IRB and station blocks

Discussion in 'Cisco' started by pfisterfarm, Feb 9, 2011.

  1. pfisterfarm

    pfisterfarm Guest

    We're in the middle of a project involving a server at each of several
    remote sites that is being virtualized at a central location. The
    virtual machine at the central location is in the same vlan as the
    remote site. The network looks something like:

    (remote side) 4506 -> AT&T CSME -> 4507R (central side) -> 8540 (set
    up for IRB) -> 3550 -> vmware servers

    Right now, mac addresses are being passed from the remote site
    straight through to the 3550 where the vmware servers are. I'm
    starting to wonder about capacity issues along the way. For example,
    the 8540 in "show bridge" says "2730 station blocks, 452 free".

    - Does that mean the 8540 can only learn 2730 mac addresses? It seems
    to go down every time more addresses are learned.
    - Is there an alternative to sending large quantities of mac addresses
    around? Some sort of tunnel from the remote 4506 to the 3550 on the
    central side? We wouldn't want to send all traffic from the remote
    site, just the traffic to and from the server.
    pfisterfarm, Feb 9, 2011
    #1
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