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Userlevel 1
It looks as though I may be having a problem with STP on the Cumulus switches.
DistA is root and DistB is backup. With a sustained ping running (from DistA to AccessC), I disabled the link between DistA and AccessC. I lost one ping initially, and the route via DistB kicked in. However, it worked for about a minute, but then timed out.
Is there some sort of timer that needs to be manipulated?
All three switches in the above scenario described are Cumulus switches.
DistA =========== DistB
- -
- -
- -
-AccessC-

However, I substituted AccessC with a different 3rd party open OS (Linux-based) running MST, and the failover worked fine with the Cumulus distribution switches.
Any thoughts?
Thanks.

1 reply

Userlevel 4
None. Probably makes sense to look at "arp -a" , "bridge fdb show" on access C before and during the failed state to inform any other suggestions.

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