ed3\u6784\u4ec5\u652f\u6301\u4ee5\u4e0b\u6307\u5b9a\u7684 MPLS \u65b9\u6848\u3002\u5982\u679c\u663e\u793a\u9700\u8981\u5b83\u4eec\uff0c\u5c06\u6765\u53ef\u80fd\u4f1a\u6dfb\u52a0\u5176\u4ed6\u65b9\u6848\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.2.1\u3001 \u652f\u6301\u6807\u7b7e\u5408\u5e76\u7684LSR\u65b9\u6848<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5982\u679cRu\u548cRd\u662f\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\uff0c\u5e76\u4e14\u90fd\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u5219\u5fc5\u987b\u91c7\u7528\u4ee5\u4e0b\u65b9\u6848\u4e4b\u4e00\uff1a<\/p>\n
    \n
    1. <PushUnconditional\u3001RequestNever\u3001N<\/span>\/A<\/span>\u3001NoReleaseOnChange<\/span>\u3001UseImmediate<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u5177\u6709\u72ec\u7acb\u63a7\u5236\u3001\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u548c\u65e0\u73af\u8def\u68c0\u6d4b\u7684\u4e3b\u52a8\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\u3002<\/p>\n
    \n
    2. <PushUnconditional\u3001RequestNever\u3001N<\/span>\/A<\/span>\u3001NoReleaseOnChange<\/span>\u3001UseIfLoopNotDetected<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u5177\u6709\u72ec\u7acb\u63a7\u5236\u3001\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u548c\u73af\u8def\u68c0\u6d4b\u7684\u4e3b\u52a8\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\u3002<\/p>\n
    \n
    3. <PushConditional,<\/span> RequestWhenNeeded<\/span>, RequestNoRetry<\/span>, ReleaseOnChange<\/span>, *><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e3b\u52a8\u63d0\u4f9b\u7684\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u6709\u5e8f\u63a7\u5236\uff08\u4ece\u51fa\u53e3\uff09\u548c\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u3002\u73af\u8def\u68c0\u6d4b\u662f\u53ef\u9009\u7684\u3002<\/p>\n
    \n
    4. <PushConditional,<\/span> RequestNever<\/span>, N<\/span>\/A<\/span>, NoReleaseOnChange<\/span>, *><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e3b\u52a8\u63d0\u4f9b\u7684\u4e0b\u6e38\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u6709\u5e8f\u63a7\u5236\uff08\u4ece\u51fa\u53e3\uff09\u548c\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u3002\u73af\u8def\u68c0\u6d4b\u662f\u53ef\u9009\u7684\u3002<\/p>\n
    \n
    5. <PulledConditional,<\/span> RequestWhenNeeded<\/span>, RequestRetry<\/span>, ReleaseOnChange<\/span>, *><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u6709\u5e8f\u63a7\u5236\uff08\u7531\u5165\u53e3\u542f\u52a8\uff09\u3001\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u548c\u53ef\u9009\u7684\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    \n
