which version of spanning tree?

alliasneo

Hey guys, how do I tell which version I'm running on my switches?

I was just going to change over to RSTP and I suddenly thought, 'hang on, if I was coming in on site how would I check to see what they are running?'

thanks

networker050184

Do a "show spanning-tree summary" and it will say "Switch is in blah mode".

Monkerz

show spanning-tree summary

-or-

show run | inc spanning-tree mode

EDIT: Networker beat me to it...but, if you use show run output and one switch in your Rapid-PVST domain is using PVST, all will run PVST from what I understand.

alliasneo

cool thanks very much - will try this command out