{"id":4288,"date":"2021-11-26T18:11:25","date_gmt":"2021-11-27T02:11:25","guid":{"rendered":"https:\/\/www.xh86.me\/?p=4288"},"modified":"2021-11-26T18:11:25","modified_gmt":"2021-11-27T02:11:25","slug":"overlay%e5%ae%9e%e7%8e%b0%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=4288","title":{"rendered":"Overlay\u5b9e\u73b0\u6280\u672f"},"content":{"rendered":"\n\n\n\n\n\n\n
\u6280\u672f\u540d\u79f0<\/th>\n\u652f\u6301\u8005<\/th>\n\u652f\u6301\u65b9\u5f0f<\/th>\n\u7f51\u7edc\u865a\u62df\u5316\u65b9\u5f0f<\/th>\n\u6570\u636e\u65b0\u589e\u62a5\u6587\u957f\u5ea6<\/th>\n\u94fe\u8defHASH\u80fd\u529b<\/th>\n<\/tr>\n<\/thead>\n
VXLAN<\/td>\nCisco\/VMWARE\/Citrix\/Red Hat\/Broadcom<\/td>\nL2 over UDP<\/td>\nVXLAN\u62a5\u5934 24 bit VNI<\/td>\n50Byte(+\u539f\u6570\u636e)<\/td>\n\u73b0\u6709\u7f51\u7edc\u53ef\u8fdb\u884cL2 ~ L4 HASH<\/td>\n<\/tr>\n
NVGRE<\/td>\nHP\/Microsoft\/Broadcom\/Dell\/Intel<\/td>\nL2 over GRE<\/td>\nNVGRE \u62a5\u5934 24 bit VSI<\/td>\n42Byte(+\u539f\u6570\u636e)<\/td>\nGRE\u5934\u7684HASH \u9700\u8981\u7f51\u7edc\u5347\u7ea7<\/td>\n<\/tr>\n
STT<\/td>\nVMWare<\/td>\n\u65e0\u72b6\u6001TCP\uff0c\u5373L2\u5728\u7c7b\u4f3cTCP\u7684\u4f20\u8f93\u5c42<\/td>\nSTT\u62a5\u5934 64 bit Context ID<\/td>\n58 ~ 76Byte(+\u539f\u6570\u636e)<\/td>\n\u73b0\u6709\u7f51\u7edc\u53ef\u8fdb\u884c L2 ~ L4 HASH<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Generic Routing Encapsulation (GRE)<\/h2>\n

GRE\u63d0\u4f9b\u4e86IP in IP\u7684\u5c01\u88c5\u6280\u672f:<\/p>\n

\"\"<\/div><\/p>\n\n\n\n\n\n\n\n\n\n
\u6b65\u9aa4<\/th>\n\u64cd\u4f5c\/\u5c01\u5305<\/th>\n\u534f\u8bae<\/th>\n\u957f\u5ea6<\/th>\n\u5907\u6ce8<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nping -s 1448<\/td>\nICMP<\/td>\n1456 = 1448 + 8 \uff08ICMP header\uff09<\/td>\nICMP MSS<\/td>\n<\/tr>\n
2<\/td>\nL3<\/td>\nIP<\/td>\n1476 = 1456 + 20 \uff08IP header\uff09<\/td>\nGRE Tunnel MTU<\/td>\n<\/tr>\n
3<\/td>\nL2<\/td>\nEthernet<\/td>\n1490 = 1476 + 14 \uff08Ethernet header\uff09<\/td>\n\u7ecf\u8fc7 bridge \u5230\u8fbe GRE<\/td>\n<\/tr>\n
4<\/td>\nGRE<\/td>\nIP<\/td>\n1500 = 1476 + 4 \uff08GRE header\uff09+ 20 \uff08IP header\uff09<\/td>\n\u7269\u7406\u7f51\u5361 \uff08IP\uff09MTU<\/td>\n<\/tr>\n
5<\/td>\nL2<\/td>\nEthernet<\/td>\n1514 = 1500 + 14 \uff08Ethernet header\uff09<\/td>\n\u6700\u5927\u53ef\u4f20\u8f93\u5e27\u5927\u5c0f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u56e0\u6b64\uff0cGRE \u7684 overhead \u662f 1514 – 1490 = 24 byte\u3002<\/p>\n