    6. <PulledUnconditional\u3001RequestWhenNeeded\u3001N<\/span>\/A<\/span>\u3001ReleaseOnChange<\/span>\u3001UseImmediate<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u72ec\u7acb\u63a7\u5236\u548c\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\uff0c\u6ca1\u6709\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    \n
    7. <PulledUnconditional\u3001RequestWhenNeeded\u3001N<\/span>\/A<\/span>\u3001ReleaseOnChange<\/span>\u3001UseIfLoopNotDetected<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u5177\u6709\u72ec\u7acb\u63a7\u5236\u548c\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u7684\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.2.2\u3001 \u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\u7684 LSR \u65b9\u6848<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5047\u8bbeR1\u3001R2\u3001R3\u548cR4\u662fATM\u4ea4\u6362\u673a\uff0c\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u4f46\u4f5c\u4e3aLSR\u4f7f\u7528\u3002\u8fdb\u4e00\u6b65\u5047\u8bbe\u5730\u5740\u524d\u7f00 X \u7684 L3 \u9010\u8df3\u8def\u5f84\u662f <R1, R2, R3, R4>\uff0c\u5e76\u4e14\u76ee\u7684\u5730\u4e3a X \u7684\u6570\u636e\u5305\u53ef\u4ee5\u4ece\u8fd9\u4e9b LSR \u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u8fdb\u5165\u7f51\u7edc\u3002\u7531\u4e8e\u6ca1\u6709\u591a\u70b9\u5bf9\u70b9\u7684\u80fd\u529b\uff0cLSP\u5fc5\u987b\u5b9e\u73b0\u4e3a\u70b9\u5bf9\u70b9\u7684VC\uff0c\u8fd9\u610f\u5473\u7740\u5730\u5740\u524d\u7f00X\u9700\u8981\u4e09\u4e2a\u8fd9\u6837\u7684VC\uff1a<R1, R2, R3, R4>, < R2\u3001R3\u3001R4> \u548c <R3\u3001R4>\u3002<\/p>\n
    \u56e0\u6b64\uff0c\u5982\u679c R1 \u548c R2 \u662f MPLS \u5bf9\u7b49\u4f53\uff0c\u5e76\u4e14\u662f\u4f7f\u7528\u4f20\u7edf ATM \u4ea4\u6362\u786c\u4ef6\uff08\u5373\u6ca1\u6709\u4fe1\u5143\u4ea4\u7ec7\u6291\u5236\uff09\u5b9e\u73b0\u7684 LSR\uff0c\u6216\u8005\u4e0d\u80fd\u6267\u884c\u6807\u7b7e\u5408\u5e76\uff0c\u5219 R1 \u548c R2 \u4e4b\u95f4\u4f7f\u7528\u7684 MPLS \u65b9\u6848\u5fc5\u987b\u662f\u4ee5\u4e0b\u4e4b\u4e00\uff1a<\/p>\n
    \n
    1. <PulledConditional,<\/span> RequestOnRequest<\/span>, RequestRetry<\/span>, ReleaseOnChange<\/span>, *><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u6709\u5e8f\u63a7\u5236\uff08\u7531\u5165\u53e3\u542f\u52a8\uff09\u3001\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u548c\u53ef\u9009\u7684\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    RequestOnRequest \u8fc7\u7a0b\u7684\u4f7f\u7528\u5c06\u5bfc\u81f4 R4 \u5c06 X \u7684\u4e09\u4e2a\u6807\u7b7e\u5206\u53d1\u7ed9 R3\uff1b R3 \u5c06 X \u7684 2 \u4e2a\u6807\u7b7e\u5206\u53d1\u7ed9 R2\uff0cR2 \u5c06 X \u7684\u4e00\u4e2a\u6807\u7b7e\u5206\u53d1\u7ed9 R1\u3002<\/p>\n
    \n
