[c-nsp] err-disable (Loopback test)

[sthaug at nethelp.no]

> We recently had a port on a C2950 go into the err-disable state for
> failing the loopback test. Adding 'errdisable recovery cause loopback'
> caused the switch to re-enable the port after a 300 second timer had
> elasped.
> 
> But I'm curious - what is the loopback test that the port failed? It only
> occured the once. Google failed to turn up any real answers.

Check out the following messages for some thoughts on this subject:

<http://groups.google.com/groups?safe=images&ie=UTF-8&as_umsgid=%3Cbrkhv0.qmc.1@verdi.nethelp.no%3E&lr=&hl=en>

<http://groups.google.com/groups?safe=images&ie=UTF-8&as_umsgid=%3Cbmn1cm.1m5j.1@verdi.nethelp.no%3E&lr=&hl=en>

Steinar Haug, Nethelp consulting, sthaug at nethelp.no