双出口互备份方案(hsrp技术)

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1、双出口,负载平衡,互备份方案(需使用NAT)说明：内部网络分别有两条专线接入（telecnc）内部网络有vlan2vlan3两个vlan要求vlan2的用户默认走tele，当tele出口中断后自动切换到cnc出口。反之依然。使用技术：HSRPNAT注意：此技术在使用例：“standbyxxtrackf0/070”时只要f0/0接口有任何异常(端口down或者协议down)standby均会自动切换到另一条线路.除非端口down,如果协议down的情况下需要等待端口的keepalive检测出来协议才会down.(默认keepalive是10s

2、encond)但是如果将端口的keepalive时间调整过短,如果线路不稳定,就会引起端口抖动.如果keepalive时间过长.当线路外界dowm掉后,需要等很长时间才能发现协议down.(即keepalive的检测周期)*实际操作中如果是专线接入,从运营商的设备到本地设备可能通过了很多交换设备.所以即使某一段链路down了.本地也有可能检测不出来,即端口和协议仍然是up.拓扑如下：配置如下：Tele：tele#shrunBuildingconfiguration...Currentconfiguration:1293bytes!versi

3、on12.3servicetimestampsdebugdatetimemsecservicetimestampslogdatetimemsecnoservicepassword-encryption!hostnametele!boot-start-markerboot-end-marker!noaaanew-modelipsubnet-zero!ipsshbreak-string!novoicehpicapturebuffernovoicehpicapturedestination!interfaceFastEthernet0/0noip

4、addressduplexautospeedauto!interfaceFastEthernet0/0.2encapsulationdot1Q2ipaddress10.10.10.2255.255.255.0ipnatinsidestandby10ip10.10.10.1standby10priority150standby10preemptstandby10trackFastEthernet0/160!interfaceFastEthernet0/0.3encapsulationdot1Q3ipaddress20.20.20.2255.2

5、55.255.0ipnatinsidestandbytrackFastEthernet0/1standby20ip20.20.20.1standby20preempt!interfaceFastEthernet0/1ipaddress192.168.1.1255.255.255.0ipnatoutsideduplexautospeedauto!ipnatinsidesourcelist10interfaceFastEthernet0/1overloadiphttpservernoiphttpsecure-serveripclasslessi

6、proute0.0.0.00.0.0.0FastEthernet0/1!access-list10permitany!linecon0exec-timeout00loggingsynchronoustransportpreferredalltransportoutputalllineaux0transportpreferredalltransportoutputalllinevty04!EndCNC：cnc#shrunBuildingconfiguration...Currentconfiguration:1294bytes!version

7、12.3servicetimestampsdebugdatetimemsecservicetimestampslogdatetimemsecnoservicepassword-encryption!hostnamecnc!boot-start-markerboot-end-marker!noaaanew-modelipsubnet-zero!ipsshbreak-string!novoicehpicapturebuffernovoicehpicapturedestination!interfaceFastEthernet0/0noipadd

8、ressduplexautospeedauto!interfaceFastEthernet0/0.2encapsulationdot1Q2ipaddress10.10.10.32