Router2(config-if)#standby 1 preempt;;;;delay 60 (最好有時延)
Router2(config-if)#exit
Router2(config)#end
Router2#
注釋 正常情況下當LAN端口up后就會發(fā)生強占，而此時可能網(wǎng)絡(luò)還沒有收斂，所以建議配置強占延遲時間，讓路由器啟動后過一段時間再發(fā)起強占standby 1 preempt delay 60
22.3.;配置HSRP對接口問題追蹤的支持
提問 當主用路由器的上聯(lián)端口出現(xiàn)問題后主動切換到備用路由器
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 track Serial0/0 20
Router1(config-if)#exit
Router1(config)#end
Router1#
從12.2(15)T后引入更多可追蹤實例
Router1#configure terminal
Enter configuration commands, one per line.;End with CNTL/Z.
Router1(config)#track 11 interface Serial1/1 ip routing
Router1(config-track)#exit
Router1(config)#interface FastEthernet0/0
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 1 track 11 decrement 50
Router1(config-if)#end
Router1#
注釋 Router1#show track
Track 11
Interface Serial1/1 ip routing
IP routing is Down (hw admin-down, ip disabled)
1 change, last change 00:12:48
Tracked by:
HSRP FastEthernet0/0 1
22.4.;HSRP負載均衡
提問 在兩臺或者多臺HSRP路由器上實現(xiàn)流量的負載均衡
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#
注釋 由于出現(xiàn)兩個網(wǎng)關(guān)，所以需要在終端設(shè)備上分開配置各自的缺省網(wǎng)關(guān) 。
22.5.;HSRP中ICMP重定向
提問 在HSRP中啟用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#
注釋
22.6.;調(diào)整HSRP定時器
提問 調(diào)整備份路由器接管主用路由器所需時長
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
