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  • Updated 10 months ago

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
   -                                        -
       -                                 -
            -                         -

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?


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Posted 10 months ago

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Eric Pulvino, Official Rep

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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.