\u53ef\u89c1\uff0c\u4f7f\u7528 GRE \u53ef\u4ee5\u6bd4\u4f7f\u7528 VxLAN \u6bcf\u6b21\u53ef\u4ee5\u591a\u4f20\u8f93 1448 – 1422 = 26 byte \u7684\u6570\u636e\u3002<\/p>\n

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

\u7531\u4e8eGRE\u6ca1\u6709\u63d0\u4f9b\u52a0\u5bc6\u548c\u9632\u6b62\u7a83\u542c\u7684\u6280\u672f\uff0c\u6545\u800c\u7ecf\u5e38\u8ddfIPSEC\u4e00\u8d77\u914d\u5408\u5b9e\u73b0\u5bf9\u6570\u636e\u7684\u52a0\u5bc6\u4f20\u8f93\u3002<\/p>\n

VXLAN<\/h2>\n

Virtual eXtensible Local Area Network (VXLAN) \u662f\u4e00\u79cd\u5c062\u5c42\u62a5\u6587\u5c01\u88c5\u5230UDP\u5305(Mac in UDP)\u4e2d\u8fdb\u884c\u4f20\u8f93\u7684\u4e00\u79cd\u5c01\u88c5\u534f\u8bae\u3002VXLAN\u4e3b\u8981\u662f\u7531Cisco\u63a8\u51fa\u7684\uff0cVXLAN\u7684\u5305\u5934\u6709\u4e00\u4e2a24bit\u7684ID\u6bb5\uff0c\u5373\u610f\u5473\u77401600\u4e07\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u865a\u62df\u7f51\u6bb5\uff0c\u8fd9\u4e2aID\u901a\u5e38\u662f\u5bf9UDP\u7aef\u53e3\u91c7\u53d6\u4f2a\u968f\u673a\u7b97\u6cd5\u800c\u751f\u6210\u7684\uff08UDP\u7aef\u53e3\u662f\u7531\u8be5\u5e27\u4e2d\u7684\u539f\u59cbMAC Hash\u751f\u6210\u7684\uff09\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u53ef\u4ee5\u4fdd\u8bc1\u57fa\u4e8e5\u5143\u7ec4\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u4fdd\u5b58VM\u4e4b\u95f4\u6570\u636e\u5305\u7684\u987a\u5e8f\uff0c\u5177\u4f53\u505a\u6cd5\u662f\u5c06\u6570\u636e\u5305\u5185\u90e8\u7684MAC\u7ec4\u6620\u5c04\u5230\u552f\u4e00\u7684UDP\u7aef\u53e3\u7ec4\u3002\u5c06\u4e8c\u5c42\u5e7f\u64ad\u88ab\u8f6c\u6362\u6210IP\u7ec4\u64ad,VXLAN\u4f7f\u7528IP\u7ec4\u64ad\u5728\u865a\u62df\u7f51\u6bb5\u4e2d\u6cdb\u6d2a\u800c\u4e14\u4f9d\u8d56\u4e8e\u52a8\u6001MAC\u5b66\u4e60\u3002\u5728VXLAN\u4e2d\uff0c\u5c01\u88c5\u548c\u89e3\u5c01\u7684\u7ec4\u4ef6\u6709\u4e2a\u4e13\u6709\u7684\u540d\u5b57\u53eb\u505aVTEP\uff0cVTEP\u4e4b\u95f4\u901a\u8fc7\u7ec4\u64ad\u53d1\u73b0\u5bf9\u65b9\u3002<\/p>\n

\"\"<\/div><\/p>\n\n\n\n\n\n\n\n\n\n\n
\u6b65\u9aa4<\/th>\n\u64cd\u4f5c\/\u5c01\u5305<\/th>\n\u534f\u8bae<\/th>\n\u957f\u5ea6<\/th>\nMTU<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nping -s 1422<\/td>\nICMP<\/td>\n1430 = 1422 + 8 \uff08ICMP header\uff09<\/td>\n<\/td>\n<\/tr>\n
2<\/td>\nL3<\/td>\nIP<\/td>\n1450 = 1430 + 20 \uff08IP header\uff09<\/td>\nVxLAN Interface \u7684 MTU<\/td>\n<\/tr>\n
3<\/td>\nL2<\/td>\nEthernet<\/td>\n1464 = 1450 + 14 \uff08Ethernet header\uff09<\/td>\n<\/td>\n<\/tr>\n
4<\/td>\nVxLAN<\/td>\nUDP<\/td>\n1480 = 1464 + 8 \uff08VxLAN header\uff09 + 8 \uff08UDP header\uff09<\/td>\n<\/td>\n<\/tr>\n
