{"id":9918,"date":"2022-05-17T18:20:50","date_gmt":"2022-05-18T01:20:50","guid":{"rendered":"https:\/\/www.xh86.me\/?p=9918"},"modified":"2022-05-17T18:20:50","modified_gmt":"2022-05-18T01:20:50","slug":"%e7%bd%91%e5%b7%a5%e4%ba%a4%e6%8d%a2%e5%9f%ba%e7%a1%80%ef%bc%886%ef%bc%89stp%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=9918","title":{"rendered":"\u7f51\u5de5\u4ea4\u6362\u57fa\u7840\uff086\uff09STP\u534f\u8bae"},"content":{"rendered":"
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STP\u5de5\u4f5c\u539f\u7406<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

\n<\/section>\n

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STP\u80fd\u591f\u68c0\u6d4b\u5e76\u9632\u6b622\u5c42\u6865\u63a5\u73af\u8def\u7684\u5f62\u6210\u3002\u53ef\u4ee5\u5b58\u5728\u591a\u6761\u5e76\u884c\u7684\u8def\u5f84\uff0c\u4f46\u53ea\u4f7f\u7528\u4e00\u6761\u8def\u5f84\u6765\u8f6c\u53d1\u6570\u636e\u5e27\uff0c\u5e76<\/span>\u57fa\u4e8eIEEE 802.1D\u6865\u534f\u8bae\u6807\u51c6\u3002<\/span><\/p>\n

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  • \n

    802.1w\u4f5c\u4e3a\u4e00\u79cd\u589e\u5f3a\u7684\u751f\u6210\u6811\uff0c\u5728\u62d3\u6251\u53d1\u751f\u53d8\u5316\u65f6\u53ef\u63d0\u4f9b\u6bd4\u4f20\u7edf\u751f\u6210\u6811\u66f4\u5feb\u7684\u6536\u655b\u901f\u5ea6\u3002<\/span><\/p>\n<\/li>\n

  • \n

    Cisco\u4ea4\u6362\u673a\u5728PVST+\uff08\u6bcf VLAN \u751f\u6210\u6811\uff09\u6216Rapid-PVST+\uff08\u5feb\u901f\u6bcfVLAN \u751f\u6210\u6811\uff09\u4e2d\u4e3a\u6bcf\u4e2aVLAN\u8fd0\u884c\u5355\u72ec\u7684 STP \u5b9e\u4f8b\uff08instance\uff09\u3002\u8fd0\u884cRPVST\u7684\u4ea4\u6362\u673a\u4e4b\u95f4\u9700\u8981\u914d\u7f6e Trunking\u3002<\/span><\/p>\n<\/li>\n

  • \n

    \u5bf9\u4e8e\u5de5\u4e1a\u6807\u51c6 IEEE 802.1Q\u7684Trunk\u94fe\u8def\u6765\u8bf4\uff0c\u6240\u6709\u7684 VLAN\u53ea\u9700\u4e00\u4e2aSTP \u5b9e\u4f8b\u3002\u516c\u5171\u751f\u6210\u6811\uff08CST\uff09\u4f7f\u7528VLAN 1\u901a\u4fe1\u3002<\/span><\/p>\n<\/li>\n

  • \n

    PVST+\u4f5c\u4e3aCisco\u79c1\u6709\u7684\u6269\u5c55\u6280\u672f\uff0c\u5141\u8bb8\u4ea4\u6362\u673a\u5728CST\u4e0ePVST\u4e4b\u95f4\u4e92\u64cd\u4f5c\u3002PVST\u6865\u534f\u8bae\u6570\u636e\u5355\u5143\uff08BPDU\uff09\u5728802.1Q Trunk\u94fe\u8def\u4e0a\u4ee5\u96a7\u9053\u65b9\u5f0f\u4f20\u8f93\u3002Catalyst\u4ea4\u6362\u673a\u9ed8\u8ba4\u8fd0\u884cPVST+\u3002<\/span><\/p>\n<\/li>\n

  • \n

    \u5feb\u901fPVST+\u662f\u4e00\u79cd\u6df7\u5408\u6a21\u5f0f\u7684STP\uff0c\u5176\u4f7f\u7528\u4e86\u7ed3\u5408\u4e86 PVST\u57fa\u7840\u7684IEEE 802.1w\uff08\u5feb\u901f\u751f\u6210\u6811\uff09\u3002\u5feb\u901fPVST+\u517c\u5bb9IEEE 802.1w\uff0c\u4f46\u987b\u4f7f\u7528Cisco\u6269\u5c55\u6280\u672f\u6765\u652f\u6301\u6bcfVLAN\u751f\u6210\u6811\u3002<\/span><\/p>\n<\/li>\n

  • \n

    \u57fa\u4e8eIEEE 802.1s\u6807\u51c6\u7684\u591a\u751f\u6210\u6811\uff08MST\uff09\u5bf9802.1w RSTP\u8fdb\u884c\u6269\u5c55\uff0c\u4f7f\u5176\u62e5\u6709\u591a\u4e2aSTP\u5b9e\u4f8b\u3002<\/span><\/p>\n

    a. MST\u5411\u4e0b\u517c\u5bb9802.1D\u3001802.1w\u53caPVST+\u6a21\u5f0f\u7684STP\u3002<\/span><\/p>\n

    b. \u4f7f\u7528\u516c\u5171VLAN\u548cSTP\u5b9e\u4f8b\u7684\u591a\u4e2a\u4ea4\u6362\u673a\u7ec4\u6210\u4e00\u4e2aMST\u533a\u57df\u3002<\/span><\/p>\n

    c. MST\u53ef\u4ea7\u751fPVST+\u7684BPDU\uff0c\u7528\u6765\u5b9e\u73b0\u534f\u8bae\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u3002<\/span><\/p>\n

    d. MST\u652f\u6301\u6700\u591a16\u4e2aSTP\u5b9e\u4f8b\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/section>\n<\/section>\n<\/section>\n

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    • \n

      \u4ea4\u6362\u673a\u5728\u6bcf\u4e2aHello\u65f6\u95f4\u95f4\u9694\uff08\u9ed8\u8ba42\u79d2\uff09\u90fd\u4f1a\u5411\u6240\u6709\u63a5\u53e3\u53d1\u9001BPDU\u3002<\/span><\/p>\n<\/li>\n

    • \n

      BPDU\u4e0d\u80fd\u88ab\u4ea4\u6362\u673a\u76f4\u63a5\u8f6c\u53d1\uff0c\u5176\u7528\u4e8e\u8fdb\u4e00\u6b65\u8ba1\u7b97\u5e76\u4ea7\u751f\u65b0\u7684 BPDU\u3002<\/span><\/p>\n<\/li>\n

    • \n

      \u4ea4\u6362\u673a\u53d1\u9001\u4e24\u79cd\u7c7b\u578b\u7684BPDU\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/section>\n

      \u00a0\u00a0\u00a0 a.\u914d\u7f6eBPDU\u3002<\/span><\/p>\n

      \u00a0\u00a0\u00a0 b.\u62d3\u6251\u53d8\u66f4\u901a\u544a\uff08TCN\uff09BPDU\u3002<\/span><\/p>\n

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      <\/section>\n
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      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      STP\u6d41\u7a0b<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      01 \u9009\u4e3e\u6839\u6865<\/span><\/strong><\/p>\n

