RIPV2 and Unicast Updates

By default, RIPV1 is a broadcast routing protocol. Alternatively, RIPV2 is a multicast routing protocol. To disable the multicast routing protocol behavior, you can configure RIP in unicast mode, which is achieved by enabling the neighbor command.

To exchange updates with only a few neighbors, you would configure the neighbor command on broadcast media.

Figure 7-6 shows that R1 only wants to exchange updates with R2. The R1 interface must be made passive. Then, the neighbor command should be defined for the IP address of R2. All other routers on this segment will exchange RIP updates with each other. Even R1 will receive routing updates from all other routers, but will not send updates to any of them except R2.

Figure 7-6. RIP in Unicase Mode

Figure 7-6. RIP in Unicase Mode

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