How to configure Redistribution between OSPF and RIP

In a previous lesson I explained the basics of Redistribution. Now it’s time to actually configure some redistribution. In this lesson we’ll cover redistribution between OSPF and RIP. This is the topology that we will use:

Let’s start with the redistribution between OSPF and RIP.

In a previous lesson I explained the basics of Redistribution. Now it's time to actually configure some redistribution. In this lesson we'll cover redistribution between OSPF and RIP. This is the topology that we will use: Let’s start with the redistribution between OSPF and RIP. First let me show y

First let me show you the router configurations:

R1(config)#router ospf 1
R1(config-router)#network 1.1.1.0 0.0.0.255 area 0
R1(config-router)#network 192.168.12.0 0.0.0.255 area 0

R2(config)#router ospf 1
R2(config-router)#network 192.168.12.0 0.0.0.255 area 0

R2(config)#router rip
R2(config-router)#version 2
R2(config-router)#no auto-summary 
R2(config-router)#network 192.168.23.0

R3(config)#router rip
R3(config-router)#version 2
R3(config-router)#network 3.3.3.0
R3(config-router)#network 192.168.23.0

Nothing special here, just OSPF and RIP advertising their networks.

R1#show ip route      

Gateway of last resort is not set

C    192.168.12.0/24 is directly connected, FastEthernet0/0
     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback0

R2#show ip route 

Gateway of last resort is not set

C    192.168.12.0/24 is directly connected, FastEthernet0/0
     1.0.0.0/32 is subnetted, 1 subnets
O       1.1.1.1 [110/2] via 192.168.12.1, 00:11:05, FastEthernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
R       3.3.3.0 [120/1] via 192.168.23.3, 00:00:20, FastEthernet1/0
C    192.168.23.0/24 is directly connected, FastEthernet1/0

R3#show ip route 

Gateway of last resort is not set

     3.0.0.0/24 is subnetted, 1 subnets
C       3.3.3.0 is directly connected, Loopback0
C    192.168.23.0/24 is directly connected, FastEthernet0/0

You can see router R2 has learned RIP and OSPF information. Time for some redistribution action!

Forum Replies

Hey René,
you missed something in the command syntax. After I have read your lesson, I tried the example. With the shown syntax John still doesn’t advertise the Loopback addresses and the connected network. You probably wrote it in the lesson, but I had to complete:

John(config)#router eigrp 12
John(config-router)#redistribute rip
John(config-router)#redistribute connected

John(config)#router rip
John(config-router)#redistribute eigrp 12
John(config-router)#redistribute connected

With this syntax, John started to advertise the Loopback and his directly connec

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Hi Sascha,

That’s right, this tutorial is just an overview of redistribution but I didn’t show the full config. Here’s the configuration example for those 3 routers:

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Hi Lazaros,
When we do redistribution from Eigrp to OSPF vice versa, which exactly routes are advertised, the best routes in routing table it self OR all routes of EIGRP (or OSPF) before comparing the Admin Distance between different Protocols in routing table.?

Lazaros,
Many thanks for your usual support

Hi Waleed,

That would prevent routes from looping around but it also means you have a single point of failure. Redistribution on two routers is no problem but you have to understand and deal with potential issues. For example, take a look at route tagging:

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