cisco双机热备.doc
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1、如有侵权,请联系网站删除,仅供学习与交流cisco双机热备【精品文档】第 13 页Cisco HSRP的配置 双机热备经典案例HSRP一般用于两台,也可以用于多台。必须在每台起HSRP上的路由器上配置。WhentheHSRPisconfiguredonanetworksegment,providesavirtualMediaAccessControl(MAC)addressandanIPaddressthatissharedamongroutersinagroupofroutersthatisrunningHSRP.Oneofthesedevicesisselectedbytheprotoco
2、ltobetheactiverouter.TheactiverouterreceivesandroutespacketsdestinedforthegroupsMACaddress.FornroutersrunningHSRP,therearen+1IPandMACaddressesassigned.但是aceive只有一台,standby只有一台,其实其他的都在监听状态。所以zyx说的是处在active和standby的状态的只有两台。附一个配置实例:version12.0servicetimestampsdebuguptimeservicetimestampsloguptimenoserv
3、icepassword-encryption!hostnamer1!enablepasswordcisco!ipsubnet-zero(新版的IOS都支持全0/1子网)!interfaceEthernet0ipaddress136.147.107.101255.255.0.0noipredirectsnoipdirected-broadcaststandby150timers515/*定义150组5秒交换一次hello信息,15秒没收到hello信息就开始切换*/standby150priority110/*定义150组的主路由器权值,值越大,为主路由器希望越大*/standby150pree
4、mpt/*enable150组的hsrp抢占功能*/standby150authenticationcisco/*设置150组的router身份验证串*/standby150ip136.147.107.100/*定义150组的浮动地址,也是这台router连接的网络的网关*/standby150trackEthernet0/*定义监控的端口*/!interfaceSerial0noipaddressnoipdirected-broadcastnoipmroute-cacheshutdownnofair-queue!ipclassless!linecon0transportinputnoneli
5、ne116lineaux0linevty04passwordciscologin!end配置基本HSRP例子: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#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#interfaceFastEthernet0/1Router1(config-if)#ipaddress172.22.1.3255.255.255.0Router1(config-if)#standby1ip1
6、72.22.1.1Router1(config-if)#standby1priority120Router1(config-if)#exitRouter1(config)#endRouter1#Router2:Router2#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router2(config)#interfaceFastEthernet1/0Router2(config-if)#ipaddress172.22.1.2255.255.255.0Router2(config-if)#standby1
7、ip172.22.1.1Router2(config-if)#standby1priority110(默认priorityis100)Router2(config-if)#exitRouter2(config)#endRouter2#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standby1mac-address0000.0c07.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#configureterminalEnterconfigurationcommands,o
8、neperline.EndwhCNTL/Z.Router1(config)#interfaceFastEthernet0/1Router1(config-if)#standby1ip172.22.1.1Router1(config-if)#standby1priority120Router1(config-if)#standby1preemptRouter1(config-if)#exitRouter1(config)#endRouter1#Router2#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.
9、Router2(config)#interfaceFastEthernet1/0Router2(config-if)#standby1ip172.22.1.1Router2(config-if)#standby1priority110Router2(config-if)#standby1preemptdelay60(最好有时延)Router2(config-if)#exitRouter2(config)#endRouter2#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standby1preemptdela
10、y6022.3.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#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#interfaceFastEthernet0/1Router1(config-if)#standby1ip172.22.1.1Router1(config-if)#standby1priority120Router1(config-if)#standby1preemptRouter1(config-if)
11、#standby1trackSerial0/020Router1(config-if)#exitRouter1(config)#endRouter1#从12.2(15)T后引入更多可追踪实例Router1#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#track11interfaceSerial1/1iproutingRouter1(config-track)#exitRouter1(config)#interfaceFastEthernet0/0Router1(conf
12、ig-if)#standby1ip172.22.1.1Router1(config-if)#standby1priority120Router1(config-if)#standby1preemptRouter1(config-if)#standby1track11decrement50Router1(config-if)#endRouter1#注释Router1#showtrackTrack11InterfaceSerial1/1iproutingIProutingisDown(hwadmin-down,ipdisabled)1change,lastchange00:12:48Tracked
13、by:HSRPFastEthernet0/0122.4.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#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#interfaceFastEthernet0/1Router1(config-if)#ipaddress172.22.1.3255.255.255.0Router1(config-if)#standby1ip172.22.1.1Router1(config-if)#standby1pr
14、iority120Router1(config-if)#standby1preemptRouter1(config-if)#standby2ip172.22.1.2Router1(config-if)#standby2priority110Router1(config-if)#standby2preemptRouter1(config-if)#exRouter1(config)#endRouter1#Router2#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router2(config)#inter
15、faceFastEthernet1/0Router2(config-if)#ipaddress172.22.1.4255.255.255.0Router2(config-if)#standby1ip172.22.1.1Router2(config-if)#standby1priority110Router2(config-if)#standby1preemptRouter2(config-if)#standby2ip172.22.1.2Router2(config-if)#standby2priority120Router2(config-if)#standby2preemptRouter2(
16、config-if)#exitRouter2(config)#endRouter2#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#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router2(config)#interfaceFastEthernet1/0Router2(config-if)#noipredirectsRouter2(config-if)#standbyredirectsdisab
17、leRouter2(config-if)#exitRouter2(config)#endRouter2#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#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#interfaceFastEthernet0/1Router1(config-if)#standby1ip172.22.1.1Router1(config-if)#standby1priority120Router1(config-i
18、f)#standby1preemptRouter1(config-if)#standby1timers13Router1(config-if)#exitRouter1(config)#endRouter1#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)#standby1timersmsec100msec30022.7.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-routebridging就
19、用下面的配置方法Router1#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router1(config)#interfaceTokenring0Router1(config-if)#ipaddress172.22.1.3Router1(config-if)#standbyip172.22.1.1Router1(config-if)#standbyuse-biaRouter1(config-if)#standbypriority120Router1(config-if)#standbypreemptR
20、outer1(config-if)#exitRouter1(config)#endRouter1#Router2#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.Router2(config)#interfaceTokenring0Router2(config-if)#ipaddress172.22.1.2Router2(config-if)#standbyip172.22.1.1Router2(config-if)#standbyuse-biaRouter2(config-if)#standbyprio
21、rity110Router2(config-if)#standbypreemptRouter2(config-if)#exitRouter2(config)#endRouter2#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-inaddress(BIA)来代替MAC来避免出现问题HSRP配置:R1#showrunBuildingconfiguration.Currentconfiguration:907bytes!version12.1noservicesingle-slot-reload-enableserviceti
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