双ISP接入负载均衡NAT与IP SLA链路检测实验配置.doc

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1、双ISP接入负载均衡NAT与IPSLA链路检测实验配置CE路由器为企业边缘路由器，f0/0,f2/0分别为ISP1，ISP2接口做负载均衡，loopback0接口模拟内部主机。内部流量负载均衡到ISP1与ISP2两条链路上，为模拟出负载均衡流量，CE的loopback0、f0/0、f2/0接口上禁用了快速交换（iproutecache）以及CEF并启用了基于per-packet的负载均衡（ipload-sharingper-packet）。通过在CE路由器上配置IPSLA来检测ISP链路的可用性。Intern

2、et-server路由器的loopback0接口模拟internet上的某个server，并且此server也是双ISP接入。CEconfigurationCE#shrunBuildingconfiguration...Currentconfiguration:2288bytes!version12.4servicetimestampsdebugdatetimemsecservicetimestampslogdatetimemsecnoservicepassword-encryption!hostnameCE

3、!boot-start-markerboot-end-marker!!noaaanew-modelmemory-sizeiomem5!!ipcefnoipdomainlookup!!ipslamonitor1typeechoprotocolipIcmpEcho172.16.2.1source-interfaceFastEthernet0/0ipslamonitorschedule1lifeforeverstart-timenowipslamonitor2typeechoprotocolipIcmpEcho17

4、2.31.2.1source-interfaceFastEthernet2/0ipslamonitorschedule2lifeforeverstart-timenow!!!!track1rtr1reachability#将track与ipsla关联起来，track根据ipsla的返回代码来断定链路UP/DOWN!track2rtr2reachability!!!!!interfaceLoopback0ipaddress1.1.1.1255.255.255.255ipload-sharingper-packe

5、tipnatinsideipvirtual-reassemblynoiproute-cachecefnoiproute-cache!interfaceFastEthernet0/0descriptionisp1ipaddress172.16.1.1255.255.255.0ipload-sharingper-packetipnatoutsideipvirtual-reassemblynoiproute-cachecefnoiproute-cacheduplexautospeedauto!interfaceSe

6、rial1/0noipaddressshutdownserialrestart-delay0!interfaceSerial1/1noipaddressshutdownserialrestart-delay0!interfaceSerial1/2noipaddressshutdownserialrestart-delay0!interfaceSerial1/3noipaddressshutdownserialrestart-delay0!interfaceFastEthernet2/0descriptioni

7、sp2ipaddress172.31.1.1255.255.255.0ipload-sharingper-packetipnatoutsideipvirtual-reassemblynoiproute-cachecefnoiproute-cacheduplexautospeedauto!iphttpservernoiphttpsecure-server!iproute0.0.0.00.0.0.0FastEthernet0/0172.16.1.2track1#根据trackreachability状态UP/DO

8、WN默认路由iproute0.0.0.00.0.0.0FastEthernet2/0172.31.1.2track2iproute172.16.2.1255.255.255.255FastEthernet0/0#首先解决IPSLA检测目标的路由，而后默认路由才能UPiproute172.31.2.1255.255.255.255FastEthernet2/0!ipnatinsidesourcerou