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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 Taslim,

    There are a couple of parameters that have to match:

    • Authentication
    • AS Number
    • K values
    • Subnet
    You can also take a look at this post where I walk you through the most common issues with the EIGRP neigbor adjacency:

    EIGRP Neighbor Adjacency Troubleshooting

    Rene

  3. 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

  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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