Migrating from supervisor engine 1a to supervisor 2, pfc2, msfc2. Any tips ?

Discussion in 'Cisco' started by acdsp, Jan 21, 2007.

  1. acdsp

    acdsp Guest

    Hello all,

    We've been running 2 6500, supervisor 1a/pfc/msfc for some years and as
    the network have grown, we bought 4 supervisor II, pfc2, msfc2 (no
    budget for Sup720 for now). I'm looking for hear from people who made
    this conversion for any tips they have.

    The first difference we've found is the limitation in the number of
    HSRP groups (256 in Supervisor 1 and 16 in supervisor 2, sigh!).

    If there are some thoughts, reports, regrets :), etc, I will be glad
    to hear from you.

    Thank you.
    acdsp, Jan 21, 2007
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  2. acdsp

    Bod43 Guest

    Hmmm. 16 system wide unique HSRP groups hardly seems like a
    limitation to me.

    It does prevent you from doing

    int x
    ip 10.1.x.1 /24
    stand x whatever

    repeat for x = 1 to 255.

    However this is a convention that does not produce any
    network functional benefit.

    There is nothing to prevent you from using the same standby group(s) on
    interface. I have seen cases where two groups were used
    on each interface for load balancing but never more.

    int x
    ip 10.1.x.1 /24
    stand 1 ......
    stand 2 .....

    repeat for x - 1 to 255

    Anyway for a full explanation see:-


    Cisco hardly ever do anything that prevents customers from delivering
    effective networks. Really, it's very rare which is why I knew to look
    it up.
    Bod43, Jan 21, 2007
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  3. acdsp

    stephen Guest

    you dont mention whether you are running CatOS /IOS or an integrated

    16 group addresses or possibly some other limit (i think - a long time
    ago) - but you can reuse them within different subnets....
    MSFC / PFC IP doesnt use route caching, so better performance than a Sup 1A
    for some forwarding, and some better hardware assist.

    sup1a EOL - note near the end on trade ins....

    Cat6k stuff

    best practice bit (CatOS - there is a similar one for IOS somewhere on

    AFAIR better QoS as well, depending on s/w, line cards etc......
    stephen, Jan 23, 2007
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