Holding Down RIP Propagations
You probably don’t want your RIP network advertised everywhere on your LAN and WAN.
There’s not a whole lot to be gained by advertising your RIP network to the Internet, now, is
there?
To stop route updates from being sent out an interface, use the command in Table 3.11:
Here’s an example of how to configure a passive interface on a router using the CLI:
Lab_A#config t
Lab_A(config)#router rip
Lab_A(config-router)#network 192.168.10.0
Lab_A(config-router)#passive-interface serial 0/0
This command will stop RIP updates from being propagated out serial interface 0/0, but
serial interface 0/0 can still receive RIP updates.