    2. <PulledUnconditional\u3001RequestOnRequest\u3001N<\/span>\/A<\/span>\u3001ReleaseOnChange<\/span>\u3001UseImmediate<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u72ec\u7acb\u63a7\u5236\u548c\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\uff0c\u6ca1\u6709\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    \n
    3. <PulledUnconditional\u3001RequestOnRequest\u3001N<\/span>\/A<\/span>\u3001ReleaseOnChange<\/span>\u3001UseIfLoopNotDetected<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u8fd9\u662f\u5177\u6709\u72ec\u7acb\u63a7\u5236\u548c\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u7684\u4e0b\u6e38\u6309\u9700\u6807\u7b7e\u5206\u53d1\uff0c\u5177\u6709\u73af\u8def\u68c0\u6d4b\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    5.2.3\u3001 \u4e92\u64cd\u4f5c\u6027\u6ce8\u610f\u4e8b\u9879<\/strong><\/span><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f88\u5bb9\u6613\u770b\u51fa\u67d0\u4e9b\u4e94\u5143\u7ec4\u4e0d\u4f1a\u4ea7\u751f\u53ef\u884c\u7684 MPLS \u65b9\u6848\u3002\u4f8b\u5982\uff1a<\/p>\n
    \n
    - <PulledUnconditional,<\/span> RequestNever<\/span>, *, *, *><\/span><\/span><\/code><PulledConditional,<\/span> RequestNever<\/span>, *, *, *><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u5728\u8fd9\u4e9b MPLS \u65b9\u6848\u4e2d\uff0c\u4e0b\u6e38 LSR Rd \u4ec5\u6839\u636e Ru \u7684\u8bf7\u6c42\u5411\u4e0a\u6e38 LSR Ru \u5206\u53d1\u6807\u7b7e\u7ed1\u5b9a\uff0c\u4f46 Ru \u4ece\u672a\u53d1\u51fa\u4efb\u4f55\u6b64\u7c7b\u8bf7\u6c42\u3002\u663e\u7136\uff0c\u8fd9\u4e9b\u65b9\u6848\u662f\u4e0d\u53ef\u884c\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u4e0d\u4f1a\u5bfc\u81f4\u6807\u7b7e\u7ed1\u5b9a\u7684\u6b63\u786e\u5206\u5e03\u3002<\/p>\n
    \n
    - <*,<\/span> RequestNever<\/span>, *, *, ReleaseOnChange<\/span>><\/span><\/span><\/code><\/pre>\n<\/section>\n
    \u5728\u8fd9\u4e9b MPLS \u65b9\u6848\u4e2d\uff0cRd \u5728\u4e0d\u4f7f\u7528\u7ed1\u5b9a\u65f6\u91ca\u653e\u7ed1\u5b9a\uff0c\u4f46\u5b83\u6c38\u8fdc\u4e0d\u4f1a\u518d\u6b21\u8bf7\u6c42\u5b83\u4eec\uff0c\u5373\u4f7f\u5b83\u4ee5\u540e\u9700\u8981\u5b83\u4eec\u3002\u56e0\u6b64\uff0c\u8fd9\u4e9b\u65b9\u6848\u4e0d\u80fd\u786e\u4fdd\u6807\u7b7e\u7ed1\u5b9a\u5f97\u5230\u6b63\u786e\u5206\u5e03\u3002<\/p>\n
    \u5728\u672c\u8282\u4e2d\uff0c\u6211\u4eec\u6307\u5b9a\u89c4\u5219\u4ee5\u9632\u6b62\u4e00\u5bf9\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u4f53\u91c7\u7528\u5bfc\u81f4\u4e0d\u53ef\u884c MPLS \u65b9\u6848\u7684\u7a0b\u5e8f\u3002\u8fd9\u4e9b\u89c4\u5219\u9700\u8981\u5728\u6807\u7b7e\u5206\u53d1\u90bb\u63a5\u7684\u521d\u59cb\u5316\u671f\u95f4\u5728\u6807\u7b7e\u5206\u53d1\u5bf9\u7b49\u65b9\u4e4b\u95f4\u4ea4\u6362\u4fe1\u606f\uff0c\u6216\u8005\u9700\u8981\u4fe1\u606f\u7684\u5148\u9a8c\u77e5\u8bc6\uff08\u901a\u8fc7\u672c\u6587\u6863\u8303\u56f4\u4e4b\u5916\u7684\u65b9\u5f0f\u83b7\u5f97\uff09\u3002<\/p>\n