      \n

      \u6865ID\u6700\u5c0f\u7684\u4ea4\u6362\u673a\u5c06\u6210\u4e3a\u751f\u6210\u6811\u7684\u6839\u6865\u3002\u6865 ID\uff08BID\uff09\u7531\u4e24\u5b57\u8282\u7684\u4f18\u5148\u7ea7\u5b57\u6bb5\u548c6\u5b57\u8282\u7684MAC\u5730\u5740\u7ec4\u6210\u3002\u4f18\u5148\u7ea7\u5b57\u6bb5\u8303\u56f4\u4e3a0\uff5e65535\uff0c\u9ed8\u8ba4\u662f32768\u3002<\/span><\/p>\n

      \n

      02 \u9009\u4e3e\u6839\u7aef\u53e3<\/span><\/strong><\/p>\n

      \n

      \u6bcf\u53f0\u975e\u6839\u6865\u4ea4\u6362\u673a\u4e0a\u5c06\u9009\u4e3e\u51fa\u4e00\u4e2a\u6839\u7aef\u53e3\uff0c\u6216\u79f0\u4e3a\u79bb\u6839\u6865\u201c\u6700\u8fd1\u201d\u7684\u7aef\u53e3\u3002\u201c\u6700\u8fd1\u201d\u6307\u7aef\u53e3\u5e26\u6709\u6700\u4f4e\u7684\u6839\u8def\u5f84\u5f00\u9500\u503c\u3002\u5f00\u9500\u503c\u643a\u5e26\u4e8eBPDU\u4e2d\u3002\u6cbf\u8def\u4e0a\u6bcf\u53f0\u975e\u6839\u6865\u4ea4\u6362\u673a\u90fd\u4f1a\u5728BPDU\u7684\u5165\u7ad9\u7aef\u53e3\u4e0a\u589e\u52a0\u672c\u5730\u7aef\u53e3\u5f00\u9500\u503c\u3002<\/span>\u968f\u7740\u65b0\u7684BPDU\u7684\u4ea7\u751f\uff0c\u6839\u8def\u5f84\u503c\u5f00\u9500\u9010\u6e10\u7d2f\u79ef\u3002<\/span><\/p>\n

      \n

      03 \u9009\u4e3e\u6307\u5b9a\u7aef\u53e3<\/span><\/strong><\/p>\n

      \n

      \u5728\u6bcf\u4e2a\u7f51\u6bb5\u4e0a\uff0c\u5176\u4e2d\u4e00\u53f0\u4ea4\u6362\u673a\u7684\u7aef\u53e3\u5c06\u9009\u4e3e\u6210\u4e3a\u6307\u5b9a\u7aef\u53e3\uff0c\u7528\u4e8e\u5904\u7406\u6b64\u7f51\u6bb5\u7684\u6d41\u91cf\uff0c\u7f51\u6bb5\u4e2d\u5ba3\u544a\u6700\u4f4e\u6839\u8def\u5f84\u5f00\u9500\u7684\u7aef\u53e3\u9009\u4e3e\u6210\u4e3a\u6307\u5b9a\u7aef\u53e3\u3002<\/span><\/p>\n

      \n

      04 \u79fb\u9664\u6865\u63a5\u73af\u8def<\/span><\/strong><\/p>\n

      \n

      \u65e2\u4e0d\u662f\u6839\u7aef\u53e3\u53c8\u4e0d\u662f\u6307\u5b9a\u7aef\u53e3\u7684\u4ea4\u6362\u673a\u7aef\u53e3\u5c06\u88ab\u7f6e\u4e8e\u963b\u585e\u72b6\u6001\u3002\u6b64\u6b65\u9aa4\u5c06\u4e2d\u65ad\u6240\u6709\u6865\u63a5\u73af\u8def\uff0c\u5426\u5219\uff0c\u5c06\u4f1a\u5f62\u6210\u73af\u8def\u3002<\/span><\/p>\n

      \n

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      <\/section>\n
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      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      STP\u4ef2\u88c1<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \u5f53STP\u9009\u4e3e\u9047\u5230\u5148\u51b3\u6761\u4ef6\u76f8\u540c\u6216\u79f0\u4e3a\u5e73\u5c40\u65f6\uff0c\u6700\u91cd\u51b3\u7b56\u57fa\u4e8e\u4ee5\u4e0b\u4e00\u7cfb\u5217\u6761\u4ef6\u3002<\/span><\/p>\n

      \u00a0\u00a0\u00a0 1\uff0e\u6700\u5c0f\u7684BID\u3002<\/span><\/p>\n

      \u00a0\u00a0\u00a0 2\uff0e\u6700\u4f4e\u7684\u6839\u8def\u5f84\u5f00\u9500\u3002<\/span><\/p>\n

      \u00a0\u00a0\u00a0 3\uff0e\u6700\u5c0f\u7684\u53d1\u9001\u65b9\u7684BID\u3002<\/span><\/p>\n

      \u00a0\u00a0\u00a0 4\uff0e\u6700\u5c0f\u7684\u7aef\u53e3ID\u3002<\/span><\/p>\n

      \n
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      <\/section>\n
      \n
      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      \u8def\u5f84\u5f00\u9500<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u4ea4\u6362\u673a\u7aef\u53e3\u5177\u6709\u5982\u4e0b\u8868\u4e2d\u5b9a\u4e49\u7684\u8def\u5f84\u5f00\u9500\u503c\u3002<\/span><\/p>\n

      \n

      <\/div><\/p>\n

      \n

      \u9ed8\u8ba4\u4e0b\uff0c\u5de5\u4f5c\u5728 RPVST+\u6a21\u5f0f\u4e0b\u7684Catalyst\u4ea4\u6362\u673a\u4f7f\u7528\u201c\u77ed\u6a21\u5f0f\u201d\uff0c\u537316\u6bd4\u7279\u7684\u8def\u5f84\u6216\u7aef\u53e3\u5f00\u9500\u503c\u3002\u5f53\u7f51\u7edc\u4e2d\u7684\u7aef\u53e3\u901f\u7387\u5c0f\u4e8e1Gbit\/s \u65f6\uff0c\u77ed\u6a21\u5f0f\u8303\u56f4\u7684\u5f00\u9500\u503c\u5df2\u7ecf\u8db3\u591f\u3002<\/span><\/p>\n

      \n

      \u4e0d\u8fc7\uff0c\u5982\u679c\u5b58\u572810Gbit\/s\u6216\u901f\u7387\u66f4\u9ad8\u7684\u7aef\u53e3\uff0c\u9700\u8981\u5c06\u7f51\u7edc\u4e2d\u6240\u6709\u4ea4\u6362\u673a\u8bbe\u7f6e\u6210\u4f7f\u7528\u201c\u957f\u6a21\u5f0f\u201d\uff0c\u537332\u6bd4\u7279\u7684\u8def\u5f84\u5f00\u9500\u8303\u56f4\uff0c\u8fd9\u6837\u505a\u53ef\u786e\u4fdd\u6240\u6709\u7684\u4ea4\u6362\u673a\u8ba1\u7b97\u6839\u8def\u5f84\u5f00\u9500\u503c\u7684\u4e00\u81f4\u6027\u3002<\/span><\/p>\n

      \n
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      \n
      <\/section>\n
      \n
      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      STP \u7aef\u53e3\u72b6\u6001<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      \u6bcf\u53f0\u4ea4\u6362\u673a\u7684\u7aef\u53e3\u987b\u7ecf\u5386\u4e00\u7cfb\u5217\u7684\u7aef\u53e3\u72b6\u6001\u6539\u53d8\u3002<\/span><\/p>\n

