OSPF External Routes Configuration

As you know External Routes are the routes that provide connection to the other networks working with different IGP. Here, we are talking about OSPF and the networks routed by another routing protocol will be External for us.

In this post, we will use the below topology. We will have only oe External network and this will be EIGRP network. The routes to that network will be External routes.

Yoıu can DOWNLOAD the Packet Tracer example with .pkt format HERE.

Here, we will bypass the interface configurations and the OSPF configuration. Because in the previous article, we had configured them. Here, the main points will be the exceptional EIGRP configuration. Think about, all the interface and OSPF configuration is done.

We will also make Redistribution configurations from OSPF to EIGRP and from EIGRP to OSPF. Redistribution lesson is another big lesson. So we will talk about them detailly later.

Let’s check the EIGRP, OSPF and Redistribution configurations on Router5 and Router6.
Router5

Router5(config)# router eigrp 1
Router5(config-router)# redistribute ospf 1 metric 150 10 200 200 1500 
Router5(config-router)# network 10.5.0.0 0.0.0.255
Router5(config-router)# no auto-summary
Router5(config-router)# exit

Router5(config)# router ospf 1
Router5(config-router)# router-id 5.5.5.5
Router5(config-router)# log-adjacency-changes
Router5(config-router)# redistribute eigrp 1 metric 100 subnets 
Router5(config-router)# network 10.4.0.0 0.0.0.255 area 2
Router5(config-router)# default-information originate