5<\/td>\nL3<\/td>\nIP<\/td>\n1500 = 1480 + 20 \uff08IP header\uff09<\/td>\n\u7269\u7406\u7f51\u5361\u7684\uff08IP\uff09MTU\uff0c\u5b83\u4e0d\u5305\u62ec Ethernet header \u7684\u957f\u5ea6<\/td>\n<\/tr>\n
6<\/td>\nL2<\/td>\nEthernet<\/td>\n1514 = 1500 + 14 \uff08Ethernet header\uff09<\/td>\n\u6700\u5927\u53ef\u4f20\u8f93\u5e27\u5927\u5c0f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u56e0\u6b64\uff0cVxLAN \u7684 overhead \u662f1514- 1464 = 50 byte\u3002<\/p>\n

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

\u57fa\u4e8e\u7ec4\u64ad\u7684 VXLAN \u7f51\u7edc\u5176\u5b9e\u662f\u6ca1\u6709\u63a7\u5236\u5e73\u9762\u7684\uff0c\u4f9d\u8d56\u4e8e\u6570\u636e\u5e73\u9762\u7684 flood-and-learn\uff0c\u5982\u679c\u4ea4\u6362\u673a\u4e0d\u652f\u6301\u7ec4\u64ad\u7684\u8bdd\uff0c\u5c06\u4f1a\u9000\u5316\u5230\u5e7f\u64ad\uff0c\u76ee\u524d\u8fd9\u7c7b\u7684\u5e94\u7528\u5df2\u7ecf\u5f88\u5c11\u4e86\u3002\u4e3a\u4e86\u89e3\u51b3\u7ec4\u64ad\u7684\u4f9d\u8d56\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u901a\u8fc7 HER \u7684\u65b9\u6cd5\u590d\u5236\u62a5\u6587\u6210\u5355\u64ad\uff0c\u8fd9\u6837\u7ec4\u64ad\u62a5\u6587\u6216\u8005\u5e7f\u64ad\u62a5\u6587\u53ef\u4ee5\u901a\u8fc7\u5355\u64ad\u590d\u5236\u7684\u5f62\u5f0f\u53d1\u9001\uff0c\u8fd9\u79cd\u65b9\u5f0f\u88ab\u79f0\u4e3a Head-End Replication\u3002Open vSwitch Driver \u5b9e\u73b0\u7684 VXLAN \u5373\u4f7f\u7528\u7c7b\u4f3c\u8fd9\u79cd\u65b9\u5f0f\u907f\u514d\u7ec4\u64ad\u7684\u4f9d\u8d56\u3002HER \u5728\u5373\u4f7f\u6709\u63a7\u5236\u5e73\u9762\u7684\u60c5\u51b5\u4e0b\u4f9d\u7136\u5177\u5907\u4ef7\u503c\uff0c\u56e0\u4e3a\u6709\u53ef\u80fd\u6709\u9759\u9ed8\u4e3b\u673a\u3001MAC \u8868\u9879\u8001\u5316\u3001\u865a\u62df\u673a\u9700\u8981\u4f7f\u7528\u7ec4\u64ad\u6216\u5e7f\u64ad\u8fbe\u6210\u4e1a\u52a1\u7684\u9700\u6c42\u3002<\/p>\n

VXLAN Offload<\/h3>\n

\u4e00\u4e9b\u65b0\u578b\u53f7\u7684\u7f51\u5361(Intel X540 or X710)\uff0c\u5177\u5907VXLAN\u786c\u4ef6\u5c01\u5305\uff0f\u89e3\u5305\u80fd\u529b\u3002\u5f00\u542f\u786c\u4ef6VXLAN offload\uff0c\u5e76\u4f7f\u7528\u8f83\u5927\u7684MTU\uff08\u59829000\uff09\uff0c\u53ef\u4ee5\u660e\u663e\u63d0\u5347\u865a\u62df\u7f51\u7edc\u7684\u6027\u80fd\u3002<\/p>\n

\u5f00\u542f\u6216\u5173\u95edvxlan offload\u7684\u65b9\u6cd5<\/h3>\n
ethtool -k <eth0\/eth1> tx-udp_tnl-segmentation <on\/off>\r\n<\/code><\/pre>\n
VXLAN\u8f6c\u53d1\u8fc7\u7a0b<\/h3>\n
\u540cVXLAN ID\u5185\u8f6c\u53d1<\/h4>\n
