From: Colin Barber (Colin.Barber@xxxxxxxxxxxxxx)
Date: Sun Jul 07 2002 - 06:43:37 GMT-3
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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