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Webcast-Catalyst9k
New Member

cat 2900 errors

Hi

Can anyone give me a good document detailing crc erros etc recorded on my swtitch and how to go about troubleshooting them

for example what is high number incomparision to traffic

thanks

elaine

2 REPLIES
Cisco Employee

Re: cat 2900 errors

New Member

Re: cat 2900 errors

Elaine,

Most of the CRC errors that I have experienced with 2900s are due to auto-sensing speed and duplex across links. This may or may not be your problem, but I would nail down most of your speed/duplex settings if you haven't already. I do not know of any documentation on CRC errors and what the upper limits and such would be. The rule of thumb we use here is that we first clear the counters on the switch and then take our measurement, if over the next 1-3 minutes see more than 10-ish we will begin troubleshooting. Usually our first step is auto-sensing. I do not recall a crc error that was not caused by either an auto-sensing, or bad port problem on either end. I hope this helps...

-Bo

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