VXLAN\u6700\u65e9\u4f9d\u9760\u7ec4\u64ad\u6cdb\u6d2a\u7684\u65b9\u5f0f\u6765\u8f6c\u53d1\uff0c\u4f46\u8fd9\u4f1a\u5bfc\u81f4\u4ea7\u751f\u5927\u91cf\u7684\u7ec4\u64ad\u6d41\u91cf\u3002\u6240\u4ee5\uff0c\u5728\u5b9e\u9645\u751f\u4ea7\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528SDN\u63a7\u5236\u5668\u7ed3\u5408\u5357\u5411\u534f\u8bae\u6765\u907f\u514d\u7ec4\u64ad\u95ee\u9898\u3002<\/p>\n
\"\"<\/div>\u00a0(\u56fe\u7247\u6765\u81eacsdn<\/a>)<\/p>\n
\u4e0d\u540cVXLAN ID\u8f6c\u53d1<\/h4>\n
\u5927\u81f4\u8f6c\u53d1\u8fc7\u7a0b\u4e0e\u4e0a\u9762\u7c7b\u4f3c\uff0c\u6240\u4e0d\u540c\u7684\u662f\u9700\u8981\u62a5\u6587\u5728\u6240\u5c5evtep\u6216\u8005vxlan gateway\u5904\u6765\u8f6c\u6362vxlan id\uff08\u6e90\u548c\u76ee\u7684\u5904\u90fd\u9700\u8981\u505a\u8fd9\u4e2a\u8f6c\u6362\uff09\u3002<\/p>\n
VXLAN\u4e0e\u975eVXLAN\uff08\u5982VLAN\uff09\u8f6c\u53d1<\/h4>\n
\u9700\u8981VXLAN Gateway\u6765\u8f6c\u6362vxlan vni\u548cvlan id\uff1a<\/p>\n
   +---+-----+---+                                    +---+-----+---+\r\n   |    Server 1 |                                    |  Non-VXLAN  |\r\n   (VXLAN enabled)<-----+                       +---->|  server     |\r\n   +-------------+      |                       |     +-------------+\r\n                        |                       |\r\n   +---+-----+---+      |                       |     +---+-----+---+\r\n   |Server 2     |      |                       |     |  Non-VXLAN  |\r\n   (VXLAN enabled)<-----+   +---+-----+---+     +---->|    server   |\r\n   +-------------+      |   |Switch acting|     |     +-------------+\r\n                        |---|  as VXLAN   |-----|\r\n   +---+-----+---+      |   |   Gateway   |\r\n   | Server 3    |      |   +-------------+\r\n   (VXLAN enabled)<-----+\r\n   +-------------+      |\r\n                        |\r\n   +---+-----+---+      |\r\n   | Server 4    |      |\r\n   (VXLAN enabled)<-----+\r\n   +-------------+\r\n<\/code><\/pre>\n
MPBGP EVPN VXLAN<\/h3>\n
\"\"<\/div><\/p>\n
\u6bcf\u4e00\u4e2a VTEP \u5c06\u4f5c\u4e3a\u4e00\u4e2a BGP Speaker\uff0c\u5411\u5176\u4ed6 VTEP \u901a\u8fc7 EVPN \u53d1\u9001\u672c\u5730\u7684 MAC\u3001IP \u4fe1\u606f\uff0cBGP RR \u53ef\u4ee5\u907f\u514d BGP \u7684 Full-Mesh\uff0c\u63d0\u9ad8\u901a\u4fe1\u6548\u7387\u3002\u5f97\u76ca\u4e8e\u63a7\u5236\u5e73\u9762\uff0c\u6bcf\u4e2a VTEP \u5c06\u53ef\u4f5c\u4e3a\u5206\u5e03\u5f0f\u7f51\u5173\u3001\u53ef\u4ee5\u6291\u5236 ARP \u5e7f\u64ad\u3001\u53ef\u4ee5\u5c06\u5e7f\u64ad\u6216\u7ec4\u64ad\u901a\u8fc7\u5355\u64ad\u590d\u5236\u6765\u63d0\u5347\u6548\u7387\u3001\u53ef\u4ee5\u5bf9 VTEP \u8fdb\u884c\u8ba4\u8bc1\u3002<\/p>\n
