spanning tree protocol

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05-18-2011 06:15 AM - edited 03-06-2019 05:07 PM
Hye To All,
In the attached Set-Up, the link that contains the CE500 is meant to be the main link and the other the back up link. To make this possible, i configured the switches as shown on the Set-Up but notwithstanding, it's the back-up link that's the main link. Can someone help me out on this issue?
Thanks for your help in advance.
Julie
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05-18-2011 06:51 AM
Hello Julie,
it all depends on the root bridge position,
you need to understand who is the root bridge this can give you an explanation of why the link you would like to be blocked is in forwarding state
on catalyst you can use
show spanniing-tree commands to identify the root bridge
Hope to help
Giuseppe
edit:
the show command is
show spanning-tree
