R1(config)#int lo0 R1(config-if)#ip add 1.1.1.1 255.255.255.0 R1(config-if)#ip ospf 1 area 0 R1(config-if)#int e0/0 R1(config-if)#ip add 192.168.14.1 255.255.255.0 R1(config-if)#no sh R1(config-if)#ip ospf 1 area 0 R1(config-if)#int e0/1 R1(config-if)#ip add 192.168.123.251 255.255.255.0 R1(config-if)#no sh ================================= R2(config)#int lo0 R2(config-if)#ip add 2.2.2.2 255.255.255.0 R2(config-if)#ip ospf 1 area 0 R2(config-if)#int e0/0 R2(config-if)#ip add 192.168.24.2 255.255.255.0 R2(config-if)#no sh R2(config-if)#ip ospf 1 area 0 R2(config-if)#int e0/1 R2(config-if)#ip add 192.168.123.252 255.255.255.0 R2(config-if)#no sh ===================================== R3(config)#int e0/0 R3(config-if)#ip add 192.168.123.3 255.255.255.0 R3(config-if)#no sh R3(config-if)#ip route 0.0.0.0 0.0.0.0 192.168.123.254 ========================================= R4(config)#int lo0 R4(config-if)#ip add 4.4.4.4 255.255.255.0 R4(config-if)#ip ospf 1 area 0 R4(config-if)#int e0/0 R4(config-if)#ip add 192.168.14.4 255.255.255.0 R4(config-if)#no sh R4(config-if)#ip ospf 1 area 0 R4(config-if)#int e0/1 R4(config-if)#ip add 192.168.24.4 255.255.255.0 R4(config-if)#no sh R4(config-if)#ip ospf 1 area 0
配置HSRP
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R1和R2 interface Ethernet0/1 standby 1 ip 192.168.123.254
查看HSRP运行状态
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R1#sh standby Ethernet0/1 - Group 1 State is Active 2 state changes, last state change 00:00:38 Virtual IP address is 192.168.123.254 # 虚拟IP地址 Active virtual MAC address is 0000.0c07.ac01 # 虚拟MAC地址,0000.0c07.ac<standby组号> Local virtual MAC address is 0000.0c07.ac01 (v1 default) Hello time 3 sec, hold time 10 sec Next hello sent in 2.560 secs Preemption disabled # 默认角色不会被抢占 Active router is local Standby router is 192.168.123.252, priority 100 (expires in 10.800 sec) Priority 100 (default 100) # 优先级大的成为active Group name is "hsrp-Et0/1-1" (default) R1#show standby brief P indicates configured to preempt. | Interface Grp Pri P State Active Standby Virtual IP Et0/1 1 100 Active local 192.168.123.252 192.168.123.254
R1#show vrrp Ethernet0/1 - Group 1 State is Backup Virtual IP address is 192.168.123.254 Virtual MAC address is 0000.5e00.0101 Advertisement interval is 1.000 sec # hello间隔变为了1s Preemption enabled # 抢占默认开启 Priority is 100 Master Router is 192.168.123.252, priority is 100 Master Advertisement interval is 1.000 sec Master Down interval is 3.609 sec (expires in 3.016 sec) # 死亡时间变为了3s