RIPandOSPFRedistribution.docVIP

RIP and OSPF Redistribution This case study addresses the issue of integrating Routing Information Protocol (RIP) networks with Open Shortest Path First (OSPF) networks. Most OSPF networks also use RIP to communicate with hosts or to communicate with portions of the internetwork that do not use OSPF. Cisco supports both the RIP and OSPF protocols and provides a way to exchange routing information between RIP and OSPF networks. This case study provides examples of how to complete the following phases in redistributing information between RIP and OSPF networks, including the following topics: Configuring a RIP Network Adding OSPF to the Center of a RIP Network Adding OSPF Areas Setting Up Mutual Redistribution Configuring a RIP Network Figure 14-1 illustrates a RIP network. Three sites are connected with serial lines. The RIP network uses a Class B address and an 8-bit subnet mask. Each site has a contiguous set of network numbers. Figure?14-1: A RIP network.  Table 14-1 lists the network address assignments for the RIP network, including the network number, subnet range, and subnet masks. All interfaces indicate network ; however, the specific address includes the subnet and subnet mask. For example, serial interface 0 on Router C has an IP address of with a subnet mask of . Table?14-1: RIP Network Address Assignments Network Number Subnets Subnet Masks Site A: 8 through 15Site B: 16 through 23Site C: 24 through 31Serial Backbone: 62 through 64 Configuration File Examples The following commands in the configuration file for Router A determine the IP address for each interface and enable RIP on those interfaces: interface serial 0 ip address interface serial 1 ip address interface ethernet 0 ip address interface tokenring 0 ip address router rip network The following commands in the configuration file for Router B determine the IP address for each interface and enable RIP on those interfaces: interface serial 0 ip address in