\u5177\u4f53\u5230 BGP \u79df\u7f51\u4e0a\uff0c\u6709\u51e0\u79cd\u9009\u62e9\uff0c\u5305\u62ec iBGP\u3001eBGP \u7684\u9009\u62e9\u548c\u5916\u90e8\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n
\"\"<\/div><\/p>\n
\u8fd9\u79cd\u6a21\u578b\u4e0b VTEP \u53ea\u5728 Leaf \u4e0a\uff0cSpine \u4e2d\u9009\u53d6\u4e24\u4e2a\u4f5c\u4e3a iBGP RR\uff0cSpine \u4e0d\u9700\u8981\u4f5c\u4e3a VTEP\u3002\u6b64\u5916 RR \u4e5f\u53ef\u4ee5\u6709\u591a\u79cd\u653e\u7f6e\u65b9\u6cd5\uff0c\u4f8b\u5982\u5728 Leaf \u4e0a\uff0c\u8fd9\u6837 Spine \u4e0d\u9700\u8981\u8fd0\u884c MPBGP EVPN\uff0c\u6216\u8005\u5728\u989d\u5916\u7684\u4e13\u95e8\u7f51\u7edc\u8bbe\u5907\u3002<\/p>\n
\u5982\u679c\u662f eBGP\uff0c\u5178\u578b\u7684\u90e8\u7f72\u65b9\u6cd5\u5982\u4e0b\u56fe\uff0c\u597d\u5904\u662f Spine \u4f5c\u4e3a eBGP Peer\uff0c\u800c\u4e0d\u662f iBGP RR\uff0cSpine\uff0cSpine\u4e0a \u7684 BGP \u9700\u8981\u6709\u5bf9 address-family l2vpn evpn \u7684\u8f6c\u53d1\u80fd\u529b\uff0c\u4f46\u4e0d\u9700\u8981\u652f\u6301 VXLAN\u3002\u6240\u6709 Leaf \u53ef\u4ee5\u8bbe\u7f6e\u5404\u81ea\u7684 AS\uff0c\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u540c\u4e00 AS\uff0ceBGP \u8fd0\u7ef4\u96be\u5ea6\u8f83\u9ad8\uff0c\u53c2\u8003\u8bbe\u8ba1\u89c1 draft-ietf-rtgwg-bgp-routing-large-dc\uff0c\u76ee\u524d\u4e00\u822c\u8f83\u5c11\u91c7\u7528\u3002<\/p>\n
\"\"<\/div><\/p>\n
Distributed Anycast Gateway<\/h3>\n
IETF \u5728 draft-ietf-bess-evpn-inter-subnet-forwarding\u4e2d\u5bf9\u5728 EVPN \u4e2d\u5c5e\u4e8e\u4e0d\u540c\u7684 VxLan \u4e0b\u5982\u4f55\u901a\u8fc7 Integrated Routing and Bridging\uff08\u4ee5\u4e0b\u7b80\u79f0 IRB\uff09\u5904\u7406\u8de8\u5b50\u7f51\u901a\u4fe1\u505a\u4e86\u8bf4\u660e\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0cEVPN VxLan \u63d0\u4f9b\u4e86\u539f\u751f\u7684\u57fa\u4e8e IRB \u7684\u5206\u5e03\u5f0f\u4e09\u5c42\u7f51\u5173\u53c2\u8003\u3002<\/p>\n
\u7136\u800c EVPN VxLan \u7684\u5b9e\u9645\u8def\u7531\u8fc7\u7a0b\u53ef\u4ee5\u5206\u6210\u4e24\u6b65\u6765\u8c08\uff0c\u7b2c\u4e00\u90e8\u5206\u662f\u865a\u62df\u673a\u7684 First-hop \u7684\u5730\u5740\uff0c\u5373\u7f51\u5173\u5730\u5740\uff0c\u7b2c\u4e8c\u90e8\u5206\u662f\u5982\u4f55\u5728\u4e0d\u540c VxLan \u95f4\u8def\u7531\uff08IRB\uff09\uff0c\u672c\u8282\u4f1a\u5148\u8c08\u7f51\u5173\u5730\u5740\u7684\u95ee\u9898\u3002<\/p>\n
\u76ee\u524d\u4e00\u79cd\u5b9e\u8df5\u662f\u4f7f\u7528 Anycast Gateway \u6280\u672f\uff0c\u6bcf\u4e2a VTEP \u4e0a\u5747\u914d\u7f6e\u76f8\u540c\u7684 vIP \u548c vMAC\uff0c\u5982\u56fe\uff1a<\/p>\n
\"\"<\/div><\/p>\n