      \n

      01 \u7981\u7528\u72b6\u6001\uff08disabled\uff09<\/span><\/strong><\/p>\n

      \n

      \u7aef\u53e3\u88ab\u7ba1\u7406\u6027\u7684\u5173\u95ed\u6216\u7531\u4e8e\u6545\u969c\u5f15\u8d77\u7684\u7aef\u53e3\u5173\u95ed\uff08MST\u79f0\u6b64\u72b6\u6001\u4e3a\u4e22\u5f03\u72b6\u6001\uff08discarding\uff09\uff09\u3002<\/span><\/p>\n

      \n

      02 \u963b\u585e\u72b6\u6001\uff08blocking\uff09<\/span><\/strong><\/p>\n

      \n

      \u6b64\u7aef\u53e3\u72b6\u6001\u51fa\u73b0\u5728\u7aef\u53e3\u521d\u59cb\u5316\u4e4b\u540e\u3002\u5904\u4e8e\u963b\u585e\u72b6\u6001\u7684\u7aef\u53e3\u4e0d\u80fd\u63a5\u6536\u6216\u4f20\u8f93\u6570\u636e\uff0c\u4e0d\u80fd\u5411\u81ea\u5df1\u7684\u5730\u5740\u8868\u6dfb\u52a0MAC\u5730\u5740\uff0c\u53ea\u80fd\u63a5\u6536BPDUs\u3002\u5982\u679c\u68c0\u6d4b\u51fa\u5b58\u5728\u6865\u63a5\u73af\u8def\uff0c\u6216\u8005\u7aef\u53e3\u5931\u53bb\u5176\u6839\u7aef\u53e3\u6216\u6307\u5b9a\u7aef\u53e3\u7684\u72b6\u6001\uff0c\u90a3\u4e48\u5b83\u5c06\u8fd4\u56de\u5230\u963b\u585e\u72b6\u6001\uff08MST\u79f0\u6b64\u72b6\u6001\u4e3a\u4e22\u5f03\u72b6\u6001\uff09\u3002<\/span><\/p>\n

      \n

      03 \u4fa6\u542c\u72b6\u6001\uff08listening\uff09<\/span><\/strong><\/p>\n

      \n

      \u5982\u679c\u67d0\u7aef\u53e3\u53ef\u6210\u4e3a\u6839\u7aef\u53e3\u6216\u6307\u5b9a\u7aef\u53e3\uff0c\u8be5\u7aef\u53e3\u5c06\u8fdb\u5165\u4fa6\u542c\u72b6\u6001\u3002\u4fa6\u542c\u72b6\u6001\u7684\u7aef\u53e3\u4e0d\u80fd\u63a5\u6536\u6216\u4f20\u8f93\u6570\u636e\uff0c\u4e5f\u4e0d\u80fd\u5411\u81ea\u5df1\u7684\u5730\u5740\u8868\u4e2d\u6dfb\u52a0MAC\u5730\u5740\u53ef\u4ee5\u6536\u53d1BPDU\uff08MST\u79f0\u6b64\u72b6\u6001\u4e3a\u4e22\u5f03\u72b6\u6001\uff09\u3002<\/span><\/p>\n

      \n

      04 \u5b66\u4e60\u72b6\u6001\uff08learning\uff09<\/span><\/strong><\/p>\n

      \n

      \u5728\u8f6c\u53d1\u5ef6\u65f6\u8ba1\u65f6\u5668\u5230\u671f\u540e\uff08\u9ed8\u8ba4 15 \u79d2\uff09\uff0c\u7aef\u53e3\u5c06\u8fdb\u5165\u5b66\u4e60\u72b6\u6001\uff0e\u5b66\u4e60\u72b6\u6001\u7684\u7aef\u53e3\u4e0d\u80fd\u4f20\u8f93\u6570\u636e\u4f46\u53ef\u6536\u53d1BPDU\uff0c\u6b64\u72b6\u6001\u4e0b\u53ef\u5b66\u4e60MAC\u5730\u5740\u5e76\u53ef\u5c06\u5730\u5740\u52a0\u5165\u5230\u5730\u5740\u8868\u4e2d\u3002<\/span><\/p>\n

      \n

      05 \u8f6c\u53d1\u72b6\u6001\uff08forwarding\uff09<\/span><\/strong><\/p>\n

      \n

      \u5728\u7b2c2\u4e2a\u8f6c\u53d1\u5ef6\u65f6\u8ba1\u65f6\u5668\u5230\u671f\u540e\uff08\u9ed8\u8ba415\u79d2\uff09\uff0c\u7aef\u53e3\u5c06\u8fdb\u5165\u8f6c\u53d1\u72b6\u6001\u3002\u6b64\u72b6\u6001\u4e0b\u7684\u7aef\u53e3\u53ef\u4ee5\u6536\u53d1\u6570\u636e\u3001\u5b66\u4e60MAC\u5730\u5740\u53ca\u6536\u53d1BPDUs\u3002<\/span><\/p>\n

      \n

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      <\/section>\n
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      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      STP \u62d3\u6251\u53d8\u5316<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      \u5982\u679c\u4ea4\u6362\u673a\u7684\u67d0\u4e2a\u7aef\u53e3\u8fdb\u5165\u4e86\u8f6c\u53d1\u72b6\u6001\uff08\u542f\u52a8\u4e86 PortFast \u6280\u672f\u9664\u5916\uff09\uff0c\u5c06\u4ea7\u751f\u62d3\u6251\u53d8\u66f4\u4fe1\u53f7\u3002<\/span><\/p>\n

      \u5982\u679c\u4ea4\u6362\u673a\u7684\u67d0\u4e2a\u7aef\u53e3\u4ece\u8f6c\u53d1\u6216\u5b66\u4e60\u72b6\u6001\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff0c\u5c06\u4ea7\u751f\u62d3\u6251\u53d8\u66f4\u4fe1\u53f7\u3002<\/span><\/p>\n

      \u4e3a\u4e86\u53d1\u9001\u62d3\u6251\u53d8\u66f4\u4fe1\u53f7\uff0c\u4ea4\u6362\u673a\u4f1a\u5728\u6bcf\u4e2aHello\u65f6\u95f4\u95f4\u9694\u4ece\u6839\u7aef\u53e3\u5411\u5916\u53d1\u9001TCN BPDU\u3002\u76f4\u5230\u4e0a\u884c\u7684\u6307\u5b9a\u6865\u90bb\u5c45\u786e\u8ba4\u4e86 TCN BPDU\u3002\u90bb\u5c45\u4f1a\u5728\u81ea\u8eab\u7684\u6839\u7aef\u53e3\u4e0a\u7ee7\u7eed\u4e2d\u7ee7TCN BPDU\u76f4\u5230\u6839\u6865\u6536\u5230\u4e3a\u6b62\u3002<\/span><\/p>\n

      \u6839\u6865\u901a\u8fc7\u53d1\u9001\u914d\u7f6eBPDU\u6765\u5c06\u62d3\u6251\u53d8\u66f4\u901a\u77e5\u7ed9\u6574\u68f5\u751f\u6210\u6811\uff0c\u8fd9\u79cdBPDU\u8bbe\u7f6e\u4e86\u62d3\u6251\u53d8\u66f4\u4f4d\uff08TC\uff09\u3002\u6b64\u64cd\u4f5c\u5c06\u5bfc\u81f4\u6240\u6709\u7684\u4e0b\u884c\u4ea4\u6362\u673a\u5c06\u5176\u5730\u5740\u8868\u8001\u5316\u65f6\u95f4\uff08\u9ed8\u8ba4300\u79d2\uff09\u51cf\u5c11\u5230\u8f6c\u53d1\u5ef6\u65f6\uff08\u9ed8\u8ba415\u79d2\uff09\uff0c\u4f7f\u5f97\u4ea4\u6362\u673a\u5c06\u4e0d\u6d3b\u52a8\u7684MAC\u5730\u5740\u66f4\u5feb\u7684\u5237\u65b0\u51fa\u5730\u5740\u8868<\/span><\/p>\n

