[c-nsp] *** GMX Spamverdacht *** Re: Weird problem with 2960S and desktop switch

[Mark Tinka]

On Wednesday, January 08, 2014 11:14:30 AM Garry wrote:

> Apart from the fact that the default BPDU guard does as
> it is supposed to, my actual problem is why the switch
> goes down when I remove it on that port, thus allowing
> the switch to be connected ... I reckon I might have to
> go on site and check on the console when the switch is
> connected (and BPDU guard disabled) to find out whether
> there are any hints as to what is going wrong ...

Could be a bug.

A software upgrade and re-testing would be useful.

I generally enable fast convergence on all Edge ports 
(PortFast) globally, but disable it when connecting to known 
downstream 802.1Q-enabled switches.

We've had cases where customers have connected switches to 
us without our knowledge, and because customers generally 
connect to Edge ports, they can hit BPDU guards. Getting 
them to fix this (forever) always works/helps.

This could get more interesting as customer hand-offs rely 
more on EVC's.

Mark.
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