route twice

Discussion in 'Cisco' started by Nuno Cristelo, Jul 22, 2003.

  1. Hi,

    I some doubts question regarding a Cisco config.

    In the config I can see the following two lines:

    ip route
    ip route

    I know that these addresses are active in two interfaces. We had a 2Mbit
    connection that was upgraded to 4 Mbit. Our ISP told us to add the routes
    and that with those two routes we would be able to use the two links as one.
    Is this true with Cisco's CEF?

    My question is:
    1. what's the route selected by the packets?


    Nuno Cristelo, Jul 22, 2003
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  2. Nuno Cristelo

    PJML Guest

    Do a "show IP route" and see what the metrics assigned to
    the two default-routes come out as. If they are defaulting
    to identical values, then in the absence of any other
    instructions, it should load-balance outbound packets
    across the two interfaces.

    [note I say "should", as there is always the possibility
    that the routing-metrics are actually being defined by
    a dynamic routing-protocol as well as the above route-
    statements, in which case you need to see what the
    actual metrics are once the static and dynamic routes
    are aggregated].
    PJML, Jul 22, 2003
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  3. Nuno Cristelo

    SkyFoxXP Guest

    Note that in order to have an effective load-balancing, you *must* disable
    "route-cache" and "ip route-cache" on both interfaces!


    SkyFoxXP, Jul 22, 2003
  4. Nuno Cristelo

    Hansang Bae Guest

    Unless you use CEF per-packet load balancing.



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    Hansang Bae, Jul 22, 2003
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