From: Chris Butler (butlerc@xxxxxxxxxxxxxx)
Date: Thu Aug 29 2002 - 03:13:41 GMT-3
David,
You got it right in the first one. The higher the priority, the less
likely that a switch will become the root bridge. The best way to avoid
beoming root bridge, ie...you are still running spanning tree, is to make
the priority has high as possible. In this case 65535.
The opposite would be the case if you wanted to control the spanning tree
root election. The root command never did work very successfully in the
5000 series, so the best way to control root election is to make him 8192,
and your back up 16384. The remaining switches can just stay at the
default of 32768.
Good job,...don't doubt yourself next time...
Chris
> Hi,
>
> Please help me with the answer for this question: Ensure that a
> Catalyst 5000 switch never becomes the root bridge for a given vlan.
>
> I see two possible answers because I find the question ambiguous. Does
> it mean 'the vlan can still run spanning tree without ever becoming the
> root', or 'the vlan does will no longer run spanning tree'?
>
> 1. Set the spantree bridge-priority for the vlan to the highest
> possible value.
> !
> set spantree priority 65535 <vlan#>
> !
>
> 2. Disable spantree altogether for the vlan.
> !
> set spantree disable <vlan#>
> !
>
> Thanks.
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