Lab  7.5.10 OSPF/IGRP Mutual Redistribution 

Objectives:

  • Setup mutual route redistribution between OSPF and IGRP.

Scenario: 

You have an IGRP routing domain that has been added to your OSPF. You need to advertise the IGRP routes into your OSPF network and vice versa.

Lab Task:

  1. Cable the lab and all interfaces as shown in the diagram. You will use loopbacks for the IGRP networks.

  2. Configure OSPF routing on all routers.
  3. Router-a(config)#interface loopback 1
    Router-a(config-if)#ip address 10.1.1.1 255.255.255.0
    Router-a(config-if)#interface loopback 2
    Router-a(config-if)#ip address 10.1.2.1 255.255.255.0
    Router-a(config-if)#interface loopback 3
    Router-a(config-if)#ip address 10.1.3.1 255.255.255.0
    Router-a(config-if)#router ospf 1
    Router-a(config-router)#network 192.168.8.0 0.0.3.255 area 1
    Router-a(config-router)#router igrp 10
    Router-a(config-router)#network 10.0.0.0

    Router-b(config)#router ospf 1
    Router-b(config-router)# network 192.168.12.0 0.0.3.255 area 0
    Router-b(config-router)# network 192.168.8.0 0.0.3.255 area 1

    Router-c(config)router ospf 1
    Router-c(config-router)#network 192.168.12.0 0.0.3.255 area 0

  4. Verify that OSPF is configured correctly and all OSPF routes are listed in the routing table. On Router A the 10.1.1.0-10.1.3.0 networks should be directly connected, but not listed in the routing table of the other routers.

  5. On Router A add the following commands to setup mutual redistribution between IGRP and OSPF:

    Router-a(config)router ospf 1
    Router-a(config-router)#redistribute igrp 10 metric 12 metric-type 1 subnets
    Router-a(config-router)#router igrp 10
    Router-a(config-router)#redistribute ospf 1 metric 56 100 255 10 1500
    Router-a(config-router)#default-metric 56 100 255 10 1500

  6. Issue the command show ip route from Router A and Router B. Record your results below.