We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is Why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 618 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)

 

408 New Members signed up the last 30 days!

satisfaction-guaranteed

100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!


Forum Replies

  1. Hi ,
    I did not understand this
    “As soon as router John receives the hello packet from Jack it will respond by sending update packets that contain all the routing information that it has in its routing table. The only routes that are not sent on this interface are the one that John learned on this interface because of split-horizon”

    router will send an UPDATE without forming a neighbor relationship??
    Jack has not shared any update to john, then how john will come to know the prefix of jack so there is no point of split horizon here.
    please correct me if am wrong…

  2. 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 ?

  3. 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

  4. 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

15 more replies! Ask a question or join the discussion by visiting our Community Forum