在单个 NIC 端口上收到 CRC 错误

适用场景

• ONTAP 9
• FAS/AFF 系统
• 在单个端口上报告 CRC 错误

问题描述

• 事件日志报告物理和/或逻辑端口上的硬件错误。

[node-01: vifmgr: vifmgr.cluscheck.crcerrors]: Port a0b on node node-01 is reporting a high number of observed hardware errors, possibly CRC errors
[node-02: vifmgr: vifmgr.cluscheck.crcerrors]: Port e0d on node node-02 is reporting a high number of observed hardware errors, possibly CRC errors
[node-02: vifmgr: vifmgr.cluscheck.hwerrors:alert]: Port e0d on node node-02 is reporting a high number (at least 1 per 1000 packets) of observed hardware errors (CRC, length, alignment, dropped)
[node-02: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: CRC Errors Detected - High CRC errors detected on port e0d node node-02

• ifstat 如果ONTAP 收到错误、则输出将显示CRC错误。
• 重新 安装缆线/SFP后、受影响 ifstat -z 节点上的问题描述仍然存在。

RECEIVE
 Total frames:   36418m  | Frames/second:   23646  | Total bytes:       179t
 Bytes/second:      116m | Total errors:      170k | Errors/minute:    7
 Total discards:      0  | Discards/minute:     0  | Multi/broadcast:  1686k
 Non-primary u/c:     0  | CRC errors:       159k | Long frames:      0

• 在交换机端口或客户端上可能会出现 CRC 错误，并且可能会因数据包丢失而出现延迟

2022-03-20T17:39:36.443Z cpu36:2098075)WARNING: ScsiDeviceIO: 1498: Device naa.600a09803830574c4d5d53ddf26c4543 performance has deteriorated. I/O latency increased from average value of 18171 microseconds to 1816780 microseconds.

要记住的要点：

许多交换环境都使用直通交换、而不是存储和转发交换、因为其速度较快

• 这意味着故障硬件可能不在直接连接的链路上
• CRC可能发生在上游
• 对于 ifstat CRC错误、此值在中显示为非零值
• 如果虚电路为零但交换机具有虚电路、则可能会传输问题、但ONTAP未发现错误