Configuring-and-verifying-Route-Redistribution配置與驗證路由再分配教學課件

RedistributionSupportsAllProtocolsStepstoConfigureRedistributionintoRIPEnterrouterRIPconfigurationmodeConfigureredistributionfromanotherroutingprotocol;OSPFisusedabove.redistributeospf1R1(config-router)#R1(config-router)#redistributeospf1?

matchRedistributionofOSPFroutesmetricMetricforredistributedroutesroute-mapRoutemapreference…<cr>TheseoptionalparametersinfluenceredistributionintotheRIProutingprotocol.RedistributingintoRIPRedistributeintoRIPandassignthemetric3(3hops)toallOSPFroutes.StepstoConfigureRedistributionintoOSPFEnterrouterOSPFconfigurationmodeConfigureredistributionfromanotherroutingprotocol;EIGRPwithAS10isusedabove.TheseoptionalparametersinfluenceredistributionintoOSPFroutingprotocol.redistributeeigrp100metric100subnetsR1(config-router)#R1(config-router)#redistributeeigrp100?

metricMetricforredistributedroutesmetric-typeOSPF/IS-ISexteriormetrictypefor redistributedroutesroute-mapRoutemapreferencesubnetsConsidersubnetsforredistributionintoOSPFtagSettagforroutesredistributedintoOSPF…<cr>RedistributingintoOSPFRedistributefromEIGRPAS100intoOSPFandchangethemetrictypefromtype2totype1.StepstoConfigureRedistributionintoEIGRPEnterrouterEIGRPconfigurationmodeConfigureredistributionfromanotherroutingprotocol;OSPFwithprocessnumber1isusedabove.TheseoptionalparametersinfluenceredistributionintoEIGRProutingprotocol.redistributeospf1R1(config-router)#R1(config-router)#redistributeospf1?

matchRedistributionofOSPFroutesmetricMetricforredistributedroutesroute-mapRoutemapreference…<cr>DefaultMetricThedefaultmetricissetto:Bandwidthinkilobits=10000,Delayintensofmicroseconds=100,Reliability=255(maximum),Load=1(minimum),MTU=1500bytesYouneedtousethiscommandwhenredistributingfromanotherprotocolwithincompatiblemetricintoEIGRP.Youdonotneedthiscommandwhenredistributing:staticroutestointerfaceorconnectednetworksbetweenEIGRPprocessesR1(config-router)#default-metric1000010025511500RedistributingintoEIGRPRedistributeOSPF1routingprocessupdatesintoEIGRPAS100andoverwritethedefaultmetric.Example:RedistributingintoOSPF-BeforeRedistributionExample:ConfiguringRedistributionatRouterR2Example:RoutingTablesAfterSummarizingRoutesandRedistributionsRouteSourceDefaultDistanceConnectedinterface0Staticroute1EIGRPsummaryroute5ExternalBGP20InternalEIGRP90IGRP100OSPF110IS-IS115RIPv1,RIPv2120ODR160ExternalEIGRP170InternalBGP200Unknown255AdministrativeDistanceAdministrativedistance(AD)isawayofrankingthetrustworthinessofroutinginformation.Aloweradministrativedistancemeansarouteismoretrustworthy.AdministrativeDistanceExampleFromR1toR6:RIP(AD120)willchooseR1-R4-R6OSPF(AD110)willchooseR1-R2-R3-R5-R6EIGRP(AD90)willchooseR1-R2-R3-R5-R6StepstoConfigureRedistributionUsingAdministrativeDistanceEnterrouterconfigurationmodeConfiguretheredistributionfromanotherroutingprotocolModifytheadministrativedistanceRememberthattheconfigurationisdifferentfordifferentroutingprotocolsdistanceospfexternal100inter-area100intra-area100R1(config-router)#ModifyingAdministrativeDistanceUsedforOSPFtodefinetheexternal,interarea,andintra-areadistanceUsedforEIGRPtodefinetheinternalandexternaldistanceUsedforBGPtodefineexternal,internal,andlocaldistancedistanceeigrp90170R1(config-router)#distancebgp20200200R1(config-router)#ModifyingAdministrativeDistance(Cont.)ThedistanceeigrpcomandisusedforEIGRPprotocol.Thedistance(IP)commandisprotocol-independentUsedtodefineanadministrativedistanceforroutesthatareinsertedintotheroutingtableUsedforallprotocols,exceptforEIGRP,OSPF,andBGPwhenthededicated,protocol-specificdistancecommandsareused.ModifyingAdministrativeDistance(Cont.)ThedistanceospfcomandisusedforOSPFprotocol.Thedistance(IP)commandisprotocolindependent.Usedtodefineanadministrativedistanceforroutesthatareinsertedintotheroutingtable.Usedforallprotocols,exceptforEIGRP,OSPF,andBGPwhenthededicated,protocol-specificdistancecommandsareused.Example:RedistributionUsingAdministrativeDistanceExample:RedistributionUsingAdministrativeDistance(Cont.)Example:RedistributionUsingAdministrativeDistance(Cont.)Example:RedistributionUsingAdministrativeDistance(Cont.)Example:RedistributionUsingAdministrativeDistance(Cont.)Simpleredistributionresultsinaloopafterarouteislost.Topreventroutingloopsuseroutemapswith:RedistributionofinternalroutesonlyRoutetaggingRedistributiontoPreventRoutingLoopsSolutionWithRouteTaggingRedistributionWithTaggingVerificationRoutingtablebeforetaggingRedistributionWithTaggingVerification(Cont.)RoutingtableaftertaggingisappliedtorouterR1SummaryRedistributionsupportsallroutingprotocols.Additionally,staticandconnectedroutescanberedistributedtoallowtheroutingprotocoltoadvertisetherouteswithoutusinganetworkstatementforthem.Administrativedistance(AD)isawayofrankingthe

trustworthinessofroutinginformation.Aloweradministrativedistanceindicatesthatarouteismoretrustworthy.Thedistance(IP)commandconfigurestheadministrativedistanceperspecificnetworkinsertedintoroutingtabl