From: Marek Osuch (mosuch@xxxxxxxxxxxxxx)
Date: Sun Jul 07 2002 - 06:54:20 GMT-3
Yes, but condition was "never become root":)
In case where this switch is only one for this vlan (for example this vlan
isn't used by routers), solution is disabling spt for this vlan
Marek
#9498
----- Original Message -----
From: "Colin Barber" <Colin.Barber@telewest.co.uk>
To: <ccielab@groupstudy.com>
Sent: Sunday, July 07, 2002 11:43 AM
Subject: RE: Root bridge question
> If the switch is the only device in the vlan it doesn't matter what the
> priority is - it will always become the root.
>
> However it's not just switches that run spanning tree, what about any
> routers connected to the switch with bridging enabled?
>
> Colin.
>
> -----Original Message-----
> From: Marek Osuch [mailto:mosuch@betacom.com.pl]
> Sent: 07 July 2002 10:11
> To: Manny Gonzalez; ccielab@groupstudy.com
> Subject: Re: Root bridge question
>
>
> Simple question:
> what's happend if switch with highest priority (65535) is only one switch
in
> vlan?
> It will always be root..:)
>
> Best regards
>
> Marek
> #9498
>
> ----- Original Message -----
> From: "Manny Gonzalez" <manny@nyp.org>
> To: <ccielab@groupstudy.com>
> Sent: Sunday, July 07, 2002 5:23 AM
> Subject: Re: Root bridge question
>
>
> > None of the solutions for HARD questions relating to Spanning Tree are
> digestible:
> >
> > Q. Make Sure Switch is always the root.
> >
> > A. Well, not really doable. Placing the priority at ZERO can still be
> overridden
> > by a bridge with a lower ID :-)
> >
> > Q. Make sure bridge is NEVER the root.
> >
> > A. Well, the sure way is to disable Spanning Tree. You can always become
> root
> > with PRIORITY 65535 if there is someone with that priority and a HIGHER
ID
> on
> > the bridge.
> >
> > So yes, none are easy. However, my suggestion is, "don't go reading too
> much
> > into a question" This is good advice given to me and I applied in the
lab
> when I
> > took it. Actually, I have known many people who have failed the lab
> because they
> > overanalyzed questions, NOT because they did not know the right answer.
> >
> > Bottom line is, if I was asked to make sure a bridge never becomes root,
I
> will
> > probably make it 65535 instead of turning off STP. Turning it off may be
> too
> > harsh because you are making it worse by not being able to prevent
loops.
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