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STP

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Roger Richards
Occasional Advisor

STP

How to find the source of your spanning tree loop(s). What is the best methods or more efficient way to look for them.
1 REPLY
Mohieddin Kharnoub
Honored Contributor
Solution

Re: STP

Hi

You can check Topology changes in show span, see the fields:
Topology Change Count: 5 ,
Time Since Last Change : 25 minutes.

If Topology changed a lot, use:
Show Span Detail,
and look port by port, and watch the TC field for top values,
This port may cause a loop in the network, then try to disconnect it, or enable bpdu-filter.

Good Luck !!!
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