Migrating RIP to IGRP

Migrating RIP to IGRP

7.3.6 This page will teach students how to convert a router from RIP to IGRP.

When Cisco created IGRP in the early 1980s, it was the first company to solve the problems associated with the use of RIP to route datagrams between interior routers. IGRP examines the bandwidth and delay of the networks between routers to determine the best path through an internetwork. IGRP converges faster than RIP. This prevents routing loops that are caused by disagreement over the next routing hop. Further, IGRP does not share the hop count limitation of RIP. As a result of this and other improvements over RIP, IGRP enabled many large, complex, topologically diverse internetworks to be deployed.

Use the following steps to convert from RIP to IGRP:

1. Enter show ip route to verify that RIP is the routing protocol on the routers to be converted.

2. Configure IGRP on Router A and Router B.

3. Enter show ip protocols on Router A and Router B.
4. Enter show ip route on Router A and Router B.

The Lab Activities will show students how to configure a default route, use RIP to propagate the information, and then convert the router to IGRP.

The next page will explain how to verify that IGRP has been configured properly