Question:(Hopesomeonewillcontributethedetailedrequirementofthissim!)SomeinformationIhavegatheredsofar:R2isanASBRforEIGRP100andOSPFAREA24R3isanASBRforEIGRP100andOSPFAREA[note:sothereareTWOseparateareasonTWOseparateASBRSthusyouneedtodoredistributiononR2andR3R1isONLYinEIGRP100,andisTHEONLYrouteryoucanfrom.R4hasaloopbackinterfacethatmustbeedfromR1.R4isrunningOSPFandhasredundantlinktoEIGRPnetworkoverR3router.Notice:YoushouldmakeafromR1tonetworktomakesureeverythingisworkingcorrectly.ThankstoPOONAMwhosendusthetopologyandconfiguration.Hegot100%onEIGRP-OSPFlabsothissolutionisperfect!Pleasesaythanktohimandotherswhocontributethislab-sim!SOLUTIONfrom-全 CCIE/JNCIEE- 微奧CCIER&SV4 ：微奧教育2013旗艦課程，CCIESP V1+100%PASS：AnswerandExFirstweneedtofindout5parameters(Bandwidth,Delay,Reliability,Load,MTU)ofthes0/0/0interface(theinterfaceofR2connectedtoR4)forredistribution:R2#showinterfaceWritedownthese5parameters,noticethatwehavetodividetheDelayby10becauseitsmetricunitistensofmicrosecond.Forexample,wegetBandwidth=1544Kbit,Delay=20000us,Reliability=255,Load=1,MTU=1500bytesthenwewouldredistributeasfollows:R2#configterminalR2(config)#routerospf1R2(config-router)#redistributeeigrp100metric-type1subnetsR2(config-router)#redistributeospf1 1(Notice:Infact,theseparametersarejustusedforreferenceandwecanuseotherparameterswithnoproblem.Also,acandidatesaidthatthesimulatordidn’taccepttheBandwidthof1544;inthatcase,wecanusealowervalue,like128.Ifthedelayis20000usthenweneedtodivideitby10,thatis20000/10=2000)ForR3weusetheshowinterfacefa0/0toget5parameterstooR3#showinterfaceForexamplewegetBandwidth=10000Kbit,Delay=1000us,Reliability=255,Load=1,MTU=1500bytesR3#configterminalR3(config-router)#redistributeeigrp100metric-type1subnetsR3(config-router)#redistributeospf1metric100001002551Finallyyoushouldtryto“showiproute”toseethenetwork(thenetworkbehindR4)intheroutingtableofR1andmakeafromR1tothisnetwork.Maybethe“copyrunning-configstartup-config”commandwillnotworkinthislabsodon’tworry,justskipit.WISHUAVERYBESTGO注意：thegreatestbandwidth這些字眼，那么基本就是要加distance，另外記得一定要show下接口！！！兩端，難點在中間；在這里假設R2和R3上已經做了雙向重發布：一，R1--AD放入路由表中，于是從OSPF學到的路由進入路由表；ADR2ODEX ---->OE1 注意：thegreatestbandwidth這些字眼，那么基本就是要加distance，另外記得一定要show下接口！！！<---->R4<---->R3<---->R2<---->R2(config-routerdistanceeigrp90109R2-R3是以太網的話就要加上這條命令R3AD109OSPF110EIGRP路由會進入R2路由表中。BasedRoutingSimAcanhastwolinkswhichcantakeittotheInternet.The demandsthatyouusewebtraffictobeforwardedonlytoFrameRelaylinkifavailableandothertrafficcangothroughanylinks.Nostaticordefaultroutingisallowed.AnswerandExNotice:TheanswerandexnationbelowarefromPeterPanandHelper.Pleasesaythanktothem!AlltheHTTPtrafficfromtheEIGRPNetworkshouldgothroughFrameRelaylinkifavailableandalltheothertrafficshouldgothrougheitherlink.TheonlyrouteryouareabletoadministrateistheBorderRouter,fromtheEIGRPNetworkyoumayonlysendHTTPtraffic.Astheotherpeoplementioned,actuallyitisnotaBGPlab.Youarenotabletoexecutethecommand“routerbgp65001″AccesslistthatcatchestheHTTPtraffic:BorderRouter#access-list101permittcpanyanyeqwwwNotethattheserverwasnotdirectlyconnectedtotheBorderRouter.TherewerealotofEIGRProutesonit.IntherealexamyoudonotknowtheexactIPaddressoftheserverintheEIGRPnetworksowehavetousethesourceas“any”tocatchallthesourceaddresses.RoutemapthatsetsthenexthopaddresstobeISP1andpermitstherestoftheBorderRouter(config)#route-mappbrpermit10BorderRouter(config-route-map)#matchipaddress101BorderRouter(config-route-map)#setipnext-hopBorderRouter(config)#route-mappbrpermit20(Notice:theroute-mappbrpermit20lineallowsothertrafficthanHTTPtoberouted.Otherwise,othertrafficwillbedropped)Applytheroute-mapontheinterfacetotheserverintheEIGRPNetwork:BorderRouter(config)#intfa0/0BorderRouter(config-if)#iproute-mappbrThereisa“HostforTesting”,clickonthishosttoopenaboxinwhichthereisabuttonJumpbacktotheBorderRouterandtypethecommand“showroute-map”.Intheoutputyouwillseetheline“routingmatches:9packets…”.Itmeansthattheroute-mapweconfiguredisworkingproperly.access-list100permittcpanyanyeq!route-mappbrpermitmatchipaddresssetipnext-hop!！