Redistribution between EIGRP and RIP

In previous lessons I explained the basics of redistribution and I also showed you how to configure redistribution between OSPF and RIP. This time we’ll take a look at redistribution between EIGRP and RIP. Let’s take a look at the topology that we will use:

EIGRP RIP Redistribution R1 R2 R3

Above we have 3 routers. Router R1 and R2 are configured for EIGRP. R2 and R3 are both configured for RIP.

First we will configure EIGRP and RIP without any redistribution:

R1(config)#router eigrp 12
R1(config-router)#no auto-summary 
R2(config)#router eigrp 12
R2(config-router)#no auto-summary 
R2(config)#router rip
R2(config-router)#no auto-summary 
R2(config-router)#version 2
R3(config)#router rip
R3(config-router)#version 2
R3(config-router)#no auto-summary

Above are the router configurations I’ve used, nothing special…redistribution doesn’t happen automatically this is something we have to do ourselves. Let’s configure it:

R2(config)#router eigrp 12
R2(config-router)#redistribute rip metric 1500 100 255 1 1500

I’m redistributing RIP into EIGRP and I have to specify the metrics. Pick whatever values you like. In you don’t specify the seed metric than the default one will be infinity and your redistributed routes don’t show up!

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Forum Replies

  1. In my example there is only 1 router that is running EIGRP and RIP at the same time. When you have two routers doing redistribution, it is possible that you get a scenario like this:

    Prefix from routing protocol A > B > A

    This is a problem that can cause routing loops or sub-optimal routing. Imagine that we have prefix in EIGRP, by default it has a AD of 90.

    Once it is redistributed into RIP, it has an AD of 120.

    When we redistribute it back into EIGRP, the AD is 170 (external).

    Since 170 (external) is higher than 90 (internal), EIGRP will never

    ... Continue reading in our forum

  2. Hello Wisam

    In general, the default values of the K metrics should not be changed. They are configured so that EIGRP will function correctly under the most common circumstances. However, if there is strange behaviour on your network or if you want to configure an elaborate routing behaviour, then K1 as well as the rest of the K values can be adjusted.

    K1 can be set to anything between 0 and 256 (yes, 256, not 255) as can all of the K values. Specifically, K1 involves taking into account the minimum configured bandwidth between the router in question and the

    ... Continue reading in our forum

  3. Hello Laz,

    I have 3 routers R1,R2 and R3.
    R2 has 2 vrfs. vrf1 and vrf2.

    Interface on R2, which is connected with R1, is in vrf1.
    Interface on R2, which is connected with R3, is in vrf2.

    And R2 has the following eigrp configuration.

    router eigrp 10
     address-family ipv4 vrf vrf1 autonomous-system 1
      redistribute eigrp 2 metric 1000000 100 0 1 1500
     address-family ipv4 vrf vrf2 autonomous-system 2

    I am expecting routes

    ... Continue reading in our forum

  4. Hello Sachin,
    in your lab redistribution does not work because you are trying to redistribute between different VRFs. If you want redistribution to take place, then routes have to be in same VRF.

    If you want to redistribute between VRFs it is called route leaking and you can learn it in this lesson.

    You can achieve route leaking by using static routes or MP-BGP VPNv4 address-family.

    To make you lab work you can apply a bit of configuration on R2.

    Create VRFs and configure Route Distinguishers (RD) and Route

    ... Continue reading in our forum

  5. Great answer Laz. I guess it makes sense that the two K values used by default are listed first and second.

    It’s interesting to learn about the logic that goes into the design of the software…

    Much appreciated!

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