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由于网络设备或客户端使用 ECN-Echo 标记大多数数据包,导致吞吐量降低

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ontap-9
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适用于

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

问题

  • 吞吐量/性能缓慢,通常在读取时
  • 客户端报告的可能应用层超时
  • "netstat -s -p tcp" 显示与接收的数据包总数相比,CE 数据包数量很高:"设置了 ECN CE 位的数据包"/"接收的数据包" > 0.005
  • 数据包跟踪显示客户端或 ONTAP 接收的全部或大部分数据包的 IP ECN 字段设置为"拥塞体验"(CE),0b11Slow throughput due to network device
  • 数据包跟踪显示标有"拥塞窗口减少"(CWR) TCP 标志的全部或大部分数据包;同时,"显式拥塞体验"(ECE) 标志在多个 TCP 窗口中保持设置 Slow throughput due to network device

 

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