      \n
      \n
      \n
      \n
      <\/section>\n
      \n
      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      \u589e\u5f3a STP \u7684\u7a33\u5b9a\u6027<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      STP\u6839\u4fdd\u62a4\uff08Root Guard\uff09\u7279\u6027\u7528\u6765\u5728\u4ea4\u6362\u7f51\u7edc\u5185\u5f3a\u5236\u6839\u6865\u4f4d\u7f6e\u53ca\u8eab\u4efd\u3002<\/span>\u5728\u7aef\u53e3\u542f\u7528\u4e86Root Guard\u7279\u6027\u540e\uff0c\u5982\u679c\u8be5\u7aef\u53e3\u6536\u5230\u4e86\u66f4\u4f18\u7684BPDU\uff0c\u90a3\u4e48Root Guard\u5c06\u505c\u7528\u6b64\u7aef\u53e3\u3002\u6b64\u6280\u672f\u7528\u4e8e\u907f\u514d\u5176\u4ed6\u4ea4\u6362\u673a\u610f\u5916\u5730\u6210\u4e3a\u6839\u6865\u3002<\/span><\/p>\n

      \n

      \u5e94\u8be5\u5728\u6240\u6709\u4e0d\u5e94\u51fa\u73b0\u6839\u6865\u7684\u7aef\u53e3\u4e0a\u542f\u7528STP Root Guard \u7279\u6027\uff0c\u8fd9\u6837\u505a\u4fdd\u62a4\u4e86\u5f53\u524d\u4e3b\u6839\u6865\u548c\u5907\u6839\u6865\u7684\u9009\u62e9\u3002<\/span><\/p>\n

      \n

      \u5355\u5411\u94fe\u8def\u68c0\u6d4b\uff08UDLD\uff09\u63d0\u4f9b\u4e86\u4e00\u79cd\u68c0\u6d4b\u5355\u5411\u4f20\u8f93\u94fe\u8def\u7684\u65b9\u6cd5\uff0c\u4f7f\u5f97STP\u65e0\u6cd5\u5e38\u89c4\u68c0\u6d4b\u51fa\u6765\u6216\u963b\u6b62\u7684\u8def\u7531\u73af\u8def\u548c\u6d41\u91cf\u9ed1\u6d1e\u5f97\u4ee5\u9632\u6b62\u3002<\/span><\/p>\n

      \n

      \u5de5\u4f5c\u57282\u5c42\u7684UDLD\u53d1\u9001\u542b\u6709\u8bbe\u5907ID\u4e0e\u7aef\u53e3ID\u7684\u6570\u636e\u5305\u81f3\u4ea4\u6362\u673a\u7aef\u53e3\u6240\u8fde\u7684\u90bb\u5c45\u8bbe\u5907\u3002\u540c\u65f6\uff0c\u90bb\u5c45\u5c06\u4efb\u4f55\u6536\u5230\u7684UDLD \u6570\u636e\u5305\u539f\u8def\u53d1\u56de\uff0c\u4ee5\u4fbf\u8ba9\u5b83\u7684\u90bb\u5c45\u77e5\u9053\u8be5\u6570\u636e\u5305\u5df2\u7ecf\u88ab\u5bf9\u7aef\u90bb\u5c45\u8bc6\u522b\u3002UDLD\u6d88\u606f\u4ee5\u6d88\u606f\u95f4\u9694\uff08message interval\uff09\u65f6\u95f4\u53d1\u51fa\uff0c\u901a\u5e38\u9ed8\u8ba4\u503c\u4e3a15\u79d2\u3002<\/span><\/p>\n

      \n

      UDLD\u53ef\u5de5\u4f5c\u5728\u4e24\u79cd\u6a21\u5f0f\u4e0b\uff1a<\/span><\/strong><\/p>\n

      \n

      \u666e\u901a\u6a21\u5f0f\uff08normal mode\uff09<\/span><\/strong><\/p>\n

      \u5355\u5411\u94fe\u8def\u4f5c\u4e3a\u4e00\u79cd\u9519\u8bef\u88ab\u68c0\u6d4b\u5e76\u62a5\u544a\u51fa\u6765\uff0c\u4f46\u4e0d\u505a\u5176\u4ed6\u52a8\u4f5c\u3002<\/span><\/p>\n

      \n

      \u4e3b\u52a8\u6a21\u5f0f\u00a0\uff08aggressive mode\uff09<\/span><\/strong><\/p>\n

      \u5355\u5411\u94fe\u8def\u4f5c\u4e3a\u4e00\u79cd\u9519\u8bef\u88ab\u68c0\u6d4b\u5e76\u62a5\u544a\u51fa\u6765\uff0c\u57288\u6b21\u5c1d\u8bd5\uff081\u79d2\u4e00\u6b21\uff0c\u51718\u79d2\uff09\u91cd\u65b0\u5efa\u7acb\u94fe\u8def\u540e\u505c\u7528\u7aef\u53e3\u3002\u505c\u7528\u7684\u7aef\u53e3\u987b\u624b\u5de5\u91cd\u65b0\u542f\u7528\u3002<\/span><\/p>\n

      \n

      STP\u73af\u8def\u9632\u62a4\uff08Loop Guard\uff09\u6280\u672f\u7528\u6765\u5728\u6839\u7aef\u53e3\uff08root port\uff09\u548c\u66ff\u6362\u6839\u7aef\uff08alternate root port\uff09\u4e0a\u68c0\u6d4bBPDU\u7684\u7f3a\u5931\u3002\u5982\u679c\u6536\u4e0d\u5230BPDU\uff0c\u975e\u6307\u5b9a\u7aef\u53e3\u5c06\u88ab\u4e34\u65f6\u505c\u7528\uff0c\u7528\u6765\u9632\u6b62\u975e\u6307\u5b9a\u7aef\u53e3\u9519\u8bef\u7684\u6210\u4e3a\u6307\u5b9a\u7aef\u53e3\u5e76\u8fdb\u5165\u8f6c\u53d1\u72b6\u6001\u3002<\/span><\/p>\n

      \n

      \u5bf9\u4e8e\u6240\u6709\u53ef\u80fd\u6d3b\u52a8STP\u62d3\u6251\u6765\u8bf4\uff0c\u5e94\u8be5\u5728\u6240\u6709\u6839\u7aef\u53e3\u548c\u66ff\u6362\u6839\u7aef\u53e3\uff08\u4e24\u8005\u90fd\u662f\u975e\u6307\u5b9a\u7aef\u53e3\uff09\u4e0a\u542f\u7528STP Loop Guard\u3002<\/span><\/p>\n

      \n

      \n
      \n
      \n
      \n
      <\/section>\n
      \n
      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      STP \u8fd0\u4f5c\u5b9e\u4f8b<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      \u6765\u770b\u4e00\u4e2aSTP\u8fd0\u4f5c\u7684\u4f8b\u5b50\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u4e3a3\u53f0Catalyst\u4ea4\u6362\u673a\u4e92\u8fde\u6210\u7684\u4e09\u89d2\u5f62\u62d3\u6251\u7f51\u7edc\u3002RP\u4ee3\u8868\u6839\u7aef\u53e3\uff0cDP\u4ee3\u8868\u6307\u5b9a\u7aef\u53e3\uff0cF\u4ee3\u8868\u5904\u4e8e\u8f6c\u53d1\u72b6\u6001\u7684\u7aef\u53e3\uff0cX\u4ee3\u8868\u5904\u4e8e\u963b\u585e\u72b6\u6001\u7684\u7aef\u53e3\u3002<\/span><\/p>\n

