Gateway of last resort is not set
C 172.17.0.0/16 is directly connected, Serial0
R 172.16.0.0/16 [120/1] via 172.17.0.1, 00:00:07, Serial0
C 172.19.0.0/16 is directly connected, FastEthernet0
I 172.18.0.0/16 [100/80235] via 172.19.0.2, 00:00:08, FastEthernet0
I 172.21.0.0/16 [100/610] via 172.19.0.2, 00:00:08, FastEthernet0
I 172.20.0.0/16 [100/1110] via 172.19.0.2, 00:00:08, FastEthernet0