C 192.168.1.0/24 is directly connected, FastEthernet0/0 S 192.168.2.0/24 [1/0] via 192.168.1.2 C 192.168.3.0/24 is directly connected, FastEthernet0/1 S 192.168.10.0/24 [1/0] via 192.168.1.2 C 192.168.20.0/24 is directly connected, Loopback0 S 192.168.30.0/24 [1/0] via 192.168.3.2
在R2路由上配置 Router>en Router#conf t Router(config)#inter fa0/0 Router(config-if)#ip address 192.168.2.2 255.255.255.0 Router(config-if)#no shut Router(config-if)#inter fa0/1 Router(config-if)#ip address 192.168.3.2 255.255.255.0 Router(config-if)#no shut Router(config)#inter loopback 0 Router(config-if)#ip address 192.168.30.1 255.255.255.0 Router(config-if)#no shut Router(config)#ip route 192.168.1.0 255.255.255.0 192.168.3.1 Router(config)#ip route 192.168.10.0 255.255.255.0 192.168.2.1 Router(config)#ip route 192.168.20.0 255.255.255.0 192.168.3.1 Router(config)#do show ip rou S 192.168.1.0/24 [1/0] via 192.168.3.1 C 192.168.2.0/24 is directly connected, FastEthernet0/0 C 192.168.3.0/24 is directly connected, FastEthernet0/1 S 192.168.10.0/24 [1/0] via 192.168.2.1 S 192.168.20.0/24 [1/0] via 192.168.3.1 C 192.168.30.0/24 is directly connected, Loopback0
最后测试连通性 Router#ping 192.168.10.1 Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 31/31/32 ms Router#ping 192.168.30.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.30.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 16/16/16 ms 其他路由也能ping通