01-16-2003 11:53 AM - edited 03-02-2019 04:15 AM
What is the best way to track down the designated root bridge in a mult-switch environment??
01-16-2003 12:01 PM
Spanning tree is always per VLAN. If all your switches are CAT OS based, do a sh spantree
http://www.cisco.com/warp/public/473/5.html
Switch-15> (enable) sh spantree 1
VLAN 1
spanning-tree enabled
spanning-tree type ieee
Designated Root 00-10-0d-b1-78-00 <<<-------
!-- MAC address of the root switch for VLAN 1.
Designated Root Priority 8192
Designated Root Cost 0
Designated Root Port 1/1 ,<<<<<<<<<----
01-16-2003 12:21 PM
A little more help here if you don't mind!
In your example
the Root Priority in 8192
Designated Root cost is 0
but the Designated root port is 1/1.
Does this mean this is not the Root bridge because the port is not 1/0??
Thanks for the clarification!!
01-16-2003 12:23 PM
I just tweaked the root port in the example to illustrate better:)(but I guess I did not). It was indeed the root brige in my example
01-16-2003 02:27 PM
Thanks for the clarification. I appreciate the help!!!!
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: