由于集群端口上的CRC错误较高、集群网络已降级

• ONTAP 9
• FAS/AFF系统
• NetApp集群交换机

• 由于CRC错误、集群网络降级、并且事件日志中出现以下错误：

[Node-01: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch.
[Node-01: vifmgr: vifmgr.cluscheck.hwerrors:alert]: Port e0a on node Node-01 is reporting a high number (at least 1 per 1000 packets) of observed hardware errors (CRC, length, alignment, dropped).
[Node-01: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: CRC Errors Detected - High CRC errors detected on port e0a node Node-01

• 在所有节点的集群端口上观察到较高的CRC错误：

::> system node run -node <node-name> -command ifstat <port-name>

-- interface  e0a  (4 days, 14 hours, 42 minutes, 47 seconds) --

RECEIVE
 Total frames:   86771k | Frames/second:    218  | Total bytes:     289g
 Bytes/second:    727k | Total errors:   65389 | Errors/minute:    10
 Total discards:    0  | Discards/minute:    0  | Multi/broadcast:   121k
 Non-primary u/c:    0  | CRC errors:    22207 | Runt frames:      0
 Fragment:       0  | Long frames:      0  | Jabber:      41971
 Length errors:   1211  | No buffer:       0  | Xon:          0
 Xoff:         0  | Pause:         0  | Jumbo:       31475k
 Noproto:        0  | Error symbol:    243k | Illegal symbol:   217k
 Bus overruns:     0  | Queue drops:      0  | LRO segments:   62544k

• 此外、还会在交换机侧观察到CRC错误和端口盖。
• 更换节点端的SFP不会停止这些错误。