HSRP 
劃分vlanR6(config-if)#switchport access vlan 10R6(config-if)#inter f1/2R6(config-if)#switchport access vlan 20R6(config)#interface range f1/3 -4配置R5>enR5#conf tR5(config)#vlan 10配置地址R5(config-if)#no shutR5(config)#inter vlan 10R5(config-if)#standby 2 ip 192.168.10.1配置佔先權R5(config-if)#standby 2 priority 150配置 vlan20配置佔先權R5(config-if)#standby 3 priority 145負載均衡% This switch is already the root of VLAN10 spanning treeVLAN 10 bridge priority set to 8192VLAN 10 bridge max aging time unchanged at 20VLAN 10 bridge hello time unchanged at 2VLAN 10 bridge forward delay unchanged at 15R5(config)#spanning-tree vlan 20 root secondaryVLAN 20 bridge priority set to 16384VLAN 20 bridge max aging time unchanged at 20VLAN 20 bridge hello time unchanged at 2VLAN 20 bridge forward delay unchanged at 15R5(config)#inter f1/0R5(config-if)#no switchportR5(config-if)#ip address 202.106.1.10R5(config-if)#ip address 202.106.1.10 255.255.255.0R5(config-if)#no shutR5(config)#ip route 0.0.0.0 0.0.0.0 202.106.1.1上配置R3>enR3#conf tR3(config)#inte f1/1給vlan搶佔R3(config-if)#inter vlan 20R3(config-if)#ip address 192.168.20.11 255.255.255.0R3(config-if)#no shutR3(config-if)#standby 3 ip 192.168.20.1R3(config-if)#standby 3 preemptR3(config-if)#standby 3 priority 150負載均衡VLAN 10 bridge priority set to 16384VLAN 10 bridge max aging time unchanged at 20VLAN 10 bridge hello time unchanged at 2VLAN 10 bridge forward delay unchanged at 15R3(config)#spanning-tree vlan 20 root primaryVLAN 20 bridge priority set to 8192VLAN 20 bridge max aging time unchanged at 20VLAN 20 bridge hello time unchanged at 2VLAN 20 bridge forward delay unchanged at 15R3(config)#ip route 0.0.0.0 0.0.0.0 202.106.10.1上配置：R4>enR4#conf tR4(config)#inter f0/0R4(config-if)#ip address 202.106.10.1 255.255.255.0測試結果
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