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

R2(config)# 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 实验过程

第一步:配置R1的HSRP R1(config)#int f0/0 R1(config-if)#standby 1 ip 192.168.0.100 R1(config-if)#standby 1 priority 150 R1(config-if)#standby 1 track lo0 60 R1(config-if)#standby 1 preempt 第二步:配置R2的HSRP R2(config)#int f0/0 R2(config-if)#standby 1 ip 192.168.0.100 R2(config-if)#standby 1 track lo0 R2(config-if)#standby 1 preempt R2(config-if)#exit 第三步:在R3上ping 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 = 4/220/1052 ms 第四步:我们在R1上down到lo0,后在show R2的standby R2(config)#do sh standby FastEthernet0/0 - Group 1 State is Active 2 state changes, last state change 00:00:50 Virtual IP address is 192.168.0.100 Active virtual MAC address is 0000.0c07.ac01 Local virtual MAC address is 0000.0c07.ac01 (default) Hello time 3 sec, hold time 10 sec Next hello sent in 0.808 secs Preemption enabled Active router is local Standby router is 192.168.0.1, priority 90 (expires in 8.804 sec) Priority 100 (default 100) Track interface Loopback0 state Up decrement 10 IP redundancy name is "hsrp-Fa0/0-1" (default) //R2为active路由器 第五步:我们在打开int lo0,并查看 R2(config)#do sh standby FastEthernet0/0 - Group 1 State is Standby 4 state changes, last state change 00:00:18 Virtual IP address is 192.168.0.100 Active virtual MAC address is 0000.0c07.ac01 Local virtual MAC address is 0000.0c07.ac01 (default) Hello time 3 sec, hold time 10 sec Next hello sent in 2.972 secs Preemption enabled Active router is 192.168.0.1, priority 150 (expires in 8.976 sec) Standby router is local Priority 100 (default 100) Track interface Loopback0 state Up decrement 10 IP redundancy name is "hsrp-Fa0/0-1" (default) //R2原 为 备份路由器。