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Forum Replies

  1. Hello Rene!

    Hopé you are doing great!

    Can you please Add Trouble Shooting Steps for EIGRP Neighbors Over DMVPN?

    Thanks In Advance!

    Miguel Jimenez.

  2. Hi Miguel,

    The “general” EIGRP troubleshooting lessons can also be applied to DMVPN, the only thing you need to keep in mind are the differences with the DMVPN phases.

    Have you seen my EIGRP examples for the different phases?


    Here’s what you need to keep in mind:

    • When using phase 1, all traffic goes through the hub so the next hop address doesn't matter. Just make sure that the spoke routers have a (summary) route. If you don't use summarization then you need to disable split ho
    ... Continue reading in our forum

  3. Rene,

    Am I correct in saying that you can use the neighbor command with sub-interfaces and have some of those sub-interfaces using the neighbor command with the others establishing a neighborship via normal means (i.e. dynamically discover neighbors)?

    From an article I read from Kevin Wallace, (where three routers were connected via a switch and using physical interfaces), R1 and R2 initially established a dynamic neighborship, but then when R3 was introduced and a static neighbor was configured between R2 and R3, it broke the dynamic neighborship between R1 and R2.

    Thanks in advance.

  4. Hello Andy

    Yes, it is possible to use the neighbor command with sub-interfaces. Each sub-interface is considered a separate entity when it comes to configuring EIGRP neighbors. Each sub-interface, just like the physical interfaces, can be configured to either automatically achieve neighbor relationship with an EIGRP neighbor, or achieve it manually via explicitly configuring the IP of the neighbor.

    Now in the example that you state, the situation is different. Here you have three routers connected to the same subnet. When you configure a static neighbor adj

    ... Continue reading in our forum

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