December 27, 2013

Lab 17: RIP Distance Poisoning

Configure RIP on all routers. After the configuration, R1's RIP routing table will be like this:

R1#show ip route rip
     192.168.0.0/32 is subnetted, 2 subnets
R       192.168.0.2 [120/1] via 12.0.0.2, 00:00:20, Serial0/1
R       192.168.0.3 [120/1] via 13.0.0.2, 00:00:14, Serial0/0

As you see, all routes have administrative distance of 120. Lets' modify the administrative distance of 192.168.0.2/32:

router rip
 distance 50 12.0.0.2 0.0.0.0

As a result, administrative distance of 192.168.0.2/32 becomes 50:

R1#show ip route rip
     192.168.0.0/32 is subnetted, 2 subnets
R       192.168.0.2 [50/1] via 12.0.0.2, 00:00:23, Serial0/1
R       192.168.0.3 [120/1] via 13.0.0.2, 00:00:10, Serial0/0

# DOWNLOAD LAB 17 GNS3 FILE