Configuring gated

Configuring the RIP Protocol

With one interface, A can listen to RIP traffic on the network but does not forward routing information. Routers must be multicasting RIP packets on this network for A to learn about them and update its routing table. The first syntax statement enables RIP on node A’s interface (121.1.0.10) to multicast routing information. The second statement specifies a static local default route to prevent gated from deleting it.

B: RIP Router

Set up /etc/gated.conf as follows:

rip yes {

interface all version 2 multicast ;

};

This enables the RIP protocol to multicast routing information on all interfaces.

Example of a Large RIP Configuration

Figure 3-2 and the accompanying text describe how to configure gated for the RIP protocol in each node within a networked system.

B, D, and E pass routing information among themselves and update their routes accordingly. C listens to the RIP conversation between B, D, and E, and updates its routes accordingly. If both the routers D and E can provide a path to a network, but the path through router D is shorter, nodes B, C, and E use router D when routing packets to that network. If D goes down, E becomes the new router to that network for the nodes B, C, and E.

Chapter 3

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