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路径MTU黑洞可能会导致网络性能/连接问题

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适用场景

端点支持的MTU (最大过渡单元)大于路径中最小的MTU的环境。

问题描述

  • 未成功发现路径MTU的用户环境可能会同时遇到网络性能问题以及常规连接问题。
  • 性能问题可能是由于中间设备对大型MTU数据包执行IP碎片化、或者端点必须重新组装。
  • 如果大型MTU帧无法遍历网络、则通常会出现连接问题、从而导致重新传输此数据包、直到其中一个端点放弃并重置连接为止。

 

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