22.4. HSRP负载均衡
提问 在两台或者多台HSRP路由器上实现流量的负载均衡
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface FastEthernet0/1
Router1(config-if)#ip address 172.22.1.3 255.255.255.0
Router1(config-if)#standby 1 ip 172.22.1.1
Router1(config-if)#standby 1 priority 120
Router1(config-if)#standby 1 preempt
Router1(config-if)#standby 2 ip 172.22.1.2
Router1(config-if)#standby 2 priority 110
Router1(config-if)#standby 2 preempt
Router1(config-if)#exit
Router1(config)#end
Router1#
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface FastEthernet1/0
Router2(config-if)#ip address 172.22.1.4 255.255.255.0
Router2(config-if)#standby 1 ip 172.22.1.1
Router2(config-if)#standby 1 priority 110
Router2(config-if)#standby 1 preempt
Router2(config-if)#standby 2 ip 172.22.1.2
Router2(config-if)#standby 2 priority 120
Router2(config-if)#standby 2 preempt
Router2(config-if)#exit
Router2(config)#end
Router2#
注释 由于出现两个网关，所以需要在终端设备上分开配置各自的缺省网关。
22.5. HSRP中ICMP重定向
提问 在HSRP中启用ICMP重定向
回答
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface FastEthernet 1/0
Router2(config-if)#no ip redirects
Router2(config-if)#standby redirects disable
Router2(config-if)#exit
Router2(config)#end
Router2#
注释
22.6. 调整HSRP定时器
提问 调整备份路由器接管主用路由器所需时长
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface FastEthernet0/1
Router1(config-if)#standby 1 ip 172.22.1.1
Router1(config-if)#standby 1 priority 120
Router1(config-if)#standby 1 preempt
Router1(config-if)#standby 1 timers 1 3
Router1(config-if)#exit
Router1(config)#end
Router1#
注释 缺省Hello包时长为3秒，10秒后会接管，如果主用路由器调整时长，整个组内的路由器都要调整为相同的时长。最短可以到达毫秒Router1(config-if)#standby 1 timers msec 100 msec 300
22.7. 在令牌环网络中使用HSRP
提问 在令牌环网络中配置HSRP
回答
如果只用IP协议配置同前面例子，如果还有其他协议，特别是使用了source-route bridging就用下面的配置方法
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Tokenring0
Router1(config-if)#ip address 172.22.1.3
Router1(config-if)#standby ip 172.22.1.1
Router1(config-if)#standby use-bia
Router1(config-if)#standby priority 120
Router1(config-if)#standby preempt
Router1(config-if)#exit
Router1(config)#end
Router1#
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface Tokenring0
Router2(config-if)#ip address 172.22.1.2
Router2(config-if)#standby ip 172.22.1.1
Router2(config-if)#standby use-bia
Router2(config-if)#standby priority 110
Router2(config-if)#standby preempt
Router2(config-if)#exit
Router2(config)#end
Router2#
注释 由于令牌环网络会用到设备的MAC地址信息，所以如果HSRP用到虚拟MAC就会出问题，因此在配置中使用了burned-in address (BIA)来代替MAC来避免出现问题
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