ccnp教學視頻dennis版spoto-課件12ospf

1、正式版。Copyright2009 .Nopartofmaybereproduced正式版。Copyright2009 .Nopartofmaybereproducedortransmittedinanyformorbyanymeanswithoutpriorwrittenconsentof修修訂日修訂版本審核修訂說2014-03-正式發(fā)思科認證是由網絡領域著名的廠商Cisco公司推出的，是互聯(lián)網領域的國認證iscoCertifiedNetworkal)是 Cisco 職業(yè)認證體系中的中思科認證是由網絡領域著名的廠商Cisco公司推出的，是互聯(lián)網領域的國認證iscoCertifiedNetwo

2、rkal)是 Cisco 職業(yè)認證體系中的中級認證獲得CCNP認證?？梢詾榫哂?00到500多個節(jié)點的大型企業(yè)網絡安裝、配置和運行LAN、WAN和撥業(yè)務CCNP認證表示網具有對從100個節(jié)點到超過500個節(jié)點的融合式局域網和廣域網進行安裝、配和排障的能力。獲得CCNP認證資格的網擁有豐富的知識和技能，能夠管網的路由器交換機，以及將語音、無線和安全集成到網絡之中的邊緣應用SPOTOCCNP認,它是由 SPOTO TS 團隊為廣大學員精心設計的一輔,它以 CCNP 知識點為基礎,經過縝密的思考,大量的實踐,多,最終撰寫完這份手冊,旨在為學員在 CCNP 學習過程中提供參考,加深對 CCNP課程理論

3、的理解,并能更快更熟練的用網絡技術CCNP最終由目前發(fā)布PV1.0 是 SPOTO TS 團隊共同努力的結晶,、TS建華以及進行后期整理、排版工歡迎大家積極反饋意見,以便持續(xù)更新111.21.2.1OSPF1.2.2OSPF文類1.2.31.21.2.1OSPF1.2.2OSPF文類1.2.3置1.2.4OSPF絡類1.2.5 Link-e1.2.6OSPF由匯1.2.7置OSPF區(qū)1.2.8置OSPF1.2.9OSPF識點1.2.10OSPF1.2.1 OSPF簡鏈路狀態(tài)路由協(xié)1.2.1 OSPF簡鏈路狀態(tài)路由協(xié)鏈路狀態(tài)數(shù)據(jù)結網絡層次結SPF運行鏈路狀態(tài)路由協(xié)議運行鏈路狀態(tài)路由協(xié)議的路由器比

4、運行距離矢量路由協(xié)議的路由器識每一臺路由器擁有整個拓撲結能夠根據(jù)準確的網絡拓撲信息獨立地作出決的網絡信鄰居表鄰居表拓撲表通常被稱為鏈路狀態(tài)數(shù)據(jù)庫L路由表通常稱為轉發(fā)數(shù)據(jù)庫（forwardingdatabase）鏈路狀態(tài)路由協(xié)議通過OPF鏈路狀態(tài)路由協(xié)議通過OPF中轉區(qū)域(骨干區(qū)域常規(guī)區(qū)域 (非骨干區(qū)域OSPFOSPF區(qū)域特點OSPFOSPF區(qū)域特點最大限度地減少路由表條本地區(qū)域內拓撲變化的影在區(qū)域邊LSA需要分層網絡設路由器C，D和EABR連接著骨干區(qū)域和非SPFAme alllinks SPFAme alllinks are Ethernet, n OSPF cost of 1.1.2OSP

5、FOSPF1.1.2OSPFOSPF 鄰居建立過LSALSAOSPFOSPFOSPF!0OSPF 2OSPF!0OSPF 2&( + IP) !,IP-鄰居關系鄰居關系OSPF建立鄰接關系的過程詳細描述(補充OSPF路由器接口up，發(fā)OSPF路由器接口收o包，（NBMA模式時將進入Attempt狀態(tài)）o包，進入Init狀態(tài)；OSPF建立鄰接關系的過程詳細描述(補充OSPF路由器接口up，發(fā)OSPF路由器接口收o包，（NBMA模式時將進入Attempt狀態(tài)）o包，進入Init狀態(tài)；并將o包的發(fā)送者的Router ID，添加o包（自己將要從該接口發(fā)送出去o包）的鄰居列表中(3) OSPF路由器接口

