第一步：R1上的配置R1(config)#int lo0 R1(config-if)#ip add 1.1.1.1 255.255.255.0R1(config-if)#int s2/1R1(conf
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第一步：R1上的配置
R1(config)#int lo0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#int s2/1
R1(config-if)#ip add 12.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config)#router ospf 11
R1(config-router)#net 12.1.1.1 0.0.0.255 area 0
R1(config-router)#net 1.1.1.1 0.0.0.255 area 1
R1(config-router)#end
第二步：R2上的配置
R2(config)#int s2/1
R2(config-if)#ip add 12.1.1.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#int s2/2
R2(config-if)#ip add 23.1.1.1 255.255.255.0
R2(config)#router ospf 11
R2(config-router)#net 12.1.1.2 0.0.0.255 area 0
R2(config-router)#net 23.1.1.1 0.0.0.255 area 0
R2(config-router)#end
第三步：R3上的配置
R3(config)#int lo0
R3(config-if)#ip add 3.3.3.3 255.255.255.0
R3(config-if)#int s2/1
R3(config-if)#ip add 23.1.1.3 255.255.255.0
R3(config-if)#no sh
R3(config-router)#net 3.3.3.3 0.0.0.255 area 3
R3(config-router)#net 23.1.1.3 0.0.0.255 area 0
第四步：查看R1、R2、R3的路由表
R1#sh ip rou
………………
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3 [110/129] via 12.1.1.2, 00:00:16, Serial2/1
23.0.0.0/24 is subnetted, 1 subnets
O 23.1.1.0 [110/128] via 12.1.1.2, 00:00:16, Serial2/1
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial2/1
R1#
R2#sh ip rou
………………
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/65] via 12.1.1.1, 00:00:41, Serial2/1
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3 [110/65] via 23.1.1.3, 00:00:41, Serial2/2
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial2/2
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial2/1
R2#
R3#sh ip rou
………………
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/129] via 23.1.1.1, 00:00:38, Serial2/1
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial2/1
12.0.0.0/24 is subnetted, 1 subnets
O 12.1.1.0 [110/128] via 23.1.1.1, 00:00:38, Serial2/1
第五步：ping测试全网是否连通
R1#ping
Protocol [ip]:
Target IP address: 3.3.3.3
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 1.1.1.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/56/64 ms
R1#
