{"id":3180,"date":"2025-05-29T17:27:02","date_gmt":"2025-05-29T09:27:02","guid":{"rendered":"https:\/\/aws-oncloudai.com\/?p=3180"},"modified":"2025-05-29T17:27:02","modified_gmt":"2025-05-29T09:27:02","slug":"aws-direct-connect-mtu-setup-and-optimization-guide","status":"publish","type":"post","link":"https:\/\/aws-oncloudai.com\/zh_hk\/aws-direct-connect-mtu-setup-and-optimization-guide\/","title":{"rendered":"AWS Direct Connect MTU \u8a2d\u5b9a\u8207\u6700\u4f73\u5316\u6307\u5357"},"content":{"rendered":"

\u5728\u4f01\u696d\u5efa\u69cb\u6df7\u5408\u96f2\u6216\u591a\u96f2\u67b6\u69cb\u7684\u904e\u7a0b\u4e2d\uff0c\u7db2\u8def\u9023\u7dda\u7684\u7a69\u5b9a\u6027\u8207\u6548\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u70ba\u4e86\u5be6\u73fe\u672c\u5730\u8cc7\u6599\u4e2d\u5fc3\u8207AWS \u96f2\u7aef\u74b0\u5883\u4e4b\u9593\u7684\u9ad8\u901f\u3001\u5b89\u5168\u9023\u63a5\uff0c\u8d8a\u4f86\u8d8a\u591a\u7684\u4f01\u696d\u9078\u64c7\u4f7f\u7528 AWS Direct Connect\uff08\u5c08\u7dda\u9023\u7dda\uff09<\/strong>\u3002\u5b83\u63d0\u4f9b\u4e86\u6bd4\u516c\u7db2\u66f4\u7a69\u5b9a\u3001\u66f4\u4f4e\u5ef6\u9072\u7684\u7db2\u8def\u50b3\u8f38\u80fd\u529b\uff0c\u6210\u70ba\u95dc\u9375\u696d\u52d9\u5834\u666f\u4e0b\u7684\u9996\u9078\u9023\u63a5\u65b9\u5f0f\u3002\u7136\u800c\uff0c\u5728Direct Connect \u7684\u90e8\u7f72\u8207\u6700\u4f73\u5316\u4e2d\uff0c\u4e00\u500b\u5e38\u88ab\u5ffd\u7565\u4f46\u81f3\u95dc\u91cd\u8981\u7684\u53c3\u6578\u4fbf\u662f MTU\uff08\u6700\u5927\u50b3\u8f38\u55ae\u5143\uff09<\/strong> \u7684\u8a2d\u5b9a\u3002<\/p>\n

MTU \u8a2d\u5b9a\u5c0d\u7db2\u8def\u7684\u541e\u5410\u6548\u7387\u3001\u5ef6\u9072\u63a7\u5236\u3001\u5c01\u5305\u5b8c\u6574\u6027\u7b49\u90fd\u6709\u76f4\u63a5\u5f71\u97ff\u3002\u672c\u6587\u5c07\u570d\u7e5eAWS Direct Connect \u4e2d\u7684MTU \u8a2d\u5b9a\u9032\u884c\u6df1\u5165\u8b1b\u89e3\uff0c\u6db5\u84cb\u5176\u57fa\u790e\u6982\u5ff5\u3001\u914d\u7f6e\u65b9\u5f0f\u3001\u9069\u7528\u5834\u666f\u3001\u512a\u5316\u5efa\u8b70\u4ee5\u53ca\u53ef\u80fd\u9047\u5230\u7684\u554f\u984c\uff0c\u5e6b\u52a9\u4f01\u696d\u5efa\u7acb\u66f4\u6709\u6548\u7387\u53ef\u9760\u7684\u5c08\u7dda\u9023\u63a5\u65b9\u6848\u3002<\/p>\n

