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标题:
思科HSRP双机热备方案配置经典案例
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作者:
思考的牛
时间:
2009-12-26 22:51
标题:
思科HSRP双机热备方案配置经典案例
提问 "当主用路由器当掉以后备份路由器可以接管主用路由器的IP地址和MAC地址
回答
Router1:
Router1#configure terminal
Router1(config)#interface FastEthernet 0/1
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)#exit
Router1(config)#end
Router1#
Router2:
Router2#configure terminal
Router2(config)#interface FastEthernet 1/0
Router2(config-if)#ip address 172.22.1.2 255.255.255.0
Router2(config-if)#standby 1 ip 172.22.1.1
Router2(config-if)#standby 1 priority 110 (默认priority is 100)
Router2(config-if)#exit
Router2(config)#end
Router2# feedom.net
注释 由于HSRP虚拟出来的MAC地址跟组相关,所以可能会出现同一交换机收到多个相同的MAC地址的情况,这时候就需要用standby 1 mac-address 0000.0c07.ad01 命令来人工指定一个MAC地址
提问 强制某个路由器启动后一直在组中处于主用状态
回答
Router1#configure terminal
Router1(config)#interface FastEthernet 0/1
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)#exit
Router1(config)#end
Router1#
Router2#configure terminal
Router2(config)#interface FastEthernet 1/0
Router2(config-if)#standby 1 ip 172.22.1.1
Router2(config-if)#standby 1 priority 110
Router2(config-if)#standby 1 preempt delay 60 (最好有时延)
Router2(config-if)#exit
Router2(config)#end
注释 正常情况下当LAN端口up后就会发生强占,而此时可能网络还没有收敛,所以建议配置强占延迟时间,让路由器启动后过一段时间再发起强占standby 1 preempt delay 60
22.3. 配置HSRP对接口问题追踪的支持
提问 当主用路由器的上联端口出现问题后主动切换到备用路由器
回答
Router1#configure terminal
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
从12.2(15)T后引入更多可追踪实例 54com.cn
Router1#configure terminal
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
注释 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
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
Router2#configure terminal
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
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
Router2#configure terminal
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# 54ne.com
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
Router1#configure terminal
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
Router1#configure terminal
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
Router2#configure terminal
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
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
作者:
小华
时间:
2009-12-27 23:01
好贴!顶。。
作者:
李建伟
时间:
2009-12-28 10:30
提示:
该帖被管理员或版主屏蔽
作者:
REDERSUN
时间:
2009-12-28 12:07
好帖,顶!
作者:
IT民工
时间:
2010-1-3 20:10
学习了,顶
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