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

475 Sign Ups in the last 30 days

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

Tags: ,

Forum Replies

  1. why would u need to run more than 1 routing protocol in your network. wouldn’t you either run in todays world purely eigrp or ospf? why both?

  2. Hi Ruby,

    If you design a network, you will always use one routing protocol (if possible). Here are some scenarios where you might have to use two routing protocols:

    • You are migrating your company network with the network from another company. Maybe you are running OSPF and they are running EIGRP. As a temporary solution you could use redistribution and run both protocols.
    • You run OSPF on your internal network and are installing a new site. Your SP offers you a MPLS VPN connection but only supports BGP as the routing protocol.
    • You use EIGRP on your network b
    ... Continue reading in our forum

  3. Thanks Laz, it kind of helps by giving me a basic concept.

  4. I would add when it comes to more specific routes, for example a router learns from OSPF (AD 110) and from RIP (AD 120), the router will choose the more specific route, so the RIP one, despite it has a higher (worse) AD .
    So, if we want to reach the host from this router, it will use the /25 route from RIP.

  5. Hello Juan,

    The key thing to remember is that AD only applies when you have two exact routes. and are not the same routes.


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