Information Technology Reference
In-Depth Information
R3 is not sending any of the 172.30.0.0 subnets—only the summarized route of 172.30.0.0/16, includ-
ing the subnet mask. This is why R2 and R1 are not seeing the 172.30.0.0 subnets on R3.
Task 6: Disable Automatic Summarization
The no auto-summary command is used to turn off automatic summarization in RIPv2. Disable auto
summarization on all routers. The routers will no longer summarize routes at major network bound-
aries.
R2(config)# router rip
R2(config-router)# no auto-summary
R1(config)# router rip
R1(config-router)# no auto-summary
R3(config)# router rip
R3(config-router)# no auto-summary
The show ip route and ping commands can be used to verify that automatic summarization is off.
Task 7: Examine the Routing Tables
The LANs connected to R1 and R3 should now be included in all three routing tables.
R2# show ip route
Output omitted
10.0.0.0/16 is subnetted, 1 subnets
C 10.1.0.0 is directly connected, FastEthernet0/0
172.30.0.0/16 is variably subnetted, 7 subnets, 3 masks
R 172.30.0.0/16 [120/1] via 209.165.200.230, 00:01:28, Serial0/0/0
[120/1] via 209.165.200.234, 00:01:56, Serial0/0/1
R 172.30.1.0/24 [120/1] via 209.165.200.230, 00:00:08, Serial0/0/0
R 172.30.2.0/24 [120/1] via 209.165.200.230, 00:00:08, Serial0/0/0
R 172.30.100.0/24 [120/1] via 209.165.200.234, 00:00:08, Serial0/0/1
R 172.30.110.0/24 [120/1] via 209.165.200.234, 00:00:08, Serial0/0/1
R 172.30.200.16/28 [120/1] via 209.165.200.234, 00:00:08, Serial0/0/1
R 172.30.200.32/28 [120/1] via 209.165.200.234, 00:00:08, Serial0/0/1
209.165.200.0/30 is subnetted, 2 subnets
C 209.165.200.228 is directly connected, Serial0/0/0
C 209.165.200.232 is directly connected, Serial0/0/1R2#
R1# show ip route
Output omitted
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
R 10.0.0.0/8 [120/1] via 209.165.200.229, 00:02:13, Serial0/0/0
R 10.1.0.0/16 [120/1] via 209.165.200.229, 00:00:21, Serial0/0/0
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