There is no way short of disabling spanning-tree.

On Sat, Jun 18, 2011 at 10:02 AM, Mark Beynon <[email protected]> wrote:
> Any one got any idea how to stop a switch ever becoming root. Obviously you 
> can demote it's priority, and raise everyone else's, but this wouldn't stop 
> it if all switches were removed and the one remaining switch had the same 
> priority. Then we would be down to the chance of mac addresses.
>
> Is there another way? Cant really turn of spanning-tree, and any filtering 
> would just allow this switch to become root even though others may not know 
> it.
>
> I thought about EEM, but the best I coup cone up with was shutting down links 
> if no better bpdu was received. They wouldn't recover though so not suitable.
>
> I thought about trying loop guard on all switch links. This would take the 
> switch link down if it stopes receiving the bpdu's, but wouldn't stop my 
> switch becoming the root if it had equal priority. Wasn't quite sure what 
> would happen if the switch became root.. It's peers would stop sending bpdu's 
> to it so maybe the links would err-disable..
>
> Any ideas?
>
> Sent from my iPhone
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