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Forum Replies

  1. Hhhm, so the routers don’t care if they are not on the same subnet?

  2. Hi Francesco,

    It’s strange but that’s correct. In my example above it works with EIGRP, it also works with OSPF.

    You have to use ip unnumbered on both sides though, otherwise you won’t get an adjacency.

    Rene

  3. you don’t need to use IP unnumbered on both ends. The one without IP unnumbered will still check for valid subnet. IP unnumbered just disables it.

  4. Hi Rene,
    My question is
    If R1 Serial Interface is configured for ip unumbered and R2 Serial interface is not configured for ip unumbered but instead it is configured for some different subnet, will that work??

  5. How does IP un-numbered work from an L2 perspective? Each interface on the serial will answer ARP?

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