How to configure 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.

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: Above we have 3 routers. Router R1 and R2


First we will configure EIGRP and RIP without any redistribution:

R1(config)#router eigrp 12
R1(config-router)#no auto-summary 
R1(config-router)#network 1.1.1.0 0.0.0.255
R1(config-router)#network 192.168.12.0
R2(config)#router eigrp 12
R2(config-router)#no auto-summary 
R2(config-router)#network 192.168.12.0
R2(config)#router rip
R2(config-router)#no auto-summary 
R2(config-router)#version 2
R2(config-router)#network 192.168.23.0
R3(config)#router rip
R3(config-router)#version 2
R3(config-router)#no auto-summary
R3(config-router)#network 192.168.23.0
R3(config-router)#network 3.3.3.0

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. Ahh! This is simply awesome Rene.
    I have come across your lessons. They are so easy to understand. Keep it up.

  2. 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 192.168.1.0/24 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

  3. Hi Deepak,

    You can set a default seed metric globally with the “default-metric” command. That’s what I used for RIP in that example.

    It’s also possible to specify the seed metric when redistributing. For example:

    R1(config)#router rip
    R1(config-router)#redistribute ospf 1 metric 5
    

    This will accomplish the same thing.

    Rene

  4. 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

  5. Hello Giovanni,

    I think this is a cosmetic thing. They probably use the same “default-metric” command for all routing protocols.

    R1(config)#router rip
    R1(config-router)#default-metric ?
      <1-4294967295>  Default metric

    It seems they changed this in NX-OS where you can oonly configure a value between 1 and 15.

    Rene

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