FO/O要求：客户端访问电信的地址走电信路由器，访问网通地址走网通路由器，当isp的线路断掉时可以自动切换到另一个isp。拓扑图：Loop01.1.LI网逋Loop12/12/2网通Loop2:HL3屯苗Loop314.4.4业信Loop45+5.5.5电佰命网段Q/L30网段：0/Dto网段配置：主要的配置在R2上面，广域网的路由器运行ospfR2#showrunBuildingconfiguration.Currentconfiguration:1873bytes!version12.4servicetimestampsdebugdatetimemsecservicetimestampslogdatetimemsecnoservicepassword-encryption!hostnameR2!boot-start-markerboot-end-markernoaaanew-modelmemory-sizeiomem5!ipcef!ipslamonitor1
