simply rip, 2 routers connected serially to 1... notice the gateway of last resort is not set... if you follow the output you'll see default-information originate put to good use in a rip environment... might save some typing... r2620_01(config)#do sh run | begin router rip
router rip
network 1.0.0.0
network 10.0.0.0
r2620_01#sh ip route
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
R 2.0.0.0/8 [120/1] via 10.0.20.2, 00:00:20, Serial0/0
R 3.0.0.0/8 [120/1] via 10.0.30.2, 00:00:04, Serial0/1
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.0.30.0/24 is directly connected, Serial0/1
C 10.0.30.2/32 is directly connected, Serial0/1
C 10.0.20.2/32 is directly connected, Serial0/0
C 10.0.20.0/24 is directly connected, Serial0/0
r2620_01#
r2620_02#sh ip route
Gateway of last resort is not set
R 1.0.0.0/8 [120/1] via 10.0.20.1, 00:00:27, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
R 3.0.0.0/8 [120/1] via 10.0.20.1, 00:00:27, Serial0/0
10.0.0.0/8 is variably subnetted, 5 subnets, 3 masks
R 10.0.30.0/24 [120/1] via 10.0.20.1, 00:00:27, Serial0/0
R 10.0.30.2/32 [120/1] via 10.0.20.1, 00:00:27, Serial0/0
C 10.0.20.0/24 is directly connected, Serial0/0
C 10.0.20.1/32 is directly connected, Serial0/0
r2620_02#
r2620_03#sh ip route
Gateway of last resort is not set
R 1.0.0.0/8 [120/1] via 10.0.30.1, 00:00:24, Serial0/0
R 2.0.0.0/8 [120/1] via 10.0.30.1, 00:00:24, Serial0/0
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.0.30.0/24 is directly connected, Serial0/0
C 10.0.30.1/32 is directly connected, Serial0/0
R 10.0.20.2/32 [120/1] via 10.0.30.1, 00:00:24, Serial0/0
R 10.0.20.0/24 [120/1] via 10.0.30.1, 00:00:24, Serial0/0
r2620_03#
r2620_01(config)#router rip
r2620_01(config-router)#default-information originate
r2620_01(config-router)#end
r2620_01#
r2620_02#sh ip route
Gateway of last resort is 10.0.20.1 to network 0.0.0.0
R 1.0.0.0/8 [120/1] via 10.0.20.1, 00:00:11, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
R 3.0.0.0/8 [120/1] via 10.0.20.1, 00:00:11, Serial0/0
10.0.0.0/8 is variably subnetted, 5 subnets, 3 masks
R 10.0.30.0/24 [120/1] via 10.0.20.1, 00:00:11, Serial0/0
R 10.0.30.2/32 [120/1] via 10.0.20.1, 00:00:11, Serial0/0
C 10.0.20.0/24 is directly connected, Serial0/0
C 10.0.20.1/32 is directly connected, Serial0/0
R* 0.0.0.0/0 [120/1] via 10.0.20.1, 00:00:11, Serial0/0
r2620_03#sh ip route
Gateway of last resort is 10.0.30.1 to network 0.0.0.0
R 1.0.0.0/8 [120/1] via 10.0.30.1, 00:00:19, Serial0/0
R 2.0.0.0/8 [120/1] via 10.0.30.1, 00:00:19, Serial0/0
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.0.30.0/24 is directly connected, Serial0/0
C 10.0.30.1/32 is directly connected, Serial0/0
R 10.0.20.2/32 [120/1] via 10.0.30.1, 00:00:19, Serial0/0
R 10.0.20.0/24 [120/1] via 10.0.30.1, 00:00:19, Serial0/0
R* 0.0.0.0/0 [120/1] via 10.0.30.1, 00:00:19, Serial0/0
r2620_03#
so rip propagated some default routes as noted by the asterisks in the output of r2 and r3... sigh... but not on r1... this is very exciting...
r2620_01#sh ip route
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
R 2.0.0.0/8 [120/1] via 10.0.20.2, 00:00:20, Serial0/0
R 3.0.0.0/8 [120/1] via 10.0.30.2, 00:00:20, Serial0/1
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.0.30.0/24 is directly connected, Serial0/1
C 10.0.30.2/32 is directly connected, Serial0/1
C 10.0.20.2/32 is directly connected, Serial0/0
C 10.0.20.0/24 is directly connected, Serial0/0
r2620_01#
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