7.6 RIP and OSPF Redistribution
7.6.2 Adding OSPF to the center of a RIP network
A common first step in converting a RIP network to an OSPF network is to add backbone routers that run both RIP and OSPF, while the remaining network devices run RIP. These backbone routers are OSPF ASBRs. Each ASBR controls the flow of routing information between OSPF and RIP. In the main figure Router A is configured as the ASBR.

Configuration File Examples

The commands in the configuration file for Router A determine the IP address for each interface and enable RIP on those interfaces. (see RouterA#show running-config command output).

The following commands in the configuration file for Router B determine the IP address for each interface and enable RIP on those interfaces. (see RouterB#show running-config command output).

The following commands in the configuration file for Router C determine the IP address for each interface and enable RIP on those interfaces. (see RouterC#show running-config command output).