\u8fd9\u6837\u9996\u5148\u6bcf\u4e2a\u865a\u62df\u673a\u7684\u7f51\u5173\u90fd\u5728\u6700\u8fd1\u7684 VTEP \u4e0a\uff0c\u53ef\u4ee5\u4f18\u5316\u7f51\u7edc\u8def\u5f84\uff0c\u5176\u6b21\u5f53\u865a\u62df\u673a\u53d1\u751f\u8fc1\u79fb\u65f6\uff0c\u4e0d\u4f1a\u9700\u8981\u91cd\u65b0\u83b7\u53d6\u9ed8\u8ba4\u7f51\u5173\u7684 ARP\u3002\u5728\u4e00\u4e9b\u5382\u5546\u4e2d\uff0c\u8fd9\u9879\u6280\u672f\u88ab\u79f0\u4e3a Static Anycast Gateway\u3002<\/p>\n
Integrated Routing and Bridging<\/h3>\n
IRB \u5373 VTEP \u63d0\u4f9b\u4e09\u5c42\u548c\u4e8c\u5c42\u529f\u80fd\uff0c\u4f46\u662f\u5bf9\u4e8e\u5177\u4f53\u5982\u4f55\u8def\u7531\uff0c\u76ee\u524d\u5b58\u5728\u4e24\u79cd\u65b9\u6cd5\uff0c\u5206\u522b\u4e3a Asymmetric IRB mode \u548c Symmetric IRB mode\u3002\u524d\u8005\u662f\u975e\u5bf9\u79f0\u6a21\u5f0f\uff0c\u540e\u8005\u662f\u5bf9\u79f0\u6a21\u5f0f\uff0c\u5bf9\u4e8e Asymmetric\uff0c\u7ed3\u5408 Anycast Gateway \u540e\u8def\u5f84\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
\"\"<\/div><\/p>\n
\u62a5\u6587\u7531\u865a\u62df\u673a\u53d1\u51fa\u65f6\uff0c\u76ee\u7684 MAC \u662f\u7f51\u5173\u7684\u865a\u62df MAC\uff0cVTEP-1 \u6536\u5230\u62a5\u6587\u540e\u67e5\u8be2\u8def\u7531\u627e\u5230 IP-2 \u5bf9\u5e94\u7684\u865a\u62df\u673a\uff0c\u67e5\u8be2\u5230\u5bf9\u5e94\u7684 VTEP \u4e3a VTEP-2 \u540e\uff0c\u5c01\u4e0a VxLan \u7684\u5934\u90e8\u53d1\u5230 VTEP-2\uff0c\u5e76\u5c06 VNI \u8bbe\u7f6e\u4e3a\u5bf9\u65b9\u7684 VNI-B\uff0cVTEP-2 \u6536\u5230\u62a5\u6587\u540e\uff0c\u5c06 VxLan \u5934\u90e8\u5265\u6389\u6362\u6210 Vlan \u5e76\u53d1\u5f80 VM-2\u3002<\/p>\n
\u5f53\u865a\u62df\u673a\u9700\u8981\u56de\u590d\u65f6\uff0c\u8def\u5f84\u5b8c\u5168\u53cd\u8fc7\u6765\uff0c\u5373\u5728 VTEP-2 \u4e0a\u5b8c\u6210 VXLAN \u5c01\u5305\u548c\u8bbe\u7f6e VNI \u4e3a VNI-A\u3002\u6240\u4ee5\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u975e\u5bf9\u79f0\u7684\u3002<\/p>\n
\u8fd9\u79cd\u5b9e\u73b0\u5b58\u5728\u4e00\u4e9b\u663e\u800c\u6613\u89c1\u7684\u95ee\u9898\uff1a<\/p>\n
    \n
  • \u6240\u6709\u7684 VTEP \u5fc5\u987b\u914d\u7f6e\u4e0a\u6240\u6709\u7684 VXALN VNI\uff0c\u5426\u5219\u4e0d\u540c VNI \u901a\u4fe1\u4f1a\u5b58\u5728\u95ee\u9898\uff1b<\/li>\n
  • \u6240\u6709\u7684 VTEP \u5fc5\u987b\u83b7\u6574\u4e2a Fabric \u5b8c\u6574\u7684 Host tables \u4fe1\u606f\uff0c\u5426\u5219\u65e0\u6cd5\u5b8c\u6210\u5b8c\u8def\u7531\u3002<\/li>\n<\/ul>\n