 <\/p>\n

\u4ec0\u9ebc\u662fMTU\uff1f<\/h4>\n

MTU\uff08Maximum Transmission Unit\uff09<\/strong> \u662f\u6307\u5728\u7db2\u8def\u4e0a\u50b3\u8f38\u8cc7\u6599\u6642\uff0c\u55ae\u4e00\u8cc7\u6599\u5305\u7684\u6700\u5927\u5927\u5c0f\uff08\u55ae\u4f4d\u70ba\u4f4d\u5143\u7d44\uff09\u3002\u5982\u679c\u4e00\u500b\u5c01\u5305\u7684\u5927\u5c0f\u8d85\u904e\u4e86\u7db2\u8def\u8def\u5f91\u4e2d\u67d0\u500b\u7bc0\u9ede\u6240\u652f\u63f4\u7684MTU \u503c\uff0c\u5247\u8a72\u5c01\u5305\u5c07\u88ab\u5206\u5272\uff08\u5206\u7247\uff09\u50b3\u8f38\uff0c\u9019\u6703\u5e36\u4f86\u984d\u5916\u7684CPU \u958b\u92b7\u3001\u589e\u52a0\u7db2\u8def\u5ef6\u9072\u3001\u964d\u4f4e\u50b3\u8f38\u6548\u7387\uff0c\u751a\u81f3\u53ef\u80fd\u5c0e\u81f4\u5c01\u5305\u907a\u5931\u3002<\/p>\n

\u5728\u50b3\u7d71\u4e59\u592a\u7db2\u8def\u4e2d\uff0c\u6a19\u6e96\u7684MTU \u503c\u70ba 1500 \u5b57\u7bc0<\/strong>\u3002\u800c\u5c0d\u65bc\u8981\u6c42\u66f4\u9ad8\u7db2\u8def\u6548\u80fd\u7684\u5834\u666f\uff0c\u4f01\u696d\u901a\u5e38\u5e0c\u671b\u4f7f\u7528 Jumbo Frame\uff08\u5de8\u5e40\uff09<\/strong>\uff0c\u5176\u6700\u5927\u53ef\u652f\u63f4\u7684MTU \u503c\u70ba 9001 \u4f4d\u5143\u7d44<\/strong>\u3002<\/p>\n

 <\/p>\n

AWS Direct Connect \u4e2d\u7684MTU \u985e\u578b<\/h4>\n

AWS Direct Connect \u63d0\u4f9b\u5169\u7a2e\u4e0d\u540cMTU \u8a2d\u5b9a\u9078\u9805\uff1a<\/p>\n\n\n\n\n\n
\u985e\u578b<\/td>\nMTU \u503c<\/td>\n\u4f7f\u7528\u5834\u666f<\/td>\n<\/tr>\n
\u6a19\u6e96\u5e40<\/td>\n1500 \u5b57\u7bc0<\/td>\n\u9810\u8a2d\u8a2d\u7f6e\uff0c\u9069\u7528\u65bc\u4e00\u822c\u696d\u52d9\u9700\u6c42<\/td>\n<\/tr>\n
Jumbo Frame<\/td>\n9001 \u4f4d\u5143\u7d44<\/td>\n\u9ad8\u541e\u5410\u3001\u4f4e\u5ef6\u9072\u5834\u666f\uff0c\u5982\u5927\u6578\u64da\u50b3\u8f38\u3001\u5f71\u97f3\u4e32\u6d41\u8655\u7406\u7b49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cMTU \u7684\u8a2d\u5b9a\u5728Direct Connect \u7684\u4f7f\u7528\u9023\u7d50\u4e2d\u662f\u7aef\u5c0d\u7aef\u751f\u6548\u7684<\/strong>\u3002\u5373\u672c\u5730\u8def\u7531\u5668\u3001Direct Connect \u7684\u865b\u64ec\u4ecb\u9762\uff08VIF\uff09\u3001AWS VPC \u5b50\u7db2\u8def\u53caEC2 \u5be6\u4f8b\u7684\u7db2\u8def\u4ecb\u9762\u7b49\u5404\u74b0\u7bc0\uff0c\u90fd\u5fc5\u9808\u4e00\u81f4\u652f\u63f4\u76f8\u540c\u7684MTU \u914d\u7f6e\uff0c\u624d\u80fd\u907f\u514d\u56e0\u5c01\u5305\u5206\u7247\u6216\u62d2\u7d55\u800c\u5c0e\u81f4\u7684\u901a\u8a0a\u554f\u984c\u3002<\/p>\n

 <\/p>\n

\u4ec0\u9ebc\u5834\u666f\u5efa\u8b70\u4f7f\u7528MTU 9001\uff1f<\/h4>\n

\u4e26\u975e\u6240\u6709\u696d\u52d9\u90fd\u9700\u8981\u555f\u7528MTU 9001\uff0c\u662f\u5426\u914d\u7f6e\u5de8\u5e40\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u8a55\u4f30\u3002\u4ee5\u4e0b\u5834\u666f\u63a8\u85a6\u4f7f\u75289001 MTU\uff1a<\/p>\n