    1. \u6bcf\u4e2a\u90fd\u5fc5\u987b\u8bf4\u660e\u662f\u5426\u652f\u6301\u6807\u7b7e\u5408\u5e76\u3002<\/strong><\/p>\n
    2. \u5982\u679cRd\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0cRd\u5fc5\u987b\u9009\u62e9PulledUnconditional\u8fc7\u7a0b\u6216PulledConditional\u8fc7\u7a0b\u3002\u5982\u679c Rd \u9009\u62e9 PulledConditional\uff0c\u5219 Ru \u5c06\u88ab\u8feb\u4f7f\u7528 RequestRetry \u8fc7\u7a0b\u3002<\/strong><\/p>\n
    \u5373\u5982\u679c\u4e0b\u6e38LSR\u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u5219\u5728\u9009\u62e9MPLS\u65b9\u6848\u65f6\u4f18\u5148\u8003\u8651\u5176\u4f18\u5148\u7ea7\u3002<\/p>\n
    3. \u5982\u679c Ru \u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u4f46 Rd \u652f\u6301\uff0cRu \u5fc5\u987b\u9009\u62e9 RequestRetry \u6216 RequestNoRetry \u8fc7\u7a0b\u3002\u8fd9\u4f1a\u5f3a\u5236 Rd \u5206\u522b\u4f7f\u7528 PulledConditional \u6216 PulledUnConditional \u8fc7\u7a0b\u3002<\/strong><\/p>\n
    \u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u53ea\u6709\u4e00\u4e2a LSR \u4e0d\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u5219\u5728\u9009\u62e9 MPLS \u65b9\u6848\u65f6\uff0c\u5176\u504f\u597d\u4f18\u5148\u3002<\/p>\n
    4. \u5982\u679cRu\u548cRd\u90fd\u652f\u6301\u6807\u7b7e\u5408\u5e76\uff0c\u90a3\u4e48\u81ea\u7531\u548c\u4fdd\u5b88\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\u7684\u9009\u62e9\u5c5e\u4e8eRu\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cRu \u53ef\u4ee5\u9009\u62e9\u4f7f\u7528 RequestWhenNeeded\/ReleaseOnChange\uff08\u4fdd\u5b88\uff09\uff0c\u6216\u4f7f\u7528 RequestNever\/NoReleaseOnChange\uff08\u81ea\u7531\uff09\u3002\u4f46\u662f\uff0c\u201c\u63a8\u201d\u4e0e\u201c\u62c9\u201d\u548c\u201c\u6709\u6761\u4ef6\u201d\u4e0e\u201c\u65e0\u6761\u4ef6\u201d\u7684\u9009\u62e9\u5c5e\u4e8eRd\u3002\u5982\u679c Ru \u9009\u62e9\u81ea\u7531\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\uff0cRd \u53ef\u4ee5\u9009\u62e9 PushUnconditional \u6216 PushConditional\u3002\u5982\u679c Ru \u9009\u62e9\u4fdd\u5b88\u7684\u6807\u7b7e\u4fdd\u7559\u6a21\u5f0f\uff0cRd \u53ef\u4ee5\u9009\u62e9 PushConditional\u3001PulledConditional \u6216 PulledUnconditional\u3002<\/strong><\/p>\n
    \u8fd9\u4e9b\u9009\u62e9\u5171\u540c\u51b3\u5b9a\u4e86\u4f7f\u7528\u7684 MPLS \u65b9\u6848\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    6\u3001 \u5b89\u5168\u8003\u8651<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u4e00\u4e9b\u8def\u7531\u5668\u53ef\u80fd\u5b9e\u73b0\u7684\u5b89\u5168\u7a0b\u5e8f\u4f9d\u8d56\u4e8e\u76f8\u5bf9\u4e8e\u6570\u636e\u94fe\u8def\u5c42\u5934\u90e8\u4f4d\u4e8e\u56fa\u5b9a\u4f4d\u7f6e\u7684\u7f51\u7edc\u5c42\u5934\u90e8\u3002 MPLS \u901a\u7528\u5c01\u88c5\u5728\u6570\u636e\u94fe\u8def\u5c42\u62a5\u6587\u5934\u548c\u7f51\u7edc\u5c42\u62a5\u6587\u5934\u4e4b\u95f4\u63d2\u5165\u4e86\u4e00\u4e2a shim\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4efb\u4f55\u6b64\u7c7b\u5b89\u5168\u7a0b\u5e8f\u5931\u8d25\u3002<\/p>\n
