RE: Err-disable

Amin,

Well, you might look to see whether or not the issues are related to
spanning-tree (i.e. BPDU guard). That's usually the most common cause. If
you're running port security on that port you might do show port-security
interface command to see if that is causing the issue. UDLD might also cause
a port to go into an err-disabled state as well, however it's more commonly
used on fiber interfaces. I'm sure some of the experts on here can comment
on other things to check as well, but these are what I've run into most
often.

HTH,

George

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Amin
Sent: Friday, May 13, 2011 10:53 AM
To: ccielab_at_groupstudy.com
Subject: Err-disable

Hi experts,

How I can verify the cause of putting the switch port in err-disable?

Regards,

Amin

Amin

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Received on Fri May 13 2011 - 13:16:09 ART