VxRail：网络 NIC 统计信息上的高 vSAN 延迟和 CRC 错误数

Summary: 多个主机出现大量 CRC 错误，导致 vSAN 延迟。

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Symptoms

  • 从 群集 >监视>vSAN 运行状况：MTU 检查（带有较大数据包大小的 ping）：请参阅文章 VxRail：MTU 检查（带有较大数据包的 ping）
  • 主机大型 ping 测试（MTU 检查）间歇性失败
  • vSAN 上出现大量 CRC 错误 vmnics 统计计数器
esxcli network nic stats get -n vmnic1

 host1
 NIC statistics for vmnic1:
 Receive packets dropped: 0
 Transmit packets dropped: 0
 Total receive errors: 216001
 Receive length errors: 0
 Receive over errors: 0
 Receive CRC errors: 216001
 Receive frame errors: 0

 host2
 NIC statistics for vmnic1:
 Receive packets dropped: 0
 Transmit packets dropped: 0
 Total receive errors: 283604
 Receive length errors: 0
 Receive over errors: 0
 Receive CRC errors: 283604
 Receive frame errors: 0

 host3
 NIC statistics for vmnic1:
 Receive packets dropped: 0
 Transmit packets dropped: 0
 Total receive errors: 0
 Receive length errors: 0
 Receive over errors: 0
 Receive CRC errors: 0
 Receive frame errors: 0

 host4
 NIC statistics for vmnic1:
 Receive packets dropped: 0
 Transmit packets dropped: 0
 Total receive errors: 170796
 Receive length errors: 0
 Receive over errors: 0
 Receive CRC errors: 170796

Cause

高 CRC 错误是第 1 层问题的症状。可能是线缆、SFP 或网络接口卡 （NIC） 有缺陷。

以上统计信息表明 host1、host2 和 host4 从 host3 接收 CRC（入站），而 host3 可能是导致 vSAN 性能问题的 CRC 错误的来源。

Resolution

  1. 要查看 CRC 错误增加，请运行命令：
watch esxcli network nic stats get -n=vmnic1 | grep "Receive CRC errors"
  1. 关闭到 vmnic1 的上行链路：
esxcli network nic down -n vmnic1

提醒：确保存在上行链路冗余（例如 vmnic0、vmnic1），然后再将链路状态更改为关闭状态。此时，您应该不会看到 CRC 错误增加，也不会出现 vSAN 延迟。
 
  1. 更换连接到 vSAN 上行链路 1 的 SFP，并将上行链路状态更改为 UP。此外，如果 SFP 更换没有阻止 CRC 错误，您还可以考虑更换上行链路的线缆。

Affected Products

VMWare Cloud on Dell EMC VxRail E560F, VMWare Cloud on Dell EMC VxRail E560N, VxRail 460 and 470 Nodes, VxRail Appliance Family, VxRail Appliance Series, VxRail G Series Nodes, VxRail E Series Nodes, VxRail E560 VCF, VxRail E560F VCF , VxRail E560N VCF ...

Products

VxRail E560, VxRail E560F, VxRail E560N, VxRail E660, VxRail E660F, VxRail E660N, VxRail E665, VxRail E665F, VxRail E665N, VxRail G560, VxRail G560 VCF, VxRail G560F, VxRail G560F VCF, VxRail P Series Nodes, VxRail P570, VxRail P570F, VxRail P580N , VxRail P670F, VxRail P670N, VxRail P675F, VxRail P675N, VxRail S Series Nodes, VxRail S570, VxRail S570 VCF, VxRail S670, VxRail Software, VxRail V470, VxRail V570, VxRail V570 VCF, VxRail V570F, VxRail V570F VCF, VXRAIL V670F, VxRail VD-4510C, VxRail VD-4520C, VxRail VE-660, VxRail VE-6615, VxRail VP-760, VxRail VP-7625, VxRail VS-760 ...
Article Properties
Article Number: 000182663
Article Type: Solution
Last Modified: 10 Sep 2025
Version:  7
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