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New Member

ALIGN-ERR and FCS-ERR

I am getting approximately 150 ALIGN-ERR and FCS-ERR/minute on a Cat 5000 port that connects to a email server with a 100 MB card. The switch port is hard coded to 100 MB, full-duplex.

Is this normal? If not, any ideas where to start fixing this?

Thanks!

3 REPLIES
Bronze

Re: ALIGN-ERR and FCS-ERR

Is the server also hard-coded at 100/full? You have to either hard-code both ends or use auto-negotiation on both ends.

Cisco Employee

Re: ALIGN-ERR and FCS-ERR

ALIGN-ERR and FCS-ERR are the result of collisions at half-duplex, duplex mismatch, bad hardware (NIC, cable, or port), or a connected device generating frames that do not end with on an octet, and have a bad FCS.

http://www.cisco.com/warp/public/473/53.shtml#datalink

Check for any duplex/speed mismatches, then try swapping out cables, moving to different port

New Member

Re: ALIGN-ERR and FCS-ERR

Thanks- I think I found the offending NIC(s)..set to incorrect duplex/speed combinations.

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