1. \u5927\u898f\u6a21\u8cc7\u6599\u50b3\u8f38<\/h5>\n

\u5982\u5728\u4f7f\u7528AWS DataSync\u3001S3 Transfer Acceleration\u3001Amazon FSx \u7b49\u670d\u52d9\u9032\u884c\u8de8\u5730\u57df\u5927\u6a94\u6848\u50b3\u8f38\u3001\u8cc7\u6599\u5eab\u540c\u6b65\u3001\u5099\u4efd\u9077\u79fb\u6642\uff0c9001 \u4f4d\u5143\u7d44\u7684MTU \u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u5206\u7247\u6578\u91cf\uff0c\u63d0\u9ad8\u50b3\u8f38\u541e\u5410\u7387\u3002<\/p>\n

2. \u5373\u6642\u4e32\u6d41\u50b3\u8f38<\/h5>\n

\u5982\u76f4\u64ad\u3001\u96a8\u9078\u8996\u8a0a\uff08VOD\uff09\u3001\u5f71\u97f3\u7de8\u89e3\u78bc\u670d\u52d9\u7b49\uff0c\u555f\u7528\u5de8\u5e40\u53ef\u964d\u4f4e\u7db2\u8def\u6296\u52d5\uff0c\u63d0\u5347\u5373\u6642\u50b3\u8f38\u7a69\u5b9a\u6027\u3002<\/p>\n

3. \u91d1\u878d\u8207\u9ad8\u983b\u4ea4\u6613\u7cfb\u7d71<\/h5>\n

\u5c0d\u5ef6\u9072\u9ad8\u5ea6\u654f\u611f\u7684\u4ea4\u6613\u7cfb\u7d71\uff08\u5982\u8b49\u5238\u3001\u5916\u532f\uff09\uff0cJumbo Frame \u80fd\u964d\u4f4e\u8cc7\u6599\u5e40\u6578\u91cf\uff0c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n

4. \u8de8\u5340\u57df\u6216\u8de8\u5e33\u6236\u9023\u63a5<\/h5>\n

\u5982\u4f01\u696d\u4f7f\u7528Direct Connect Gateway \u548cTransit Gateway \u5efa\u69cb\u8de8\u5340\u57df\u4e92\u806f\uff0c\u5728\u591a\u8df3\u7db2\u8def\u4e2d\u4f7f\u7528\u7d71\u4e00\u9ad8MTU \u53ef\u6e1b\u5c11\u8cc7\u6599\u5206\u7247\u548c\u4e2d\u9593\u7bc0\u9ede\u8655\u7406\u8ca0\u8f09\u3002<\/p>\n

 <\/p>\n

\u5982\u4f55\u5728AWS Direct Connect \u4e2d\u8a2d\u5b9aMTU\uff1f<\/h4>\n

\u914d\u7f6eMTU \u6d89\u53ca\u672c\u5730\u8a2d\u5099\u8207AWS \u96f2\u7aef\u7684\u591a\u8655\u8a2d\u7f6e\uff0c\u78ba\u4fdd\u9023\u7d50\u8def\u5f91\u4e00\u81f4\u652f\u63f4\u3002<\/p>\n

1. \u5efa\u7acb\u652f\u63f4MTU 9001 \u7684Virtual Interface\uff08VIF\uff09<\/h5>\n

\u5728AWS \u63a7\u5236\u53f0\u6216\u900f\u904eAWS CLI \u5efa\u7acbVIF \u6642\uff0c\u9700\u8981\u6307\u5b9amtu=9001\uff0c\u4f8b\u5982\uff1a<\/p>\n

aws directconnect create-private-virtual-interface \\<\/span><\/p>\n

\u2013connection-id dxcon-abc123 \\<\/span><\/p>\n

\u2013new-private-virtual-interface '{\u201cvlan\u201d:101,\u201daddressFamily\u201d:\u201dipv4\u2033,\u201dmtu\u201d:9001,\u2026}'<\/span><\/p>\n

\u82e5\u4f7f\u7528\u7684\u662fHosted VIF\uff0c\u9700\u806f\u7d61\u4ee3\u7406\u5546\u78ba\u8a8d\u662f\u5426\u555f\u7528MTU 9001 \u652f\u63f4\u3002<\/p>\n

