一、实验目的：使用OSPF协议达到全网互通的效果
二、拓扑图
三、具体步骤配置
（1）R1路由器配置
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R1
R1(config)#interface l0
R1(config-if)#ip address 1.1.1.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#interface s0/0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#clock rate 64000
R1(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
R1(config-if)#exit
R1(config)#router ospf 1
R1(config-router)#router-id 1.1.1.1
R1(config-router)#network 1.1.1.0 0.0.0.255 area 0
R1(config-router)#network 192.168.1.0 0.0.0.255 area 0
R1(config-router)#end
（2）R2路由器配置
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R2
R2(config)#interface l0
R2(config-if)#ip address 2.2.2.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#interface s0/0/0
R2(config-if)#ip address 192.168.1.2 255.255.255.0
R2(config-if)#clock rate 64000
This command applies only to DCE interfaces
R2(config-if)#no shutdown
R2(config-if)#interface s0/0/1
R2(config-if)#ip address 192.168.2.1 255.255.255.0
R2(config-if)#clock rate 64000
R2(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial0/0/1, changed state to down
R2(config-if)#exit
R2(config)#router ospf 1
R2(config-router)#router-id 2.2.2.2
R2(config-router)#network 2.2.2.0 0.0.0.255 area 0
R2(config-router)#network 192.168.1.0 0.0.0.255 area 0
R2(config-router)#network 192.168.2.0 0.0.0.255 area 0
R2(config-router)#end
（3）R3路由器配置
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R3
R3(config)#interface l0
R3(config-if)#ip address 3.3.3.3 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#interface s0/0/0
R3(config-if)#ip address 192.168.3.1 255.255.255.0
R3(config-if)#clock rate 64000
R3(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
R3(config-if)#interface s0/0/1
R3(config-if)#ip address 192.168.2.2 255.255.255.0
R3(config-if)#clock rate 64000
This command applies only to DCE interfaces
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#router ospf 1
R3(config-router)#router-id 3.3.3.3
R3(config-router)#network 3.3.3.0 0.0.0.255 area 0
R3(config-router)#network 192.168.3.0 0.0.0.255 area 0
R3(config-router)#network 192.168.2.0 0.0.0.255 area 0
R3(config-router)#end
（4）R4路由器配置
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R4
R4(config)#interface l0
R4(config-if)#ip address 4.4.4.4 255.255.255.0
R4(config-if)#no shutdown
R4(config-if)#interface s0/0/0
R4(config-if)#ip address 192.168.3.2 255.255.255.0
R4(config-if)#clock rate 64000
This command applies only to DCE interfaces
R4(config-if)#no shutdown
R4(config-if)#exit
R4(config)#router ospf 1
R4(config-router)#router-id 4.4.4.4
R4(config-router)#network 4.4.4.0 0.0.0.255 area 0
R4(config-router)#network 192.168.3.0 0.0.0.255 area 0
R4(config-router)#end
四、验证测试
（1）查看R1路由表信息
（2）查看R1的OSPF协议数据库信息
（3）测试网络是否互通
结果：全网互通成功