    MPLS \u6807\u7b7e\u7684\u542b\u4e49\u53d6\u51b3\u4e8e\u5c06\u6807\u7b7e\u653e\u5165\u6807\u7b7e\u5806\u6808\u7684 LSR\uff08\u201c\u6807\u7b7e\u7f16\u5199\u5668\u201d\uff09\u548c\u89e3\u91ca\u8be5\u6807\u7b7e\u7684 LSR\uff08\u201c\u6807\u7b7e\u9605\u8bfb\u5668\u201d\uff09\u4e4b\u95f4\u7684\u534f\u8bae\u3002\u5982\u679c\u4ece\u4e0d\u53d7\u4fe1\u4efb\u7684\u6765\u6e90\u63a5\u53d7\u4e86\u5e26\u6807\u7b7e\u7684\u6570\u636e\u5305\uff0c\u6216\u8005\u5982\u679c\u67d0\u4e2a\u7279\u5b9a\u7684\u4f20\u5165\u6807\u7b7e\u4ece\u8be5\u6807\u7b7e\u5c1a\u672a\u5206\u53d1\u5230\u7684 LSR \u4e2d\u88ab\u63a5\u53d7\uff0c\u5219\u6570\u636e\u5305\u53ef\u80fd\u4f1a\u4ee5\u975e\u6cd5\u65b9\u5f0f\u8def\u7531\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    7\u3001 \u77e5\u8bc6\u4ea7\u6743<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    IETF \u5df2\u83b7\u77e5\u4e0e\u672c\u6587\u6863\u4e2d\u5305\u542b\u7684\u90e8\u5206\u6216\u5168\u90e8\u89c4\u8303\u76f8\u5173\u7684\u77e5\u8bc6\u4ea7\u6743\u3002\u6709\u5173\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u5df2\u58f0\u660e\u6743\u5229\u7684\u5728\u7ebf\u5217\u8868\u3002<\/p>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    8\u3001 \u53c2\u8003\u6587\u732e<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \n
    [MPLS-ATM<\/span>] Davie, B., Lawrence, J., McCloghrie, K., Rekhter, Y., Rosen, E., Swallow, G. and P. Doolan, \"MPLS using LDP and ATM VC Switching\"<\/span>, RFC 3035<\/span>, January 2001.<\/span><\/span><\/code>[MPLS-BGP<\/span>] \"Carrying Label Information in BGP-4\"<\/span>, Rekhter, Rosen, Work in<\/span> Progress.<\/span><\/code>[MPLS-CR-LDP<\/span>] \"Constraint-Based LSP Setup using LDP\"<\/span>, Jamoussi, Editor, Work in<\/span> Progress.<\/span><\/code>[MPLS-FRMRLY<\/span>] Conta, A., Doolan, P. and A. Malis, \"Use of Label Switching on Frame Relay Networks Specification\"<\/span>, RFC 3034<\/span>, January 2001.<\/span><\/span><\/code>[MPLS-LDP<\/span>] Andersson, L., Doolan, P., Feldman, N., Fredette, A. and B. Thomas, \"LDP Specification\"<\/span>, RFC 3036<\/span>, January 2001.<\/span><\/span><\/code>[MPLS-RSVP-TUNNELS<\/span>] \"Extensions to RSVP for LSP Tunnels\"<\/span>, Awduche, Berger, Gan, Li, Swallow, Srinvasan, Work in<\/span> Progress.<\/span><\/code>[MPLS-SHIM<\/span>] Rosen, E., Rekhter, Y., Tappan, D., Fedorkow, G., Farinacci, D. and A. Conta, \"MPLS Label Stack Encoding\"<\/span>, RFC 3032<\/span>, January 2001.<\/span><\/span><\/code>[MPLS-TRFENG<\/span>] Awduche, D., Malcolm, J., Agogbua, J., O'Dell, M. and J. McManus, \"Requirements for Traffic Engineering Over MPLS\", RFC 2702, September 1999.<\/span><\/span><\/code><\/pre>\n<\/section>\n
