1、配置计算机PC0
IP:172.16.1.2
Submask:255.255.255.0
Gateway:172.16.1.1
2、配置服务器Server0
IP:172.16.4.2
Submask:255.255.255.0
Gateway:172.16.4.1
3、路由器0的配置：
R0>
R0>en
R0#conf t
R0(config)#int fa0/0
R0(config-if)#ip address 172.16.1.1 255.255.255.0
R0(config-if)#no shutdown
R0(config-if)#int fa1/0
R0(config-if)#ip address 172.16.2.1 255.255.255.0
R0(config-if)#no shutdown
R0(config-if)#exit
R0(config)#
4、配置路由器R1
Router>EN
Router#conf t
Router(config)#host R1
R1(config)#int fa1/0
R1(config-if)#ip address 172.16.2.2 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#
R1(config-if)#int s2/0
R1(config-if)#ip address 172.16.3.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#clock rate 64000
R1(config-if)#
5、配置路由器R2
Router>EN
Router#conf t
Router(config)#host R2
R2(config)#INT S2/0
R2(config-if)#IP address 172.16.3.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#
R2(config-if)#int fa0/0
R2(config-if)#ip address 172.16.4.1 255.255.255.0
R2(config-if)#no shutdown
6、配置路由器0
R0(config)#ip route 0.0.0.0 0.0.0.0 172.16.2.2
配置路由器2
R2(config-if)#exit
R2(config)#ip route 0.0.0.0 0.0.0.0 172.16.3.1
配置路由器1
R1(config-if)#exit
R1(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1
R1(config)#ip route 172.16.4.0 255.255.255.0 172.16.3.2
R1(config)#end
R1#
R1#show ip route
S 172.16.1.0 [1/0] via 172.16.2.1
C 172.16.2.0 is directly connected, FastEthernet1/0
C 172.16.3.0 is directly connected, Serial2/0
S 172.16.4.0 [1/0] via 172.16.3.2
R1#
7、测试连通性PC0
ping 172.16.4.2(success)
Web浏览器：http://172.16.4.2(success)
