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1、第16章距离矢量路由选择协议主要内容介绍路由信息协议（RIP）和内部网关协议（IGRP）。RouterconfigurationSelectroutingprotocolsSpecifynetworksorinterfacesNetwork160.89.0.0Network172.30.0.0IGRP,RIPNetwork172.16.0.0RIPRIPIGRP16.1IPRouting ConfigurationTasksDefinesanIProutingprotocolRouter(config)#routerprot
2、ocol[keyword]Mandatoryconfigurationcommandforeach IProutingprocessIdentifiesthephysicallyconnectednetworkthatroutingupdatesareforwardedtoRouter(config-router)#networknetwork-numberDynamicRoutingConfiguration19.2kbpsT1T1T1HopcountmetricselectsthepathRoutesupdateever
3、y30seconds16.2RIPOverviewStartstheRIProutingprocessRouter(config)#routerripRouter(config-router)#networknetwork-numberSelectsparticipatingattachednetworksThenetworknumbermustbeamajorclassfulnetworknumber1、RIPConfiguration2.3.0.0routerripnetwork172.16.0.0network10.0
4、.0.0RIPConfigurationExamplerouterripnetwork10.0.0.02.3.0.0routerripnetwork192.168.1.0network10.0.0.0172.16.1.1S2E0S3192.168.1.110.1.1.110.2.2.210.1.1.2S2S310.2.2.3172.16.1.0ABC192.168.1.0E02、VerifyingtheRoutingProtocol—RIPRouterA#shipprotocolsRoutingProtocolis"rip"
5、Sendingupdatesevery30seconds,nextduein0secondsInvalidafter180seconds,holddown180,flushedafter240…………..172.16.1.1S2E0S3192.168.1.110.1.1.110.2.2.210.1.1.2S2S310.2.2.3172.16.1.0ABC192.168.1.0E03、Displayingthe IPRoutingTableRouterA#shiprouteCodes:C-connected,S-static,
6、I-IGRP,R-RIP,M-mobile,B-BGPD-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterarea...Gatewayoflastresortisnotset172.16.0.0/24issubnetted,1subnetsC172.16.1.0isdirectlyconnected,Ethernet010.0.0.0/24issubnetted,2subnetsR10.2.2.0[120/1]via10.1.1.2,00:00:07,Serial2C10.1.1.0isd
7、irectlyconnected,Serial2R192.168.1.0/24[120/2]via10.1.1.2,00:00:07,Serial24、RIP避免路由环路方法1）使用跳数限制，最大15跳,16跳为无穷大2）距离矢量协议共用的方法splithorizonpoisonreversehold-downtimertriggeredupdates5、关于IPclassless路由1）有类IP与无类IP2）现在路由器的OS都支持无类路由3）RIPV2支持无类路由16.3关于IGRP1）基于距离矢量协议2）Cisco专有协
8、议3）度量标准改进提高跳数限制（255）增加了bandwidth、delay、reliability、load、MTU4）不支持VLSM，可使用EIGRP代替。ReviewQuestions1.Whatisanadvantageofusingastaticrouteratherthanad
