In a remote office I have a 3650 and from it's 0/24 port there is a trunk to a Nortel switch. The Nortel switch has no managment (just out of the box). Anyway from time to time the trunk will shutdown and get this error:
sh log | inc 0/24
1w6d: %PM-4-ERR_DISABLE: loopback error detected on Fa0/24, putting Fa0/24 in err-disable state
Somebody suggested the possible reasons can be a link flapping, UDLD just to mention twom but these mean nothing to me :)
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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