In this blog I will show the basics of redistribution of 2 different routing protocols. Why do we have to redistribute 2 different protocols? Enterprise networks are sometimes combined with different network departments with different ideas on network design and different goals in mind, and different skill sets. For whatever reason as a network engineer you may come into a challenge of providing end to end connectivity between two different routing protocols. You may not have the luxury of reconfiguring the whole network to one standard routing protocol. This blog will help you get started.
In this packet tracer lab below there are 2 different networks. One is configured with EIGRP and one with OSPF. They are completely isolated and have no connectivity.
In this lab below we have made the first step which is to physically connect the two networks. The two “perimeter” routers are addressed with a separate /30 subnet. The subnet is advertised in their own local routing protocol.
LEFT#sh run | s r e
router eigrp 1
redistribute ospf 1 metric 1000 100 255 1 1500
network 172.16.0.0 0.0.0.3
LEFT#sh run | s r o
router ospf 1
router-id 10.0.0.1
log-adjacency-changes
redistribute eigrp 1 subnets
LEFT#
Ken Hagen CCIE #56460 