Input and CRC errors

[abarb002]

I am experiencing a high volume of input and CRC errors to the point that my ports disabling and enabling themselves. These are two Ten gig ports that are port channeled to a layer 3 switch. Is there a way to prevent this errors? I've already swapped cables, but that didn't seem to work. I'm using a 3850 switch. 

[Reza Sharifi]

Can you check speed and duplex on both sides of the interfaces to make sure they are matching?

HTH

[Leo Laohoo]

Post the complete output to the command "sh interface <PORT> controll".

[julian.bendix · Accepted solution]

Hi!

CRC Errors most commonly indicate that there is something wrong at hardware level, 
but it can be speed/duplex mismatch as well.

Are both sides Catalyst 3850?

If no, what is the other side of the port-channel?

Can you post the following outputs?

#show interface <type> <num>

#show run interface <type> <num>

#show interface <type> <num> controller

Best regards
Julian

[abarb002]

Was able to get replacement cables and that solved the issue. Thanks. 

[cmarva]

when you say disabling themselves do you mean they are going errdisabled? If so the reason will be in the log.

[abarb002 · Accepted solution]

The log was first saying flapping between ports Te 3 and 4. I was receiving a high number of input and CRC errors. These are fiber connections and I don't have replacement cables. So I'm praying this isn't the issue. 

[Leo Laohoo]

Post the complete output to the command "sh interface <PORT> controll".

[abarb002]

Was able to get replacement cables and that solved the issue. Thanks.