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Forum Replies

  1. Hello,

    thank you for this lesson, and It very helpfull.
    on the start of config on router 1, I think there is one mistake.

    R1(config)#router eigrp 123 (router ei 12).

  2. I am curious…what is the difference in using stub and passive-interface for EIGRP? Having a bit of trouble wrapping my mind around separating these 2.


  3. Hi Rob,

    There’s a big difference between the two. An EIGRP router that is configured as a stub does not receive queries when one of its neighbors loses a network.

    Passive-interface is about sending hello packets on an interface. Normally when you use the network command to advertise something then it does two things:

    1. It advertises all networks that fall within the range of your network commmand on all active interfaces.
    2. It sends hello packets on all active interfaces that have networks that fall within the range of your network command.

    When you enable passiv

    ... Continue reading in our forum

  4. Hello Azm

    R2 will query R1 to find an alternate route to R1 will not query any routers because it is not connected to any. Queries will not be sent back to the original router from which it was received, so R1 will not “re-query” R2. R1 will only send queries IF one of it

    ... Continue reading in our forum

  5. Hello Hussein

    There are several specialised cases where the receive-only option is useful. Some of these include:

    1. When applying it to a dual homed stub router with more than one connection to the same EIGRP AS. In a Dual-homed scenario “receive-only” would prevent the stub router from becoming a transit router incase of link failure in your core and still have redundancy from the stubs perspective.
    2. When using a route server connected to an eBGP network
    3. When using DMVPN spokes.

    I hope this has been helpful!


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