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Principle switch selection

  • 1.  Principle switch selection

    Posted 02-26-2015 12:41 PM

    HI All,

    I need some information about selecting principle switch in a fabric.

    1. How fabric will decide which should be the principle switch
    2. Will it consider domain id or switch WWN
    3. Does any settings co be done in a switch to consider principle switch
    4. If I change principle switch, will it affect live fabric or is an online activity


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  • 2.  Re: Principle switch selection

    Posted 02-26-2015 11:21 PM

    I need some information about selecting principle switch in a fabric.

    1. How fabric will decide which should be the principle switch 
    2. Will it consider domain id or switch WWN

        <- the switch that have lower WWN will be principle switch.


    3. Does any settings co be done in a switch to consider principle switch

        <- see the command ref manual , and see fabricprincipal.

     

    fabricPrincipal
    Sets the principal switch selection mode.
    Synopsis fabricprincipal --help|-h
    fabricprincipal [--show|-q]
    fabricprincipal --enable [-priority|-p priority] [-force|-f]
    fabricprincipal --disable
    fabricprincipal [-f] mode
    Description Use this command to set principal switch selection mode for a switch and to set priorities for
    principal switch selection.
    The implementation of the fabricPrincipal command is based solely on mechanisms specified in
    the Fibre Channel standards. These mechanisms provide a preference for a switch requesting to be
    the principal switch in a fabric, but they do not provide an absolute guarantee that a switch
    requesting to be the principal switch is granted this status.
    When dealing with large fabrics, the selection of the principal switch is less deterministic. In these
    cases, to help ensure that the desired switch is selected as the principal switch, a small cluster of
    switches should be interconnected first, followed by additional switches to enlarge the fabric.

     

     

           fabricprincipal 1 command mean that principal mode enabled.


    4. If I change principle switch, will it affect live fabric or is an online activity

       <- If disconnect the ISL after that re join the fabric, it should be change.


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