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Configure Rapid PVST become root

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  • 1.  Configure Rapid PVST become root

    Posted Oct 04, 2019 12:15 AM

    Dear All Expert

     

    I need some guidance on how to configure Rapid-PVST  become a root bridge.


    #2930F


  • 2.  RE: Configure Rapid PVST become root

    Posted Oct 04, 2019 03:45 AM
    Increase the priority for the switch that you want to become the root bridge.

    Make it so that in the L2 network ,this switch has the highest priority.



  • 3.  RE: Configure Rapid PVST become root

    Posted Oct 04, 2019 03:57 AM

    Dear Ajay Kumar Ravipati

     

    Using priority is not applicable in Rapid PVST. that why i asking

    !

    priority Set the device STP priority (the value is in range of
    0-61440 divided into steps of 4096 that are numbered
    from 0 to 15, default is step 8). Not applicable in
    RPVST mode.

     

    Please share me the actual CLI if can. as I new in Aruba.

     

     

     



  • 4.  RE: Configure Rapid PVST become root

    Posted Oct 04, 2019 04:00 AM
    What is the model and image version of the device that you are trying to configure in cli.



  • 5.  RE: Configure Rapid PVST become root

    Posted Oct 04, 2019 04:26 AM

    Dear Support 

    the switch is Aruba 2930F 

    Version: WC.16.08.0001



  • 6.  RE: Configure Rapid PVST become root
    Best Answer

    Posted Oct 04, 2019 04:57 AM
    Command : spanning-tree vlan <vid-list> priority <0...15>

    Now there are two things here,

    One is the priority and the other priority value.

    Root bridge is the one with lowest BRIDGE ID.

    Bridge id = priority (2 bytes) & Mac address (6 bytes).

    Default priority is set to 4096.

    The 0-15 is the priority value that is a multiplier to this default priority.

    So for example if you set this as 1, your priority is 1*4096.

    Now leaving it at this will make sure that for this vlan id(one vlan or multiple vlan) this switch will be selected as root bridge provided you change the priority of other switches for this vlan to a higher value (2* or 3*).

    This is a tech forum and not the official Aruba support, if you are looking for the official Aruba support, you can reach them at support.arubanetworks.com.