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glmrenard

glmrenard

Technical User
Oct 29, 2002
52
FR
Hello, I have a problem on a 3550, when I want't to bring up an interface I get :

Can't be brought up because it failed POST in loopback test

So what can I do ?

Thanks in advance !
 
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The only thing you can do is call Cisco TAC or not use the interface.

If you console in and watch the messages as the switch boots up, you will see the error as to why the switch has determined that the interface is toast.
 
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Thanks,

I reloaded the switch and all seems perfect but.. until when ?
 
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