Gateway of last resort is not set
C 172.20.0.0/16 is directly connected, Serial0
O IA 172.21.0.0/16 [110/1572] via 172.20.0.2, 00:01:32, Serial0
O E2 172.16.0.0/16 [110/100] via 172.19.0.1, 00:01:32, Ethernet0
O E2 172.17.0.0/16 [110/100] via 172.19.0.1, 00:01:32, Ethernet0
O 172.18.0.0/16 [110/1572] via 172.19.0.1, 00:01:32, Ethernet0
C 172.19.0.0/16 is directly connected, Ethernet0