2. \u672c\u5730\u8a2d\u5099\u914d\u7f6e<\/h5>\n

\u78ba\u4fdd\u672c\u5730\u7684\u8def\u7531\u5668\u3001\u4ea4\u63db\u5668\u8207\u7db2\u8def\u5361\u652f\u63f49001 MTU \u8a2d\u5b9a\u3002\u4f8b\u5982Cisco \u8def\u7531\u5668\u53ef\u900f\u904e\u4ee5\u4e0b\u6307\u4ee4\u8a2d\u5b9a\uff1a<\/p>\n

interface GigabitEthernet0\/0<\/span><\/p>\n

mtu 9216<\/span><\/p>\n

\u6ce8\u610f\u90e8\u5206\u8a2d\u5099\u6700\u5927MTU \u4e0d\u7b49\u65bc\u53ef\u7528MTU\uff0c\u9700\u8981\u9810\u7559Ethernet \u8a0a\u6846\u982d\u7b49\u958b\u92b7\u3002<\/p>\n

3. EC2 \u57f7\u884c\u500b\u9ad4\u8207VPC \u914d\u7f6e<\/h5>\n
    \n
  • \u9078\u64c7\u652f\u63f4ENA\uff08Elastic Network Adapter\uff09\u7684\u57f7\u884c\u500b\u9ad4\u985e\u578b<\/li>\n
  • \u5b50\u7db2\u8def\u6240\u5c6c\u7db2\u8def\u4ecb\u9762\uff08ENI\uff09\u652f\u63f4\u4fee\u6539MTU \u503c<\/li>\n<\/ul>\n

    \u5728EC2 \u5be6\u4f8b\u4e2d\u9a57\u8b49\u76ee\u524dMTU \u503c\uff1a<\/p>\n

    ip link show eth0<\/p>\n

    \u5982\u9700\u4fee\u6539\uff1a<\/p>\n

    sudo ip link set dev eth0 mtu 9001<\/span><\/p>\n

    4. \u8207Transit Gateway \u9023\u7d50\u6ce8\u610f\u4e8b\u9805<\/h5>\n

    \u82e5Direct Connect \u8207AWS Transit Gateway \u806f\u52d5\u4f7f\u7528\uff0c\u9700\u6ce8\u610fTransit Gateway \u7684\u6700\u5927MTU \u70ba 8500 \u5b57\u7bc0<\/strong>\uff0c\u5728\u9019\u7a2e\u67b6\u69cb\u4e0b\u4e0d\u80fd\u5168\u93c8\u8def\u652f\u63f49001\u3002\u5efa\u8b70\u4f7f\u7528\u8def\u5f91MTU \u63a2\u6e2c\uff08PMTUD\uff09\u6a5f\u5236\u4ee5\u9069\u61c9\u8b8a\u5316\u3002<\/p>\n

     <\/p>\n

    \u5982\u4f55\u9a57\u8b49MTU \u8a2d\u5b9a\u662f\u5426\u751f\u6548\uff1f<\/h4>\n

    \u900f\u904eping \u6307\u4ee4\u9a57\u8b49\u662f\u5426\u555f\u7528\u4e86\u5de8\u5e40\u652f\u63f4\uff1a<\/p>\n

    ping -M do -s 8973 <\u76ee\u6a19IP><\/span><\/p>\n

    \u8aaa\u660e\uff1a<\/p>\n

      \n
    • -M do<\/span>\uff1a\u7981\u6b62\u5206\u7247<\/li>\n
    • -s 8973<\/span>\uff1a\u8cc7\u6599\u5305\u5927\u5c0f+ ICMP\u982d28\u4f4d\u5143\u7d44= 9001 \u4f4d\u5143\u7d44<\/li>\n<\/ul>\n

      \u5982\u679c\u6210\u529f\u6536\u5230\u56de\u61c9\u8aaa\u660e\u8def\u5f91\u652f\u63f4MTU 9001\uff1b\u82e5\u5931\u6557\uff0c\u8868\u793a\u8def\u5f91\u4e2d\u67d0\u8655\u9023\u7d50\u4e0d\u76f8\u5bb9\u3002<\/p>\n

