第一步：R1上的预配置R1(config)#int lo0R1(config-if)#ip add 1.1.1.1 255.255.255.0R1(config-if)#int s1/2R1(conf
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第一步：R1上的预配置
R1(config)#int lo0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#int s1/2
R1(config-if)#ip add 12.0.0.1 255.255.255.0
R1(config-if)#no sh
第二步：R2上的预配置
R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2 255.255.255.0
R2(config)#int s2/1
R2(config-if)#ip add 12.0.0.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#int s2/3
R2(config-if)#ip add 23.0.0.2 255.255.255.0
R2(config-if)#no sh
第三步：R3上的预配置
R3(config)#int lo0
R3(config-if)#ip add 3.3.3.3 255.255.255.0
R3(config-if)#int s3/2
R3(config-if)#ip add 23.0.0.3 255.255.255.0
R3(config-if)#no sh
实验过程：
第一步：在R1、R2和R3上加一条路由使所有直连的网段都能ping通
R1(config)#ip route 2.2.2.0 255.255.255.0 12.0.0.2
R1#ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/10/16 ms
R2(config)#ip route 1.1.1.0 255.255.255.0 12.0.0.1
R2(config)#ip route 3.3.3.0 255.255.255.0 23.0.0.3
R2#ping 23.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/20/36 ms
R2#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/19/40 ms
R3(config)#ip route 2.2.2.0 255.255.255.0 23.0.0.2
R3#ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms
第二步：在R1上加上去23.0.0.0网段的路由
R1(config)#ip route 23.0.0.0 255.255.255.0 12.0.0.2
第三步：在R3上加上去12.0.0.0网段的路由
R3(config)#ip route 12.0.0.0 255.255.255.0 23.0.0.2
第四步：在R1上加上去3.3.3.0网段的路由
R1(config)#ip route 3.3.3.0 255.255.255.0 12.0.0.2
第五步：在R3上加上去1.1.1.0网段的路由
R3(config)#ip route 1.1.1.0 255.255.255.0 23.0.0.2
第六步：做全网通的测试
R1上的结果
R1#ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/13/36 ms
R1#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/48/72 ms
R1#ping 23.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/8/12 ms
R1#ping 23.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/37/76 ms
R2上的结果
R2#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/12/28 ms
R2#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/19/60 ms
R2#ping 12.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms
R2#ping 23.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/19/36 ms
R3上的结果
R3#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/22/40 ms
R3#ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/12/28 ms
R3#ping 12.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/30/72 ms
R3#ping 12.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/25/40 ms