      \n

      <\/div><\/p>\n

      \n

      \u751f\u6210\u6811\u7b97\u6cd5\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/span><\/strong><\/p>\n

      \n

      01 \u9009\u4e3e\u6839\u6865<\/span><\/strong><\/p>\n

      \n

      \u6240\u67093\u53f0\u4ea4\u6362\u673a\u90fd\u5177\u6709\u76f8\u540c\u7684\u6865\u4f18\u5148\u7ea7\uff08\u90fd\u4e3a\u9ed8\u8ba4\u503c32768\uff09\u3002\u4f46Catalyst A\u5177\u6709\u6700\u5c0f\u7684MAC\u5730\u5740\uff0800-00-00-00-00-0a\uff09\uff0c\u6545Catalyst A\u9009\u4e3e\u6210\u4e3a\u6839\u6865\u3002<\/span><\/p>\n

      \n

      02 \u9009\u4e3e\u6839\u7aef\u53e3<\/span><\/strong><\/p>\n

      \n

      \u5728\u6bcf\u53f0\u975e\u6839\u6865\u4ea4\u6362\u673a\u4e0a\u8ba1\u7b97\u51fa\u6700\u4f4e\u7684\u6839\u8def\u5f84\u5f00\u9500\u3002\u5728Catalyst B\u4e0a\u4e3a\u7aef\u53e31\/1\uff0c\u5176\u7aef\u53e3\u8def\u5f84\u5f00\u9500\u4e3a 0+19\uff0c Catalyst C\u4e0a\u4e3a\u7aef\u53e31\/1\uff0c\u5176\u6839\u8def\u5f84\u5f00\u9500\u540c\u6837\u662f 0+19\u3002<\/span><\/p>\n

      \n

      03 \u9009\u4e3e\u6307\u5b9a\u7aef\u53e3<\/span><\/strong><\/p>\n

      \n

      \u6839\u636e\u89c4\u5b9a\uff0c\u6839\u6865\u4e0a\u7684\u6240\u6709\u7aef\u53e3\u90fd\u5c06\u6210\u4e3a\u5404\u81ea\u7f51\u6bb5\u7684\u6307\u5b9a\u7aef\u53e3\u3002\u56e0\u6b64\uff0cCatalyst A\u4e0a\u7684\u7aef\u53e31\/1\u4e0e1\/2\u90fd\u4e3a\u6307\u5b9a\u7aef\u53e3\u3002Catalyst B\u7aef\u53e31\/2\u4e0eCatalyst C \u7aef\u53e31\/2 \u5171\u4eab\u4e00\u4e2a\u7f51\u6bb5\uff0c\u987b\u5728\u4e24\u7aef\u53e3\u4e4b\u95f4\u9009\u4e3e\u51fa\u4e00\u4e2a\u6307\u5b9a\u7aef\u53e3\u3002\u8fd9\u4e24\u4e2a\u7aef\u53e3\u7684\u6839\u8def\u5f84\u5f00\u9500\u90fd\u4e3a0+19+19\uff0c\u537338\uff0c\u51fa\u73b0\u4e86\u5e73\u5c40\u3002\u518d\u9009\u51fa\u6700\u4f4e\u7684\u53d1\u9001\u65b9\u7684BID\uff0c\u6545Catalyst B\uff08MAC \u5730\u5740\u6700\u5c0f\uff09\u7684\u7aef\u53e31\/2 \u9009\u4e3e\u6210\u4e3a\u6307\u5b9a\u7aef\u53e3\u3002<\/span><\/p>\n

      \n

      04 \u65e2\u4e0d\u662f\u6839\u7aef\u53e3\u53c8\u4e0d\u662f\u6307\u5b9a\u7aef\u53e3\u7684\u6240\u6709\u7aef\u53e3\u5c06\u5904\u4e8e\u963b\u585e\u72b6\u6001<\/span><\/strong><\/p>\n

      \n

      \u552f\u4e00\u5269\u4e0b\u7684Catalyst C\u4e0a\u7aef\u53e31\/2\uff0c\u65e2\u4e0d\u662f\u6839\u7aef\u53e3\uff0c\u53c8\u4e0d\u662f\u6307\u5b9a\u7aef\u53e3\u3002\u8be5\u7aef\u53e3\u5c06\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff08\u56fe\u4e2dX\u6240\u793a \uff09\u3002<\/span><\/p>\n

      \n

      \n
      \n
      \n
      \n
      <\/section>\n
      \n
      <\/div><\/section>\n
      <\/section>\n<\/section>\n
      <\/section>\n<\/section>\n
      \n
      \u914d\u7f6eSTP<\/strong><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

      \n

      01\uff08\u53ef\u9009\uff09\u542f\u7528\u6216\u7981\u7528 STP<\/span><\/strong><\/p>\n

      \n

      (global) [no] spanning-tree [vlan vlan]<\/span><\/p>\n

      \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c STP \u542f\u7528\u5728 VLAN 1 \u548c\u4efb\u4f55\u65b0\u521b\u5efa\u7684 VLAN \u4e2d\u3002\u5982\u679c\u672a\u6307\u5b9a\u5177\u4f53\u7684 VLAN\uff0c\u5c06\u5728\u6240\u6709 VLAN \u4e0a\u542f\u7528\u6216\u7981\u7528 STP\u3002\u8981\u77e5\u9053\u5982\u679c\u7981\u7528\u4e86 STP\uff0c\u5c06\u4e0d\u80fd\u68c0\u6d4b\u5e76\u9632\u6b62\u6865\u63a5\u73af\u8def\u7684\u5f62\u6210\u3002\u4ea4\u6362\u673a\u5e94\u59cb\u7ec8\u542f\u7528 STP\u3002<\/span><\/p>\n

      \n

      02\uff08\u53ef\u9009\uff09\u8bbe\u7f6e\u4ea4\u6362\u673a\u7684 STP \u6a21\u5f0f<\/span><\/strong><\/p>\n

      \n

      spanning-tree mode (pvst I mst I rapid- pvst]<\/span><\/p>\n

      \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6240\u6709 Catalyst \u4ea4\u6362\u673a\u4e3a\u6bcf\u4e2a VLAN \u7684 STP \u5b9e\u4f8b\u8fd0\u884c PVST+\u6a21\u5f0f\u7684 STP\u3002\u60f3\u8981\u914d\u7f6e\u6210\u5176\u4ed6\u7684STP\u6a21\u5f0f\uff0c\u987b\u660e\u786e\u4f7f\u7528\u9009\u9879rapid-pvst\uff08\u5e26\u6709IEEE\u517c\u5bb9\u6027\u7684\u6bcf vlan 802.1w\uff09\u6216mst\u3002<\/span><\/p>\n

      \n

      03\uff08\u4ec5\u9002\u7528\u4e8e MST\uff09\u6fc0\u6d3b\u4e00\u4e2a MST \u5b9e\u4f8b<\/span><\/strong><\/p>\n