route-mappbrpermit！interfaceipaddress54route-mapduplexspeed4)Thereisa“HostforTesting”,clickonthishosttoopenaboxinwhichthereisabuttonnamed“GenerateHTTPtraffic”.ClickonthisbuttontogeneratesomepacketsforHTTPtraffic.JumpbacktotheBorderRouterandtypethecommand“showroute-map”.InIntheoutputyouwillseethelineroutingmatches:9packets…”.Itmeansthattheroute-mapconfiguredisworkingIPv6OSPFVirtualLinkAcmeisasmallexport thathasanexistingenterprisenetworkthatisrunningIPv6OSPFv3.CurrentlyOSPFisconfiguredonallrouters.However,R4′sloopbackaddress(FEC0:4:4)cannotbeseeninR1′sIPv6routingtable.YouaretaskedwithidentifyingthecauseofthisfaultandimplementingtheneededcorrectiveactionsthatusesOSPFfeaturesanddoesnochangethecurrentareaassignments.YouwillknowthatyouhavecorrectedthefaultwhenR4′sloopbackaddress(FEC0:4:4)canbeseenintheroutingtableofR1.AnswerandExTotroubleshoottheproblem,firstissuetheshowrunning-configonallof4routers.PaymoreattentiontotheoutputsofroutersR2andR3Theoutputofthe“showrunning-config”commandof<output<output!Ipv6routerospf1Router-id!<outputTheoutputofthe“showrunning-config”commandof<output<output!Ipv6routerospf1Router-idArea54virtual-link!<outputWeknewthatallareasinanOpenShortestPathFirst(OSPF)autonomoussystemmustbephysicallyconnectedtothebackbonearea(Area0).Insomecases,wherethisisnotpossible,wecanuseavirtuallinktoconnecttothebackbonethroughanon-backbonearea.Theareathroughwhichyouconfigurethevirtuallinkisknownasatransitarea.Inthiscase,thearea11will ethetransitarea.Therefore,routersR2andR3mustbeconfiguredwiththearea+ConfigurevirtuallinkonR2(fromthefirstoutputabove,welearnedthattheOSPFprocessIDofR2is1):R2(config)#ipv6routerospfR2(config-rtr)#area11virtual-link(Noticethatwehavetouseneighborrouter-id,notR2′srouter-id+ConfigurevirtuallinkonR3(fromthesecondoutputabove,welearnedthattheOSPFprocessIDofR3is1andwehavetodisablethewrongconfigurationof“area54virtual-linkR3(config)#ipv6routerospfR3(config-rtr)#noarea54virtual-linkR3(config-rtr)#area11virtual-linkWeshouldchecktheconfigurationonR4#showrunning-Youwillseeawronglyconfiguredvirtual-linkcommand.TogetfullmarkwehavetothisR4#configureterminalR4(config)#ipv6routerospf1R4(config-rtr)#noarea54virtual-linkAfterfinishingtheconfigurationdon’tforgettobetweenR1andR4tomakesuretheyworkwell!Nowalltheconfigurationwasdone.Itisweirdthatwecan’ttheIPv6loopbackinterfaceofR4(withtheoripv6command)butwecancheckbyusingthecommandshowipv6routeonR1Thecopyingrunning-configstartup-configcommandwillnotworkbutdon’tworry,justskipit.Notice:Ifyouissuethecommand“showrunning-config”onR1,youwillseethesetwonopassive-interfacefa0/0(fa0/0istheinterfaceconnectingwithThesetwolinesmakealltheinterfacesofR1 