Re: Disabling spanning tree

Tony has a good point:

from the doc CD:

"Enabling BPDU filtering on an interface is the same as disabling spanning
tree on it and can result in spanning-tree loops. "

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_see/configuration/guide/swstpopt.html#wp1046220

Nick

2009/4/16 Tony Varriale <tvarriale_at_flamboyaninc.com>

> There's a 99.999% chance this will not be the correct solution due to
> another requirement (probably in the 1st or 2nd page of the lab book).
>
>
>
> Look at my posts, look at the docs. Not sure what else to tell you guys
> and
> girls.
>
>
>
> tv
>
>
>
> From: Salah ElShekeil [mailto:salah.elshekeil_at_gmail.com]
> Sent: Thursday, April 16, 2009 3:46 PM
> To: Jonathan Greenwood II
> Cc: loopback 99; Tony Varriale; ccielab
> Subject: Re: Disabling spanning tree
>
>
>
> the question as it's I didn't change anything
>
>
>
> portfast won't disable spanning tree even with bpdufilter !
>
>
>
> but still is it right ""no switchport""?!!!! there is no way other than
> this?!!
>
> On Thu, Apr 16, 2009 at 11:32 PM, Jonathan Greenwood II <gwood83_at_gmail.com
> >
> wrote:
>
> I'm just curious to see if with it enabled on the interface if the port
> still comes up as FWD under the sh spann-tree. If it comes up as Desg/FWD
> then I would have to scratch my head, because it still says STP is
> operational based upon the port moving into the Forwarding state. Looks
> like Ryan just posted the output and it shows STP is still enabled. Any
> thoughts??? To be safe I guess I'm still going to go with "no switchport"
> Thanks Ryan for the output.
>
>
> Jonathan Greenwood II
> CCIE #22744
>
> On Thu, Apr 16, 2009 at 1:23 PM, loopback 99 <loopback99_at_gmail.com> wrote:
>
> >
> >
> > I think they are looking for BPDU Filter at the interface level. The
> Cisco
> > documentation says this about it: 'Caution Enabling BPDU filtering on
> an
> > interface is the same as disabling spanning tree on it and can result in
> > spanning-tree loops.'
> >
> > L.
> >
> >
> >
>
>
> --
>
> Jonathan Greenwood II
> CCIE #22744
>
>
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Received on Thu Apr 16 2009 - 22:11:43 ART