    \u53e6\u4e00\u79cd\u5b9e\u73b0\u65b9\u6cd5\u662f Symmetric IRB\uff0c\u5176\u5b9e\u73b0\u4e0e Asymmetric IRB \u6700\u663e\u8457\u7684\u4e0d\u540c\u662f\u6e90 VTEP \u548c\u76ee\u6807 VTEP \u90fd\u4f1a\u627f\u62c5\u4e09\u5c42\u548c\u4e8c\u5c42\u529f\u80fd\uff0c\u800c\u4e0d\u50cf Symmetric IRB \u53ea\u5728\u6e90 VTEP \u505a\u8def\u7531\u3002\u8fd9\u6837\u6700\u7ec8\u5b9e\u73b0\u662f\u5bf9\u79f0\u7684\uff0c\u4f46\u524d\u63d0\u662f\u5fc5\u987b\u5f15\u5165\u4e00\u4e2a\u65b0\u7684\u6982\u5ff5\u5373 L3 VNI\u3002<\/p>\n
    \u5728 Symmetric IRB \u4e2d\uff0c\u6bcf\u4e2a\u79df\u6237\u7684 VRF \u4f1a\u5206\u914d\u4e00\u4e2a L3 VNI\uff0c\u53ef\u8fbe\u4fe1\u606f\uff08NLDR\uff09\u4f1a\u5728\u540c\u4e00\u4e2a L3 VNI \u4e0b\u540c\u6b65\uff0c\u8fd9\u6837\u6bcf\u6b21\u8def\u7531\u9700\u8981\u5c06\u5916\u5c42 VXLAN \u76ee\u7684\u5730\u5740\u8bbe\u7f6e\u4e3a\u76ee\u7684 VTEP \u7684\u5730\u5740\uff0c\u5c06 VNI \u8bbe\u7f6e\u4e3a L3 VNI\u3002\u00a0
    \"\"<\/div><\/p>\n
    \u4ece\u4e0a\u9762\u7684\u5206\u6790\u53ef\u4ee5\u5f97\u77e5\uff0cSymmetric IRB \u6700\u5927\u7684\u597d\u5904\u4e00\u662f\u4e0d\u9700\u8981\u6240\u6709 VTEP \u5747\u914d\u7f6e\u6240\u6709 VNI\uff0c\u4e8c\u662f\u4e0d\u9700\u8981\u6240\u6709\u7684 VTEP \u77e5\u9053\u6574\u4e2a Fabric \u7684\u5b8c\u6574 Host tables \u4fe1\u606f\u3002\u4f46\u662f\uff0c\u8fd9\u662f\u5efa\u7acb\u5728\u4e0d\u662f\u6700\u5dee\u60c5\u51b5\u7684\u524d\u63d0\uff0c\u5982\u679c\u8bf4\u6070\u597d\u6bcf\u4e2a\u79df\u6237\u90fd\u5728\u6bcf\u4e2a VTEP \u4e0b\u5177\u6709\u865a\u62df\u673a\uff0c\u6216\u7740\u6574\u4e2a\u7f51\u7edc\u53ea\u6709\u4e00\u4e2a\u79df\u6237\uff0c\u90a3\u4e48\u7f51\u7edc\u53ef\u80fd\u4ea7\u751f\u9000\u5316\u3002Symmetric IRB \u7684\u4e3b\u8981\u4f18\u5316\u573a\u666f\u662f\u9488\u5bf9\u591a\u79df\u6237\u7684\u3002<\/p>\n
    \"\"<\/div><\/p>\n
    NVGRE<\/h2>\n
    NVGRE\u4e3b\u8981\u652f\u6301\u8005\u662fMicrosoft\u3002\u4e0eVXLAN\u4e0d\u540c\u7684\u662f\uff0cNVGRE\u6ca1\u6709\u91c7\u7528\u6807\u51c6\u4f20\u8f93\u534f\u8bae\uff08TCP\/UDP\uff09\uff0c\u800c\u662f\u501f\u52a9\u901a\u7528\u8def\u7531\u5c01\u88c5\u534f\u8bae\uff08GRE\uff09\u3002NVGRE\u4f7f\u7528GRE\u5934\u90e8\u7684\u4f4e24\u4f4d\u4f5c\u4e3a\u79df\u6237\u7f51\u7edc\u6807\u8bc6\u7b26\uff08TNI\uff09\uff0c\u4e0eVXLAN\u4e00\u6837\u53ef\u4ee5\u652f\u63011600\u4e2a\u865a\u62df\u7f51\u7edc\u3002\u4e3a\u4e86\u63d0\u4f9b\u63cf\u8ff0\u5e26\u5bbd\u5229\u7528\u7387\u7c92\u5ea6\u7684\u6d41\uff0c\u4f20\u8f93\u7f51\u7edc\u9700\u8981\u4f7f\u7528GRE\u5934\uff0c\u4f46\u662f\u8fd9\u5bfc\u81f4NVGRE\u4e0d\u80fd\u517c\u5bb9\u4f20\u7edf\u8d1f\u8f7d\u5747\u8861\uff0c\u8fd9\u662fNVGRE\u4e0eVXLAN\u76f8\u6bd4\u6700\u5927\u7684\u533a\u522b\u4e5f\u662f\u6700\u5927\u7684\u4e0d\u8db3\u3002\u4e3a\u4e86\u63d0\u9ad8\u8d1f\u8f7d\u5747\u8861\u80fd\u529b\u5efa\u8bae\u6bcf\u4e2aNVGRE\u4e3b\u673a\u4f7f\u7528\u591a\u4e2aIP\u5730\u5740\uff0c\u786e\u4fdd\u66f4\u591a\u6d41\u91cf\u80fd\u591f\u88ab\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n
