RE: Disabling spanning tree

I know you can do it per VLAN but AFAIK not per port with a "no
spanning-tree int" like command. That's part of the tricky in the question.
Most people sitting a lab would start with:

Global config: no spanning-tree ?

Or

Interface: no spanning-tree ?

They'll come up blank for interface commands.

tv

From: Jonathan Greenwood II [mailto:gwood83_at_gmail.com]
Sent: Thursday, April 16, 2009 1:38 PM
To: Tony Varriale
Cc: ccielab
Subject: Re: Disabling spanning tree

I agree Tony. Thinking about it a little bit more there's no way you can
disable STP on a per port basis. You can disable STP on a per VLAN base but
not per port. What are you thoughts on that?

Jonathan Greenwood II
CCIE #22744

On Thu, Apr 16, 2009 at 11:32 AM, Tony Varriale <tvarriale_at_flamboyaninc.com>
wrote:

This like a lot of lab tasks are vague.

But, with portfast xyz you aren't disabling spanning tree. The question is
clear about 2 things.you have to disable spanning tree and you can't use no
spanning-tree commands. And, obviously, a switch can be connected to a port
that is in portfast.

If you read the vague part about switch or bridge as BPDUs, the answer that
meets the requirement is quite clear.

tv

From: Jonathan Greenwood II [mailto:gwood83_at_gmail.com]
Sent: Thursday, April 16, 2009 1:19 PM
To: Tony Varriale
Cc: ccielab

Subject: Re: Disabling spanning tree

I agree but key string in his question was "Assume SW2 Fa 0/15 will never
connect to a switch or bridge"

The question itself is pretty vague and would probably warrant some clarity
if the proctor where to offer. But my initial thoughts are portfast based
upon the question.

Jonathan Greenwood II
CCIE #22744

On Thu, Apr 16, 2009 at 11:12 AM, Tony Varriale <tvarriale_at_flamboyaninc.com>
wrote:

That doesn't disable spanning tree. It expedites the process.

tv

On Thu, Apr 16, 2009 at 8:43 PM, Ryan West <rwest_at_zyedge.com> wrote:

> Spanning-tree portfast is what they're asking you for. Key words are
> switch or bridge.
>
> -ryan
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Salah ElShekeil
> Sent: Thursday, April 16, 2009 1:35 PM
> To: Ryan DeBerry
> Cc: Ravi Singh; ccielab
> Subject: Re: Disabling spanning tree
>
> I have this task
>
> Assume SW2 Fa 0/15 will never connect to a switch or bridge!
>
> desable spanning tree on this interface, you may not use no spanning-tree
> commands to do this!
>
> the interface must be up !!
>
>
> !!
>
> On Thu, Apr 16, 2009 at 8:32 PM, Ryan DeBerry <rdeberry_at_gmail.com> wrote:
>
> > BPDUFILTER
> >
> > http://anetworkerblog.com/2007/08/26/bpdu-guard-and-filter/
> >
> >
> > On Thu, Apr 16, 2009 at 1:26 PM, Ravi Singh <way2ccie_at_googlemail.com
> >wrote:
> >
> >> I think disabling spanning tree is not the right term to use. You can
> >> disable the receipt of BPDUs on the interface though using bpduguard.
> >> or if you use portfast on the interface it would send the interface
> >> straight to forwarding state which can be thought of as disabling
> >> spanning-tree but actually it's not.
> >>
> >> Regards,
> >> Ravi
> >>
> >> On Thu, Apr 16, 2009 at 6:17 PM, Salah ElShekeil
> >> <salah.elshekeil_at_gmail.com> wrote:
> >> > Dear all,
> >> >
> >> >
> >> >
> >> > how to disable spanning tree on an interface without using "no
> spanning
> >> > tree" command?
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > Salah
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
<http://www.ccie.net/>
<http://www.ccie.net/>
> >> >
> >> >
> _______________________________________________________________________
> >> > Subscription information may be found at:
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> >>
> >>

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> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
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>
>

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>
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Received on Thu Apr 16 2009 - 13:45:41 ART