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由于网络设备或客户端使用ECN-echo标记了大多数数据包、因此吞吐量较慢

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Category:
ontap-9
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nas<a>ECN</a>
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适用场景

  • ONTAP 9.6及更高版本
  • 客户端/网络正在使用TCP显式拥塞通知(ECN)

问题描述

  • 吞吐量/性能较低、通常在读取时
  • 客户端报告的可能应用程序层超时
  • 与接收的总数据包相比、"Netstat -s -p tcp"显示的CE数据包数量较多:"Packets with ECN CE bit Set"(设置了ECN CE位的数据包)/"Packets received"(接收的数据包)>0.005
  • 数据包跟踪显示客户端或ONTAP收到的全部或大部分数据包、IP ECN字段设置为"拥 塞已经历"(CE)、0b11由于网络设备、吞吐量较慢
  • 数据包跟踪显示标记有“拥塞窗口减少”(CWR) TCP标志的所有或大多数数据包;同时,“显式拥塞已经历”(ECE)标志仍会设置为多个TCP窗口  由于网络设备、吞吐量较慢

 

 

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