Skip to main content
NetApp Knowledge Base

NIC port seeing CRC errors in ifstat

  1. Last updated
  2. Save as PDF
Views:
6,650
Visibility:
Public
Votes:
6
Category:
fas-systems
Specialty:
hw
Last Updated:

Applies to

  • FAS / AFF Systems
  • Networking Adapters

Issue

  • The output of the ifstat command shows high CRC errors on the affected port:

::> system node run -node <NODE_NAME> -command ifstat <PORT>

-- interface  e4a  (7 hours, 33 minutes, 13 seconds) --

RECEIVE
 Total frames:    10739k | Frames/second:     395  | Total bytes:     14537m
 Bytes/second:      534k | Total errors:     4921  | Errors/minute:      11 
 Total discards:      0  | Discards/minute:     0  | Multi/broadcast:   334k
 Non-primary u/c:     0  | CRC errors:       4921  | Runt frames:         0 
 Fragment:            0  | Long frames:         0  | Jabber:              0  

  • Following errors are reported in event logs:

[Node-02: vifmgr: vifmgr.cluscheck.crcerrors:alert]: Port e4a on node Node-02 is reporting a high number of observed CRC errors.

  • IFCONFIG-VVVM may shows the SFP Rx power is lower than expect:

    e9a: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

     media: Ethernet autoselect <rxpause,txpause> (25GBase-SR <full-duplex,rxpause,txpause>)
     status: active

     plugged: SFP/SFP+/SFP28 100GBASE-SR4 or 25GBASE-SR (LC)
     module temperature: 36.62 C voltage: 3.33 Volts
     lane 1: RX power: 0.08 mW (-11.10 dBm) TX bias: 8.02 mA


    e9a: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

     media: Ethernet autoselect <rxpause,txpause> (25GBase-SR <full-duplex,rxpause,txpause>)
     status: active

     plugged: SFP/SFP+/SFP28 100GBASE-SR4 or 25GBASE-SR (LC)
     module temperature: 38.38 C voltage: 3.33 Volts
     lane 1: RX power: 0.26 mW (-5.86 dBm) TX bias: 8.02 mA

 

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.