      \n

      \uff081\uff09\u8fdb\u5165 MST \u914d\u7f6e\u6a21\u5f0f<\/span><\/strong><\/p>\n

      spanning-tree\u00a0mst configuration<\/span><\/p>\n

      \n

      \uff082\uff09\u5b9a\u4e49 MST \u533a\u57df<\/span><\/strong><\/p>\n

      \uff08mst )name\u00a0name<\/span><\/p>\n

      \uff08mst )revision\u00a0revision-number<\/span><\/p>\n

      \u4f7f\u7528name\uff08\u6700\u591a32\u5b57\u7b26\u7684\u6587\u672c\u5b57\u7b26\u4e32\uff09\u6765\u5b9a\u4e49MST\u533a\u57df\u3002\u5982\u679c\u672a\u6307\u5b9a\u533a\u57df\u540d\uff0c\u7cfb\u7edf\u5c06\u4e0d\u4f7f\u7528\u533a\u57df\u540d\u3002\u7528\u6237\u53ef\u4ee5\u4f7f\u7528\u533a\u57df\u4fee\u8ba2\u53f7\u6765\u6307\u51fa\u533a\u57df\u914d\u7f6e\u6539\u53d8\u7684\u6b21\u6570\u3002<\/span><\/p>\n

      \u4fee\u8ba2\u53f7revision-number\uff080\uff5e65535\uff0c\u9ed8\u8ba4\u4e3a 1\uff09\u987b\u660e\u786e\u5730\u8bbe\u5b9a\uff0c\u5e76\u4e14\u4e0d\u4f1a\u968f\u533a\u57df\u914d\u7f6e\u53d8\u5316\u81ea\u52a8\u9012\u589e\u3002<\/span><\/p>\n

      \n

      \uff083\uff09\u5c06\u4e00\u4e2a\u6216\u591a\u4e2aVLAN\u6620\u5c04\u5230\u5b9e\u4f8b\u4e2d<\/span><\/strong><\/p>\n

      instance instance-id vlan\u00a0vlan-range<\/span><\/p>\n

      \u6b64\u547d\u4ee4\u7528\u4e8e\u5c06vlan\u53f7\uff08 1\uff5e1005\u30011025\uff5e4094\uff09\u6620\u5c04\u5230 MST instance\uff080\uff5e15\uff09\u4e2d\u3002\u6620\u5c04\u5173\u7cfb\u5c06\u4fdd\u5b58\u5728MST\u533a\u57df\u7f13\u5b58\u4e2d\u3002<\/span><\/p>\n

      \n

      \uff084\uff09\u9000\u51fa MST \u914d\u7f6e\u6a21\u5f0f<\/span><\/strong><\/span><\/p>\n

      \uff08mst\uff09end<\/span><\/p>\n

      \u8f93\u5165end\u547d\u4ee4\u5c06\u9000\u51fa\u5e76\u8fd4\u56de\u5230\u7279\u6743\u6a21\u5f0f\u3002\u540c\u65f6\u914d\u7f6e\u7684\u6539\u53d8\u7acb\u5373\u751f\u6548\u3002\u4f46\u5982\u679c\u60f3\u6c38\u4e45\u4fdd\u5b58MST\u914d\u7f6e\uff0c\u987b\u5c06\u914d\u7f6e\u4fdd\u5b58\u81f3NVRAM\u4e2d\u3002<\/span><\/p>\n

      \n

      04\uff08\u53ef\u9009\uff09\u653e\u7f6e\u6839\u6865\u4ea4\u6362\u673a<\/span><\/strong><\/p>\n

      \n

      \uff08global\uff09spanning-tree vlan\u00a0vlan\u00a0root {primary | secondary} [diameter\u00a0net-diameter ][hello-time\u00a0hello-time]<\/span><\/p>\n

      \u6216\u00a0<\/span><\/p>\n

      \uff08global\uff09 spanning-tree mst\u00a0instance-id\u00a0root {primary | secondary} [diameter\u00a0net-diameter ][hello-time\u00a0hello-time]<\/span><\/p>\n

      \n

      \u5e26\u6709\u53c2\u6570 primary \u7684\u547d\u4ee4\u5c06\u4f7f\u4ea4\u6362\u673a\u6210\u4e3a\u82e5\u5e72 VLAN\uff081\uff5e1005\u548c1025\uff5e4094\uff09\u6216\u6307\u5b9a\u7684STP \u5b9e\u4f8b\uff081\uff5e16\uff0c\u5982\u672a\u6307\u5b9a\u5373VLAN 1\uff09\u7684\u4e3b\u6839\u6865\u3002\u7f51\u6865\u4f18\u5148\u7ea7\u7684\u4fee\u6539\u89c4\u5219\u5982\u4e0b\uff1a\u5982\u679c\u5927\u4e8e8192\uff0c\u5c06\u88ab\u8bbe\u7f6e\u62108092\uff1b<\/span><\/p>\n

      \n

      \u5982\u679c\u5c0f\u4e8e8192\uff0c\u5c06\u88ab\u8bbe\u7f6e\u6210\u6bd4\u5f53\u524d\u6839\u6865\u4f18\u5148\u7ea7\u66f4\u5c0f\u7684\u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u5173\u952e\u5b57 secondary\u6765\u6307\u5b9a\u5907\u6839\u6865\u6216\u6b21\u6839\u6865\uff0c\u4ee5\u9632\u4e3b\u6839\u6865\u5931\u6548\u3002\u8fd9\u91cc\uff0c\u7f51\u6865\u4f18\u5148\u7ea7\u5c06\u88ab\u8bbe\u7f6e\u621016384\uff08\u5bf9\u4e8eMST\u6765\u8bf4\uff0c\u6839\u6865\u4f18\u5148\u7ea7\u88ab\u8bbe\u7f6e\u621024576\uff0c\u5907\u6839\u6865\u88ab\u8bbe\u7f6e\u6210 28672\uff09\u3002<\/span><\/p>\n

      \n

      \u5173\u952e\u5b57diameter\u6307\u5b9a\u4e86\u7f51\u7edc\u4e2d\u4e24\u7aef\u70b9\u4e4b\u95f4\u7684\u76f4\u5f84\uff0c\u5373\u7f51\u6865\u6216\u4ea4\u6362\u673a\u7684\u6570\u91cf\uff081\uff5e7\uff0c\u9ed8\u8ba4\u4e3a7\uff09\u3002\u53ef\u540c\u65f6\u8bbe\u5b9aHello\u65f6\u95f4\u95f4\u9694\uff08\u9ed8\u8ba42\u79d2\u949f\uff09\u3002<\/span><\/p>\n

      \n

      \u7f51\u7edc\u76f4\u5f84\u7684\u8bbe\u7f6e\u5c06\u5bfc\u81f4\u7cfb\u7edf\u81ea\u52a8\u8ba1\u7b97\u5e76\u4fee\u6539\u5176\u4ed6STP\u8ba1\u65f6\u5668\u503c\u3002\u53ef\u4f7f\u7528\u5176\u4ed6\u547d\u4ee4\u660e\u786e\u5730\u8c03\u6574\u8ba1\u65f6\u5668\u503c\uff0c\u4e0d\u8fc7\u8c03\u6574\u76f4\u5f84\u9690\u85cf\u4e86\u8ba1\u65f6\u5668\u8ba1\u7b97\u7684\u590d\u6742\u6027\u3002<\/span><\/p>\n

      \n

      05\uff08\u53ef\u9009\uff09\u8c03\u6574\u7f51\u6865\u7684\u4f18\u5148\u7ea7<\/span><\/strong><\/p>\n

      \n

      \uff08global\uff09spanning-tree vlan\u00a0vlan\u00a0priority\u00a0priority [diameter\u00a0net-diameter ][hello-time\u00a0hello-time]<\/span><\/p>\n

      \u6216
      \uff08global\uff09spanning-tree mst\u00a0instance-id\u00a0priority\u00a0priority [diameter\u00a0net-diameter ][hello-time\u00a0hello-time]<\/span><\/p>\n

