nexus switch copp associated with CRC value increase ?

king123u · ‎06-10-2025

When testing continuously flying ICMP (Ping) on Nexus 9000 Series, the ping falls out in the pattern because of COPP, does the interface CRC value increase at this time?

marce1000 · ‎06-10-2025

@king123u - No because CRC errors typically indicate physical layer issues, such as faulty cables, bad transceivers, or electromagnetic interference, rather than CoPP-related packet drops

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Joseph W. Doherty · ‎06-10-2025

Additionally, a CRC error should preclude the ingress frame from even being considered by CoPP.

Also, CRC errors can be "normal" because there's an expected corruption bit error rate, but it's very, very (very) small. (You can also have corruption not detected by a CRC, at, I believe, even a lower chance.)

If CRC errors higher than spec, and higher than acceptable to you, mitigation should be done.