预配置R1(config)#int lo0R1(config-if)#ip add 1.1.1.1 255.255.255.0R1(config-if)#int f0/0R1(config-if)#i
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预配置
R1(config)#int lo0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#int f0/0
R1(config-if)#ip add 192.168.0.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#end
R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2 255.255.255.0
R2(config-if)#int f0/0
R2(config-if)#ip add 192.168.0.2 255.255.255.0
R2(config-if)#no sh
R3(config)#int f0/0
R3(config-if)#ip add 192.168.0.3 255.255.255.0
R3(config-if)#no sh
R3(config-if)#exi
R3(config)#no ip routing
R3(config)#ip default-gateway 192.168.0.100
R3(config)#end
R4(config)#no ip routing
R4(config)#ip default-gateway 192.168.0.200
R4(config)#int f0/0
R4(config-if)#ip add 192.168.0.4 255.255.255.0
R4(config-if)#no sh
实验过程：
第一步：配置R1和R2配置vrrp
R1(config)#int f0/0
R1(config-if)#vrrp 1 ip 192.168.0.100
R1(config-if)#vrrp 1 priority 150
R1(config-if)#vrrp 2 ip 192.168.0.200
R2(config-if)#vrrp 1 ip 192.168.0.100
R2(config-if)#vrrp 2 ip 192.168.0.200
R2(config-if)#vrrp 2 pri 150
第二步：查看R1上vrrp的运行情况
R1#sh vrrp
FastEthernet0/0 - Group 1
State is Master
Virtual IP address is 192.168.0.100
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 150
Master Router is 192.168.0.1 (local), priority is 150
Master Advertisement interval is 1.000 sec
Master Down interval is 3.414 sec
FastEthernet0/0 - Group 2
State is Backup
Virtual IP address is 192.168.0.200
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.0.2, priority is 150
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 2.745 sec)
R1#sh vrrp bri
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 150 3414 Y Master 192.168.0.1 192.168.0.100
Fa0/0 2 100 3609 Y Backup 192.168.0.2 192.168.0.200
第四步：现在在R3和R4上测试与网关的通信
R3#
*Dec 13 21:46:24.451: %SYS-5-CONFIG_I: Configured from console by console
R3#ping 192.168.0.100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.100, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/219/1036 ms
R4#ping 192.168.0.200
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.200, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/218/1036 ms
第五步：现在同时在R3、R4上准备ping测试
在down掉之后
R3#ping 192.168.0.100 repeat 100000
Type escape sequence to abort.
Sending 100000, 100-byte ICMP Echos to 192.168.0.100, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
R4#ping 192.168.0.200 repeat 1000000
Type escape sequence to abort.
Sending 1000000, 100-byte ICMP Echos to 192.168.0.200, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!..!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!
第六步：在Down掉接口后的不同变化
FastEthernet0/0 - Group 2
State is Master
Virtual IP address is 192.168.0.200
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.0.1 (local), priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec
FastEthernet0/0 - Group 2
State is Backup
Virtual IP address is 192.168.0.200
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.0.2, priority is 150
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.385 sec)