      \n

      \u7528\u6237\u53ef\u4ee5\u76f4\u63a5\u5c06\u7f51\u6865\u4f18\u5148\u7ea7\u4fee\u6539\u6210\u5176\u4ed6\u6570\u503c\uff0c\u800c\u4e0d\u662f\u81ea\u52a8\u83b7\u5f97\u7684\u4e3b\u5907\u6839\u6865\u7684\u4f18\u5148\u7ea7\u3002\u4f18\u5148\u7ea7\u53ef\u57fa\u4e8e\u6bcfVLAN\u6216STP\u5b9e\u4f8b\u6765\u8bbe\u5b9a\u3002\u9009\u9879instance-list\u6307\u5b9a\u4e86\u5b9e\u4f8b\u53f7\uff0c\u53ef\u4f7f\u7528\u9017\u53f7\u6216\u8fde\u5b57\u7b26\u6765\u5b9a\u4e49\u4e00\u4e2a\u6216\u4e00\u7ec4\u5b9e\u4f8b\u3002<\/span><\/p>\n

      \n

      \u5982\u679c\u60f3\u5f3a\u5236\u67d0\u53f0\u4ea4\u6362\u673a\u6210\u4e3a\u6839\u6865\uff0c\u5e94\u4e3a\u6b64\u4ea4\u6362\u673a\u914d\u7f6e\u4e00\u4e2a\u6bd4\u5728VLAN\u6216STP\u5b9e\u4f8b\u4e2d\u5176\u4ed6\u6240\u6709\u4ea4\u6362\u673a\u90fd\u8981\u4f4e\u7684\u4f18\u5148\u7ea7\u3002\u5bf9\u4e8ePVST+\u6765\u8bf4\u7f51\u6865\u4f18\u5148\u7ea7\u8303\u56f4\u4ecb\u4e8e 0\uff5e65535\uff08\u9ed8\u8ba4\u4e3a 32768\uff09\uff0c\u4e0d\u8fc7\uff0c\u5f53\u542f\u7528\u6269\u5c55 VLAN \u652f\u6301\u529f\u80fd\u540e\uff0c\u4f18\u5148\u7ea7\u53ea\u80fd\u8bbe\u5b9a\u6210\u4ee5\u4e0b\u56fa\u5b9a\u6570\u503c\uff1a0\uff08\u4f18\u5148\u7ea7\u6700\u9ad8\uff09\u30014096\u30018192\u300112288\u300116384\u300120480\u300124576\u300128672\u300132768\u300136864\u300140960\u300145056\u300149152\u300153248\u3001 57344\u548c61440\uff08\u4f18\u5148\u7ea7\u6700\u4f4e\uff09\u3002<\/span><\/p>\n

      \n

      06\uff08\u53ef\u9009\uff09\u963b\u6b62\u7aef\u53e3\u6210\u4e3aSTP\u6839\u7aef\u53e3<\/span><\/strong><\/p>\n

      \n

      \u00a0(interface) spanning -tree rootguard<\/span><\/p>\n

      \u6b64\u547d\u4ee4\u5c06\u5728\u7aef\u53e3\u6216\u63a5\u53e3\u4e0a\u542f\u7528 STP Root Guard\uff08\u6839\u4fdd\u62a4\uff09\u7279\u6027\u3002\u5982\u679c\u8fde\u63a5\u5230\u6b64\u7aef\u53e3\u7684\u7f51\u6865\u901a\u544a\u4e00\u4e2a\u66f4\u4f4e\u7684\u6865ID\u5e76\u6210\u4e3a\u4e86\u6839\u6865\uff0c\u6b64\u7aef\u53e3\u5c06\u8fdb\u5165root-inconsistent\uff08\u4fa6\u542c\uff09STP\u72b6\u6001\u3002\u5f53\u6b64\u7aef\u53e3\u4e0d\u518d\u80fd\u68c0\u6d4b\u5230\u6839\u6865\u7684BPDU\u65f6\uff0c\u5c06\u9000\u56de\u5230\u6b63\u5e38\u7684\u5de5\u4f5c\u72b6\u6001\u3002<\/span><\/p>\n

      \n

      07\uff08\u53ef\u9009\uff09\u8c03\u8282\u6839\u8def\u5f84\u5f00\u9500<\/span><\/strong><\/p>\n

      \n

      \uff081\uff09\uff08\u53ef\u9009\uff09\u8bbe\u7f6e\u7aef\u53e3\u5f00\u9500\u53d6\u503c\u8303\u56f4<\/span><\/strong><\/p>\n

      (global)\u00a0spanning-tree pathcost defaultcost-method\u00a0[long I short]<\/span><\/p>\n

      \u9ed8\u8ba4\u4e0b\uff0c PVST+\u7684\u4ea4\u6362\u673a\u4f7f\u7528 short \u6a21\u5f0f\uff0816 \u6bd4\u7279\uff09\u7aef\u53e3\u5f00\u9500\u503c\u3002\u5982\u679c\u670910Gbit\/s\u6216\u4ee5\u4e0a\u7684\u7aef\u53e3\uff0c\u5e94\u5728\u7f51\u7edc\u4e2d\u7684\u6240\u6709\u4ea4\u6362\u673a\u4e0a\u5c06\u7aef\u53e3\u5f00\u9500\u53d6\u503c\u8303\u56f4\u8bbe\u5b9a\u4e3a long \u6a21\u5f0f\uff0832 \u6bd4\u7279\uff09\u3002MISTP\u3001 MISTP-PVST+\u53ca MST \u9ed8\u8ba4\u4f7f\u7528\u201c\u957f\u6a21\u5f0f\u201d\u7684\u7aef\u53e3\u5f00\u9500\u3002<\/span><\/p>\n

      \n

      \uff082\uff09\u8bbe\u5b9a\u6240\u6709VLAN\u6216\u5b9e\u4f8b\u7684\u7aef\u53e3\u5f00\u9500<\/span><\/strong><\/p>\n

      <\/div><\/p>\n

      \u6b64\u547d\u4ee4\u53ef\u5c06\u6240\u6709VLAN\u6216STP\u5b9e\u4f8b\u7684\u7aef\u53e3\u5f00\u9500\u8bbe\u5b9a\u6210cost \uff08\u77ed\u6a21\u5f0f\u6216 MISTP\u6a21\u5f0f\u4e0b\u4e3a 1\uff5e65535\uff0c\u5728\u957f\u6a21\u5f0f\u4e0b\u4e3a 1\uff5e200000000\uff09\u3002<\/span><\/p>\n

      \n

      \uff083\uff09\u8bbe\u5b9a\u6bcf VLAN \u6216\u6bcf\u4e2a\u5b9e\u4f8b\u7684\u7aef\u53e3\u5f00\u9500<\/span><\/strong><\/p>\n

      \uff08interface\uff09\u00a0spanning-tree vlan\u00a0vlan-id\u00a0cost\u00a0cost<\/span><\/p>\n

      \u6216<\/span><\/p>\n

      \uff08interface\uff09 spanning-tree mst instance-id cost cost<\/span><\/p>\n

      \u6b64\u547d\u4ee4\u53ef\u5c06 VLAN vlan-id \u6216 STP \u5b9e\u4f8b instance-id\uff080\uff5e15\uff09\u7684\u7aef\u53e3\u5f00\u9500\u8bbe\u5b9a\u4e3a cost\uff08\u77ed\u6a21\u5f0f\u4e3a 1\uff5e65535\uff0c\u957f\u6a21\u5f0f\u4e3a 1\uff5e200000000\uff09\u3002<\/span><\/p>\n