    \n
    \n
    \n
    <\/div><\/section>\n
    9\u3001 \u5b8c\u6574\u7684\u7248\u6743\u58f0\u660e<\/strong><\/span><\/section>\n
    <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7248\u6743\u6240\u6709 (C) \u4e92\u8054\u7f51\u534f\u4f1a (2001)\u3002\u7248\u6743\u6240\u6709\u3002<\/p>\n
    \u672c\u6587\u4ef6\u53ca\u5176\u8bd1\u6587\u53ef\u80fd\u4f1a\u88ab\u590d\u5236\u548c\u63d0\u4f9b\u7ed9\u4ed6\u4eba\uff0c\u5e76\u4e14\u53ef\u4ee5\u5168\u90e8\u6216\u90e8\u5206\u5730\u51c6\u5907\u3001\u590d\u5236\u3001\u51fa\u7248\u548c\u5206\u53d1\u5bf9\u5176\u8fdb\u884c\u8bc4\u8bba\u6216\u4ee5\u5176\u4ed6\u65b9\u5f0f\u89e3\u91ca\u6216\u534f\u52a9\u5176\u5b9e\u65bd\u7684\u884d\u751f\u4f5c\u54c1\uff0c\u4e0d\u53d7\u4efb\u4f55\u9650\u5236\uff0c\u524d\u63d0\u662f\u4e0a\u8ff0\u7248\u6743\u58f0\u660e\u548c\u672c\u6bb5\u5305\u542b\u5728\u6240\u6709\u6b64\u7c7b\u526f\u672c\u548c\u884d\u751f\u4f5c\u54c1\u4e2d\u3002\u4f46\u662f\uff0c\u4e0d\u5f97\u4ee5\u4efb\u4f55\u65b9\u5f0f\u4fee\u6539\u672c\u6587\u6863\u672c\u8eab\uff0c\u4f8b\u5982\u901a\u8fc7\u5220\u9664\u7248\u6743\u58f0\u660e\u6216\u5bf9 Internet \u534f\u4f1a\u6216\u5176\u4ed6 Internet \u7ec4\u7ec7\u7684\u5f15\u7528\uff0c\u9664\u975e\u51fa\u4e8e\u5236\u5b9a Internet \u6807\u51c6\u7684\u9700\u8981\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7248\u6743\u7a0b\u5e8f\u5b9a\u4e49\u5728\u5fc5\u987b\u9075\u5faa Internet \u6807\u51c6\u6d41\u7a0b\uff0c\u6216\u6309\u7167\u8981\u6c42\u5c06\u5176\u7ffb\u8bd1\u6210\u82f1\u8bed\u4ee5\u5916\u7684\u8bed\u8a00\u3002<\/p>\n
    \u4e0a\u8ff0\u6388\u4e88\u7684\u6709\u9650\u6743\u9650\u662f\u6c38\u4e45\u6027\u7684\uff0c\u4e0d\u4f1a\u88ab\u4e92\u8054\u7f51\u534f\u4f1a\u6216\u5176\u7ee7\u4efb\u8005\u6216\u53d7\u8ba9\u4eba\u64a4\u9500\u3002<\/p>\n
    \u672c\u6587\u6863\u548c\u5176\u4e2d\u5305\u542b\u7684\u4fe1\u606f\u6309\u201c\u539f\u6837\u201d\u63d0\u4f9b\uff0c\u4e92\u8054\u7f51\u534f\u4f1a\u548c\u4e92\u8054\u7f51\u5de5\u7a0b\u5de5\u4f5c\u961f\u4e0d\u63d0\u4f9b\u6240\u6709\u660e\u793a\u6216\u6697\u793a\u7684\u4fdd\u8bc1\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u4efb\u4f55\u4fdd\u8bc1\uff0c\u5373\u4f7f\u7528\u6b64\u5904\u7684\u4fe1\u606f\u4e0d\u4f1a\u4fb5\u72af\u4efb\u4f55\u6709\u5173\u9002\u9500\u6027\u6216\u7279\u5b9a\u7528\u9014\u9002\u7528\u6027\u7684\u6743\u5229\u6216\u4efb\u4f55\u9ed8\u793a\u4fdd\u8bc1\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
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