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VSF behavior - 2930F - Daisy chain - Center switch fails

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  • 1.  VSF behavior - 2930F - Daisy chain - Center switch fails

    Posted Aug 03, 2017 05:27 AM

    Hi all,

     

    I'm designing a network for one of my customer and wondering what teh behavior of VSF switches would be in a particular situation :

    - 2 "core" 5406R in a VSF stack

    - 3 "access" 2930F in a VSF stack, daisy chain topology

    - the 2930F at one end of the access stack is uplinked to the first 5406R and the 2930F at the other end to the second 5406R

    --> What happens if the center 2930F fails ?

    - Does LLDP-MAD deactivates one of the two last 2930F alive ?

    - Or is it possible to have an intentional split-brain scenario as long as the two 2930F are not connected directly through the stack anymore ?

     

    I know the question is disturbing, but it could help me solve issues with fiber topology and distances... (not able to loop the stack due to distances).

     

    Regards,

     

    Nicolas



  • 2.  RE: VSF behavior - 2930F - Daisy chain - Center switch fails

    Posted Aug 07, 2017 08:12 AM

    First a question: since LLDP MAD method requires a peer switch (the so called "assist" device), which switch is actually your MAD peer?

    For sure a VSF Stack made of three Aruba 2930F connected using Chain Topology will cause a Stack split once a VSF link goes down.



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