redudant L2/3 design and multiple hsrp standby interfaces

Discussion in 'Cisco' started by lfnetworking, May 20, 2005.

  1. lfnetworking

    lfnetworking Guest

    Topology: two access switches, which presently are not trunked, and two
    access routers, each cross-connected, trunking dot1q vlans, to both
    switches. Pix fo pair, one pix connected to each switch.

    So at any one time, one pix is active through one switch. It seems,
    that the ultimate redundancy would be derived by having a routable
    subinterface on each of the two router-switch trunks - i.e. two
    interfaces for each vlan on each router one connected to each switch.

    If you have only one of the trunks carrying traffic on each router,
    e.g,accessrouter1-accessswitch2, accessrouter2-accessswitch1 if one
    switchand the router it's connected to for the given route fails, there
    is no path for the client.

    Can you have more than two routable interfaces as members of the same
    standby group, and if so, is it advisable and what are the pitfalls?
    Is the hsrp part as straightforward as just giving each interface a
    different priority, say 100, 105, 110, 115? I know there are other
    issues that may crop up with the L2 part, regarding the interaction of
    spanning-tree and hsrpconvergence as well.

    thanks
    lfnetworking, May 20, 2005
    #1
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