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  • 1.  cisco pvst

    Posted Nov 24, 2010 05:08 PM

    we have just purchased some hp 3500yl switches. Currently we have cisco 2960/2950 switchs.

    I would like to hub-spoke the cisco to the hp 3500.

    With regards to spanning-tree. Most of the cisco switches support a pre-standerd of mstp. Is it possible to use rapid-pvst on the cisco side and mstp on the hp side?

     

     

    jason



  • 2.  RE: cisco pvst

    Posted Nov 26, 2010 07:55 PM

     

    If you will have redundant layer 2 paths in your network,  I think your only spanning tree option in

    an HP/Cisco environment is MSTP.

     

      http://cdn.procurve.com/training/Manuals/ProCurve-and-Cisco-STP-Interoperability.pdf

     

    If you are not designing for redundancy, but rather just using spanning tree to block

    accidental loops, then PVST on the Cisco's, and STP on the HPs seems to work adequately

    for that.

     

     



  • 3.  RE: cisco pvst

    Posted Nov 29, 2010 08:52 AM

    Hi,

     

    Regarding your product :

    - HP E3500 : MSTP without instance (Only CIST, or instance 0) configure as root (priority 0)

    - Cisco 2960 : MSTP without instance (Only CIST, or instance 0) configure as non-root (priority 16384)

    - Cisco 2950 : Rapid-PVST configure as non-root (priority 16384)

     

    For MST switchs you need to configure a region name and a revision id identical for all devices. Use the latest IOS for Cisco switchs to be sure that MSTP is not implemented in its pre-standard state but full IEEE.

     

    Bye,