My network is very huge network. In this network there are somewhere network loop.which cause shutdown of uplink ports.How to find out these network loop?& what is solution to prevent shutdown of uplink port? Pls Suggest.
Can you please update a bit about your topology and on which switch you are receibing this message? Is this the only switch or some other switches also receive this message? Also which code you are running on this switch?
Can you try shut and no shut on this interface and see if this link stays up?
configuring no keepalive should help but this is just a workaround. you should figure out why the loopback is being detected
HTH
Narayan
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