       <\/p>\n

      \u6392\u969c\u8207\u512a\u5316\u5efa\u8b70<\/h4>\n\n\n\n\n\n\n\n
      \u554f\u984c<\/td>\n\u539f\u56e0<\/td>\n\u5efa\u8b70<\/td>\n<\/tr>\n
      ping \u4e0d\u901a<\/td>\n\u4e2d\u9593\u9023\u7d50\u4e0d\u652f\u63f49001<\/td>\n\u9010\u8df3\u6e2c\u8a66\uff0c\u7e2e\u5c0f\u7bc4\u570d<\/td>\n<\/tr>\n
      \u8cc7\u6599\u5305\u907a\u5931<\/td>\n\u5206\u7247\u5931\u6557<\/td>\n\u7d71\u4e00\u93c8\u8defMTU \u8a2d\u5b9a<\/td>\n<\/tr>\n
      CPU \u4f54\u7528\u9ad8<\/td>\n\u5c0f\u5305\u904e\u591a<\/td>\n\u555f\u7528\u5de8\u5e40\u6e1b\u5c11\u958b\u92b7<\/td>\n<\/tr>\n
      EC2 \u7db2\u8def\u4e2d\u65b7<\/td>\n\u4fee\u6539MTU \u6642\u672a\u91cd\u555f\u670d\u52d9<\/td>\n\u4fee\u6539\u5f8c\u91cd\u65b0\u555f\u52d5\u6216\u91cd\u65b0\u6574\u7406\u7db2\u8def\u914d\u7f6e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u512a\u5316\u5efa\u8b70\uff1a<\/p>\n

        \n
      • \u5c0d\u6240\u6709\u9023\u7d50\u505a\u7aef\u5c0d\u7aefMTU \u4e00\u81f4\u6027\u6aa2\u67e5<\/li>\n
      • \u806f\u5408AWS CloudWatch\u3001VPC Flow Logs \u505a\u93c8\u8def\u8996\u89ba\u5316\u6392\u67e5<\/li>\n
      • \u4f7f\u7528AWS \u5b98\u65b9\u652f\u63f4\u5de5\u5177\u6e2c\u8a66\u50b3\u8f38\u6548\u7387\uff0c\u5982Network Performance Monitoring (NPM)<\/li>\n<\/ul>\n

         <\/p>\n

        \u7e3d\u7d50\u8207\u6700\u4f73\u5be6\u8e10<\/h4>\n
          \n
        • AWS Direct Connect \u9810\u8a2dMTU \u70ba1500\uff0c\u9069\u7528\u65bc\u4e00\u822c\u5834\u666f<\/li>\n
        • \u9ad8\u541e\u5410\/\u4f4e\u5ef6\u9072\/\u5927\u6a94\u6848\u50b3\u8f38\u5efa\u8b70\u914d\u7f6eMTU 9001<\/li>\n
        • \u5728\u8a2d\u5b9aMTU \u524d\uff0c\u8acb\u52d9\u5fc5\u78ba\u8a8d\u672c\u6a5f\u8a2d\u5099\u3001AWS \u7db2\u8def\u4ecb\u9762\u8207\u670d\u52d9\u9023\u7d50\u4e00\u81f4\u652f\u63f4<\/li>\n
        • \u914d\u5408Transit Gateway \u6642\u61c9\u4f7f\u75288500 MTU \u4e26\u78ba\u4fdd\u76f8\u5bb9\u6027<\/li>\n
        • \u4f7f\u7528ping \u6307\u4ee4\u9a57\u8b49MTU \u8a2d\u5b9a\u662f\u5426\u6b63\u78ba\uff0c\u907f\u514d\u5f8c\u671f\u696d\u52d9\u4e2d\u65b7<\/li>\n<\/ul>\n

           <\/p>\n

          \u6211\u5011\u70ba\u60a8\u63d0\u4f9b\u7684\u5c08\u696d\u670d\u52d9<\/h4>\n

          \u4f5c\u70baAWS \u4ee3\u7406\u5546\uff0c\u6211\u5011\u81f4\u529b\u65bc\u70ba\u4f01\u696d\u5ba2\u6236\u63d0\u4f9b\u5c08\u696d\u7684\u96f2\u7aef\u7db2\u8def\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n

            \n
          • Direct Connect \u5c08\u7dda\u5b58\u53d6\u8207Hosted VIF \u8a2d\u5b9a\u652f\u6301<\/li>\n
          • \u5168\u93c8\u8defMTU \u512a\u5316\u8207\u8abf\u8a66\u670d\u52d9<\/li>\n
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