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 617 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)

 

376 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. 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 horizon on the hub so the spoke routers can learn each other's networks.
    • When using phase 2, there is direct spoke-to-spoke traffic so spoke routers a) need to know each others networks and b) the next hop has to be correct. This means you have to disable split horizon and disable ip next hop self on the hub.
    • When using phase 3, the spoke routers require "something" in the routing table to reach each other. It doesn't matter what the next hop is since NHRP will overwrite it. If you don't use summarization then you should disable split horizon on the hub.
     

    Hope this helps!

    Rene

Ask a question or join the discussion by visiting our Community Forum