network loop

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Aug 21st, 2007
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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.

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MUHAMMAD SHAHEEN Tue, 08/21/2007 - 00:44
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We need a lot more info to make any suggestions.

Can you attach a diagram and what kind of links/protocols and hardware are involved.


chandrakant_salunkhe Tue, 08/21/2007 - 01:58
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I am receiving following status on uplink port

Line protocol down (err-disabled)

Port goes to error disable state due to loopback.

ankbhasi Tue, 08/21/2007 - 02:07
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Hi Chandrakant,

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?




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