epassiveinterfacesexceptinterfacefa0/0.Theyarecorrectlyconfiguredsodon’ttrytodisablethem.Notice:Ifyouissuethecommand“showrunning-config”onR1,youwillseethesetwonopassive-interfacefa0/0(fa0/0istheinterfaceconnectingwithR2)這個配置沒有問題，EIGRPStubByincreasingthefirstdistantoffice,JSmanufactureshasextendedtheirbusiness.Theyconfiguredtheremoteofficerouter(R3)fromwhichtheycanreachallCorporatesubnets.InordertoraisenetworkstablenessandlowerthememoryusageandbroadbandutilizationtoR3,JSmanufacturesmakesuseofroutesummarizationtogetherwiththeEIGRPStubRoutingfeature.Anothernetworkengineerisresponsiblefortheimplementingofthissolution.However,intheprocessofconfiguringEIGRPstubroutingconnectivitywiththeremotenetworkdevicesoffofR3hasbeenmissing.PresentlyJShasconfiguredEIGRPonallroutersinthenetworkR2,R3,andR4.YourdutyistofindandsolvetheconnectivityfailureproblemwiththeremoteofficerouterR3.YoushouldthenconfigureroutesummarizationonlytothedistantofficerouterR3tocompletethetaskaftertheproblemhasbeensolved.ThesuccessofsfromR4totheR3LANinterfaceprovesthatthefaulthasbeencorrectedandtheR3IProutingtableonlycontainstwosubnets.AnswerandExFirstwehavetofigureoutwhyR3andR4cannotcommunicatewitheachother.Useshowrunning-configcommandonrouter-全 CCIE/JNCIEE- 微奧CCIER&SV4 ：微奧教育2013旗艦課程，CCIESP V1+100%PASS：NoticethatR3isconfiguredasastubreceive-onlyrouter.Thereceive-onlykeywordwillrestricttherouterfromsharinganyofitsrouteswithanyotherrouterinthatEIGRPautonomoussystem.Thiskeywordwillalsopreventanytypeofroutefrombeingsent.ThereforewewillremovethiscommandandreceitwiththeeigrpstubR3#configureterminalR3(config-router)#noeigrpstubreceive-onlyR3(config-router)#eigrpstubNowR3willsendupdatescontainingitsconnectedandsummaryroutestootherrouters.Noticethattheeigrpstubcommandequalstotheeigrpstubconnectedsummarybecausetheconnectedandsummaryoptionsareenabledbydefault.NextwewillconfigurerouterR3sothatithasonly2subnetsofnetwork.UseshowiproutecommandonR3toviewitsroutingR3#showipBecausewewanttheroutingtableofR3onlyhave2subnetssowehavetosummarysub-networksattheinterfacewhichisconnectedwithR3,thes0/0interfaceofR4.Thereisoneinterestingthingabouttheoutputoftheshowiprouteshownabove:the/24,whichisadirectlyconnectednetworkofR3.Wecan’tgetridofitintheroutingtablenomatterwhattechniqueweusetosummarythenetworks.Therefore,tomaketheroutingtableofR3hasonly2subnetswehavetosummaryothersubnetsintoonesubnet.Intheoutputifwedon’tseethesummaryline(like/8isasummary…)thenweshouldusethecommandipsummary-addresseigrp123sothatallthecanworkwell.Inconclusion,wewillusetheipsummary-addresseigrp123attheinterfaces0/0ofR4tosummary.R4(config-if)#ipsummary-addresseigrp123NowwejumpbacktoR3andusetheshowiproutecommandtoverifytheeffect,theoutputisshownbelow:(Butpleasenoticethattheipaddressesandthesubnetmasksinyourrealexammightbedifferentsoyoumightusedifferentonestosolvethisquestion)Butinyourrealexam,ifyouseetheline“/8isasummary,….Null0″thenyouneedtosummaryusingthenetwork/8withthecommand“ipsummary-addresseigrp123″.Thisconfigurationislessoptimizethanthefirstbutitsummariesintosubnetsasthequestionrequires(maybeyouwillnotseethiscase,don’tThecommand“copyrunning-configstartup-config”willnotworksotryusingthiscommand;justskipifitdoesn’twork.R3的路由表中只有兩個/8的子網條目。OSPFisconfiguredonroutersAmaniandLynaic.Amani’sS0/0interfaceandLynaic’sS0/1interfaceareinArea0.Lynaic’sLoopback0interfaceisinArea2.YourtaskistoconfigurethePortland’sS0/0interfaceinArea1Amani’sS0/1interfaceinArea1UsetheappropriatemasksuchthatONLYPortland’sS0/0andAmnani’sS0/1couldbeinArea1.Area1shouldnotreceiveanyexternalorinter-arearoutes(exceptthedefaultAnswerandExFirst,weconfigurePortland’sS0/0interfacesothatitbelongstoArea1.So,wehavetofindoutwhichsub-networktheIPaddress/30(theIPofinterfaceS0/0ofPortland)belongsto.Thisaddressbelongstoasubnetworkwhichhas:Increment:4(/30=52or11111111.11111111.11111111.1111Networkaddress:(because4=4*1and4<Broadcastaddress:(because7=4+4–1)(Itisnotnecessarytofindoutthebroadcastaddressbutweshouldknowit)ThequestionrequiresthatonlyPortland’sS0/0andAmani’sS0/1couldbeinArea1,thereforewemustuseawildcardof(thiswildcardisequivalentwithasubnetmaskof/30)sothatthereareonly2IPaddressescanparticipate