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Forum Replies

  1. Hi Rene,

    On below config advertisement

    John(config)#router eigrp 1
    John(config-router)#no auto-summary 
    John(config-router)#network 2.2.2.0 0.0.0.255
    John(config-router)#network 192.168.12.0
    John(config-router)#exit
    

    if i add below config on it

    John(config)#router eigrp 1
    John(config-router)#passive-interface loopback 0
    

    That means traffic for network 2.2.2.0/24 and 192.168.12.0 won’t pass on interface loop back 0 ?

  2. Hi @wisamani,

    If you don’t supply a wildcard then EIGRP will assume you want the whole network to be advertised. Here’s an example:

    Router(config)#router eigrp 1
    Router(config-router)#no auto-summary 
    Router(config-router)#network 1.1.1.0
    

    This is what is stored in the running config:

    Router#show run | begin router eigrp
    router eigrp 1
     network 1.0.0.0
    

    1.1.1.0 falls under the class A 1.0.0.0/8 range so that’s what EIGRP adds to the running config. If you don’t want this, you have to add a wildcard:

    Router(config)#router eigrp 1
    Router(config-router)#no network
    ... Continue reading in our forum

  3. Hi community,

    I found out something interesting in cloudshark and I even saw this in my GNS3 Lab I did when I traced neighbor adjacency.

    //cdn-forum.networklessons.com/uploads/default/original/2X/b/b90bdb68e77b9105ecd471facf720c9fce3e840b.png


    Seems like that the initial Update Packet is Unicasted to it’s Neighbor after receiving a Hello Packet but that Update at that time doesn’t contain any Network Information, only a Flag is set (Init Flag).

    //cdn-forum.networklessons.com/uploads/default/original/2X/c/ce42f673625c8371f547c946ac2ee7f2b0bcd194.png


    The receiver ... Continue reading in our forum

  4. Hello Marcel

    It’s great to see that you’re looking at the operation of EIGRP in such detail, it helps to learn more about the protocol’s operation!

    What EIGRP will do is it will initially send an empty update during the neighbor establ

    ... Continue reading in our forum

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