RE: Cisco VSS-1440 migration query

From: Jason Giles (no email)
Date: Mon Oct 19 2009 - 13:06:16 EDT

  • Next message: Michael J McCafferty: "NetFlow analyzer software"

    >From my test, all physical interfaces configs on switch 2 are factory defaulted and SVI interfaces deleted on switch 2 upon running the conversion commands.

    Switch 1 is intact with the new naming convention as well as SVI's.

    I cannot comment on glbp as I do not run it.

    /Jason

    -----Original Message-----
    From: Leland Vandervort [mailto:]
    Sent: Monday, October 19, 2009 11:07 AM
    To:
    Subject: Cisco VSS-1440 migration query

    Hi All,

    Trying to find an answer to a single technical point concerning a
    migration of a fleet of Catalyst 6500's to VSS-1440.

    I've had a scan through the documentation on CCO (whitepapers, config
    guides, migration guides, etc.) but cannot find anything dealing with
    this one specific point.

    Background:

    Assume that on both stand-alone chassis, you have a specific vlan
    interface with L3 configuration, such as:

    switch1:

     vlan 10
      name testing
     !
     interface vlan10
      ip address 10.100.100.1 255.255.255.0
      glbp 1 ip 10.100.100.254
      glbp 1 preempt
      glbp 1 load-balancing round-robin
     !

    switch2:
      vlan 10
       name testing
      !
      interface vlan10
       ip address 10.100.100.2 255.255.255.0
       glbp 1 ip 10.100.100.254
       glbp 1 preempt
       glbp 1 load-balancing round-robin
      !

    Once switch 1 is converted to VSS mode and is brought up as
    ACTIVE/MASTER, it will keep it's layer3 configuration on the VLAN
    interface.

    The question is what happens to the L3 configuration on switch2 when it
    comes up in STANDBY/SLAVE?

    I can foresee one of two possibilities, but not sure which to expect
    before trying to do this in a live enviroment:

    either:

     1. switch2 will boot up straight into NSF/SSO, inheriting its [new L3]
    configuration from the active master, overwriting the pre-VSS L3
    configuration. (would be preferable).

    or

     2. switch2 will boot up and enter RPR mode with incompatible
    configuration for the interface, forcing me to have to manually remove
    the L3 configuration from the interface before I can proceed with the
    migration. (not really ideal with hundreds of vlans on these things...)

    Any idea which one of these would be the case ?

    (the glbp will be retained, as it will be running between two VSS pairs
    with 10G trunks between them).

    Thanks in advance

    Leland


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