      \n

      08\uff08\u53ef\u9009\uff09\u8c03\u8282\u7aef\u53e3\u4f18\u5148\u7ea7<\/span><\/strong><\/p>\n

      \n

      \uff081\uff09\u8bbe\u5b9a\u6240\u6709 VLAN \u6216\u5b9e\u4f8b\u7684\u7aef\u53e3\u4f18\u5148\u7ea7<\/span><\/strong><\/p>\n

      <\/div><\/p>\n

      \u6b64\u547d\u4ee4\u5c06\u7aef\u53e3\u4f18\u5148\u7ea7\u8bbe\u5b9a\u6210priority(2\uff5e255)\u3002<\/span><\/p>\n

      \n

      \uff082\uff09\u8bbe\u5b9a\u6bcf VLAN \u6216\u6bcf\u4e2a\u5b9e\u4f8b\u7684\u7aef\u53e3\u4f18\u5148\u7ea7<\/span><\/strong><\/p>\n

      \uff08interface\uff09 spanning-tree vlan vlan-list port-priority priority<\/span><\/p>\n

      \u6216<\/span><\/p>\n

      \uff08interface\uff09spanning-tree mst instance-id port-priority priority<\/span><\/p>\n

      \u6b64\u547d\u4ee4\u5c06VLAN vlan-id\u6216STP\u5b9e\u4f8binstance-id\uff080\uff5e15\uff09\u7684\u7aef\u53e3\u4f18\u5148\u7ea7\u8bbe\u5b9a\u4e3a<\/span><\/p>\n

      \n

      09\uff08\u53ef\u9009\uff09\u4f7f\u7528 UDLD \u68c0\u6d4b\u5355\u5411\u8fde\u63a5<\/span><\/strong><\/p>\n

      \n

      \uff081\uff09\u5728\u4ea4\u6362\u673a\u4e0a\u542f\u7528 UDLD<\/span><\/strong><\/p>\n

      <\/div><\/p>\n

      \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c UDLD \u5904\u4e8e\u505c\u7528\u72b6\u6001\u3002\u5728\u5c06 UDLD \u5e94\u7528\u5728\u7279\u5b9a\u7aef\u53e3\u4e4b\u524d\u987b\u5148\u5c06\u5176\u542f\u7528\u3002Supervisor IOS \u4e2d\u53ef\u4f7f\u7528\u5173\u952e\u5b57 aggressive \u6765\u5728\u6240\u6709\u4ee5\u592a\u7f51\u5149\u7ea4\u7aef\u53e3\u4e0a\u5168\u5c40\u5730\u542f\u7528UDLD\u4e3b\u52a8\u6a21\u5f0f\u3002<\/span><\/p>\n

      \n

      \uff082\uff09\uff08\u53ef\u9009\uff09\u8c03\u6574UDLD\u6d88\u606f\u95f4\u9694\u8ba1\u65f6\u5668<\/span><\/strong><\/p>\n

      <\/div><\/p>\n

      \u6b64\u547d\u4ee4\u5c06 UDLD \u6d88\u606f\u65f6\u95f4\u95f4\u9694\u8bbe\u5b9a\u6210interval\uff087\uff5e90 \u79d2\uff0c\u9ed8\u8ba4 60 \u79d2\uff09\u3002<\/span><\/p>\n

      \n

      \uff083\uff09\u5728\u7279\u5b9a\u7aef\u53e3\u4e0a\u542f\u7528UDLD<\/span><\/strong><\/p>\n

      ( interface)\u00a0udld [enable I disable ]<\/span><\/p>\n

      \u5728\u4ea4\u6362\u673a\u4e0a\u5168\u5c40\u542f\u7528 UDLD \u540e\uff0c UDLD \u5c06\u9ed8\u8ba4\u542f\u7528\u5728\u6240\u6709\u4ee5\u592a\u7f51\u5149\u7ea4\u7aef\u53e3\u4e0a\u3002\u9ed8\u8ba4\u4e0b\uff0c\u5728\u6240\u6709\u7684\u4ee5\u592a\u7f51\u53cc\u7ede\u7ebf\u4ecb\u8d28\u7aef\u53e3\u4e0a\uff0c UDLD\u5904\u4e8e\u505c\u7528\u72b6\u6001\u3002<\/span><\/p>\n

      \n

      \uff084\uff09\uff08\u53ef\u9009\uff09\u5728\u7279\u5b9a\u7aef\u53e3\u4e0a\u542f\u7528UDLD\u4e3b\u52a8\u6a21\u5f0f<\/span><\/strong><\/p>\n

      ( interface)\u00a0udld aggressive<\/span><\/p>\n

      \u5728\u7aef\u53e3\u4e0a\u542f\u7528 UDLD \u4e3b\u52a8\u6a21\u5f0f\u4e4b\u540e\uff0c\u5f53\u7cfb\u7edf\u68c0\u6d4b\u5230\u5355\u5411\u8fde\u63a5\u65f6\u5c06\u505c\u7528\u6b64\u7aef\u53e3\u3002\u95ee\u9898\u4fee\u6b63\u540e\u987b\u624b\u52a8\u5730\u91cd\u65b0\u542f\u7528\u8be5\u7aef\u53e3\u3002\u5728 Supervisor IOS \u4e2d\uff0c\u53ef\u4f7f\u7528\u7279\u6743\u547d\u4ee4udld reset\u6765\u91cd\u65b0\u542f\u7528\u6240\u6709\u88abUDLD\u505c\u7528\u7684\u7aef\u53e3\u3002<\/span><\/p>\n

      \n

      10\uff08\u53ef\u9009\uff09\u4f7f\u7528 Loop Guard \u7279\u6027\u6765\u589e\u5f3a STP \u7684\u7a33\u5b9a\u6027<\/span><\/strong><\/p>\n

      \n

      ( interface)\u00a0spanning-tree loopguard<\/span><\/p>\n

      Loop Guard\uff08\u73af\u8def\u9632\u62a4\uff09\u7279\u6027\u5e94\u53ea\u542f\u7528\u5728\u5df2\u77e5\u7684\u6839\u7aef\u53e3\u6216\u66ff\u6362\u6839\u7aef\u53e3\u4e0a\u3002\u4f8b\u5982\uff0c\u63a5\u5165\u5c42\u4ea4\u6362\u673a\u7684\u4e0a\u884c\u7aef\u53e3\u4e00\u5b9a\u662f\u6839\u7aef\u53e3\u6216\u66ff\u6362\u6839\u7aef\u53e3\uff0c\u539f\u56e0\u662f\u8fd9\u4e9b\u7aef\u53e3\u79bb\u6839\u6865\u6700\u8fd1\uff08\u5047\u5b9a\u7528\u6237\u5c06\u6839\u6865\u653e\u7f6e\u5728\u4e86\u7f51\u7edc\u7684\u4e2d\u5fc3\u4f4d\u7f6e\uff09\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      STP\u5de5\u4f5c\u539f\u7406 STP\u80fd\u591f\u68c0\u6d4b\u5e76\u9632\u6b622\u5c42\u6865\u63a5\u73af\u8def\u7684\u5f62\u6210\u3002\u53ef\u4ee5\u5b58\u5728\u591a\u6761\u5e76\u884c\u7684\u8def\u5f84\uff0c\u4f46\u53ea\u4f7f\u7528\u4e00\u6761\u8def\u5f84\u6765\u8f6c\u53d1\u6570\u636e\u5e27\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,2],"tags":[],"class_list":["post-9918","post","type-post","status-publish","format-standard","hentry","category-cisco","category-network"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/9918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9918"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/9918\/revisions"}],"predecessor-version":[{"id":9972,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/9918\/revisions\/9972"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}