    NVGRE\u4e0d\u9700\u8981\u4f9d\u8d56\u6cdb\u6d2a\u548cIP\u7ec4\u64ad\u8fdb\u884c\u5b66\u4e60\uff0c\u800c\u662f\u4ee5\u4e00\u79cd\u66f4\u7075\u6d3b\u7684\u65b9\u5f0f\u8fdb\u884c\u5e7f\u64ad\uff0c\u4f46\u662f\u8fd9\u9700\u8981\u4f9d\u8d56\u786c\u4ef6\/\u4f9b\u5e94\u5546\u3002\u6700\u540e\u4e00\u4e2a\u533a\u522b\u5173\u4e8e\u5206\u7247\uff0cNVGRE\u652f\u6301\u51cf\u5c0f\u6570\u636e\u5305\u6700\u5927\u4f20\u8f93\u5355\u5143\u4ee5\u51cf\u5c0f\u5185\u90e8\u865a\u62df\u7f51\u7edc\u6570\u636e\u5305\u5927\u5c0f\uff0c\u4e0d\u9700\u8981\u8981\u6c42\u4f20\u8f93\u7f51\u7edc\u652f\u6301\u4f20\u8f93\u5927\u578b\u5e27\u3002<\/p>\n
    \"\"<\/div><\/p>\n
    STT<\/h2>\n
    STT\uff08Stateless Transport Tunneling Protocol\uff09\u662fNicira\u63d0\u4ea4\u7684\u96a7\u9053\u534f\u8bae\uff0c\u7c7b\u4f3c\u4e8eVXLAN\u548cVGGRE\uff0c\u5b83\u4e5f\u662f\u628a\u4e8c\u5c42\u7684\u5e27\u5c01\u88c5\u5728\u4e00\u4e2aip\u62a5\u6587\u7684payload\u4e2d\uff0c\u5e76\u5728\u524d\u9762\u589e\u52a0\u4e86tcp\u5934\u548cSTT\u5934\u3002\u6ce8\u610f\uff0cSTT\u7684tcp\u5934\u662f\u7cbe\u5fc3\u6784\u9020\u51fa\u6765\u7684\uff0c\u4ee5\u4fbf\u5229\u7528TSO\u3001LRO\u3001GRO\u7b49\u7f51\u5361\u7279\u6027\u3002<\/p>\n
    Geneve<\/h2>\n
    Geneve\uff08Generic Network Virtualization Encapsulation\uff09\u65e8\u5728\u7edf\u4e00VXLAN\u3001NVGRE\u7b49\u5404\u79cd\u65b9\u6848\uff0c\u63d0\u4f9b\u66f4\u7075\u6d3b\u4e14\u9002\u7528\u5404\u79cd\u865a\u62df\u5316\u573a\u666f\u7684\u901a\u7528\u5c01\u88c5\u534f\u8bae\u3002<\/p>\n
    Geneve\u4f7f\u7528UDP\u5c01\u5305\uff0c\u7aef\u53e3\u53f7\u4e3a6081\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u6280\u672f\u540d\u79f0 \u652f\u6301\u8005 \u652f\u6301\u65b9\u5f0f \u7f51\u7edc\u865a\u62df\u5316\u65b9\u5f0f \u6570\u636e\u65b0\u589e\u62a5\u6587\u957f\u5ea6 \u94fe\u8defHASH\u80fd\u529b VXLAN Cisco\/VMW […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4288","post","type-post","status-publish","format-standard","hentry","category-cisco"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/4288","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=4288"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/4288\/revisions"}],"predecessor-version":[{"id":4289,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/4288\/revisions\/4289"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}