6、收到鄰居列表中含有自己Router IDo包，進入Two-way狀態(tài)，形OSPF鄰居關系，并把該路由器的Router ID添加到自己的OSPF鄰居表中(4) 在進入Two-way狀態(tài)后，廣播、非廣播網絡類型的鏈路，在DR等待時間內進行。(5) 在完成或跳過后，建立OSPF鄰接關系，進入exstart（準啟動）狀態(tài)；DBD交換主從路由器，以及由主路由器定義DBD序列號，Router ID大的為主路由器。目的是了解決DBD自身的可靠性(6) 主從路由完成后，進入Exchange（交換）狀態(tài)，交換DBD(7) DBD交換完成后，進入Loading狀態(tài)，對鏈路狀態(tài)數(shù)據(jù)庫和收到的DBD的LSA現(xiàn)自己數(shù)據(jù)

7、庫中沒有的LSA就發(fā)送LSR，向鄰居請求該LSA；鄰居收到LSR后，回應LSU；收鄰居發(fā)來的這些LSA到自己的鏈路狀態(tài)數(shù)據(jù)庫，并發(fā)送LSAck(8) LSA交換完成后，進入FULL狀態(tài)，所有形成鄰居的OSPF路由器都擁有相同鏈路狀態(tài)數(shù)據(jù)(9定期發(fā)o鄰居關系RouterAnotifiesRouterAnotifiesallOSPFDRsonDRnotifiesotherson在LSDB中每一條一個序列號序列在LSDB中每一條一個序列號序列號的長度為4個字節(jié)，范圍是 0 x80000001 OSPF每隔30分鐘泛洪每一條LSA以保持適當?shù)臄?shù)據(jù)庫同步每次LSA泛洪，序列號被加最終，一個LA序列號將返

8、回到0 x80000001的。當發(fā)生這種情況時，現(xiàn)有的LA達到最大老化時間，重新刷新LSA當路由器遇到一個LA的兩個實例，它必須確定哪個更新。具有較新的（更高）的A的LLSALSAEvery OSPF router arouterLSAfortitEvery OSPF router arouterLSAfortithatRouter with link ID 192.168.1.67 has been updated eight the last update was 48 seconds DebugofasingleShowsfieldsinOSPFR1#debug ipf packet O

9、SPFpacketdebuggingison*Feb1611:03:51.206:OSPF:rcv.v:2t:1l:48aid:0.0.0.1chk:D882aut:0auk:fromRTC#showpfOSPF Router with ID (192.168.1.67) (ProsID10) Router Link Ses (Area 1)Link IDADV RouterAge Seq#Checksum Linkcount 2120 x80000006output1.2.3配置 配置1.2.3配置 配置OSPF Router-BasicEnablesoneormoreOSPFrouting

10、DefinestOSPFwill BasicEnablesoneormoreOSPFroutingDefinestOSPFwill runOptionalmethodtoenableOSPFexplicitlyonCiscoIOS().pf s-id area area-id secondaries network ip-address wildcard-mask area area-router ospf s-id-OSPFRouter 在OSPF網絡內通過OSPF router ID標識路由器LSDBs使用OSPFRouterID區(qū)分OSPFRouter 在OSPF網絡內通過OSPF ro

11、uter ID標識路由器LSDBs使用OSPFRouterID區(qū)分不同的路由器默認情況下, Router ID在OSPF進程啟動時選擇活動接口中最大的IP地址環(huán)回接口可以參與OSPF路由器ID，如果存在ack接口，路由器ID是在任何活的ack接口中最大的IP地址OSPF的Router-id命令可以用來覆蓋OSPF路由器ID使用ack接口或一個Router-id命令用于保持Router-ID穩(wěn)定IftheOSPFsisalreadyrunning,theroutermustreloadedortheOSPFsmustberemovedreconfiguredbeforethenewackaddr

12、esswilltakeerfaceackRouter(config-if)#ipaddress172.16.17.5OSPFrouter-dRouter(config-disconfiguredundertherouterospfAnyuniquearbitraryOSPFrouter-dRouter(config-disconfiguredundertherouterospfAnyuniquearbitrary32-bitvalueinanIPaddressformat (dotted decimal) can be used.IfdisusedonanOSPFstisactive,then

13、thenewrouterIDisusedafterthenextreloadmanualOSPFsrestartRouter(config)#routerospfRouter(config-router)#router-id172.16.1.1 Router#clear ipf proclearpfrouter-idip-1.2.4OSPFNetwork-to-1.2.4OSPFNetwork-to-OSPFoverNBMATopologyOSPFNetwork ThethreetypesofnetworksdefinedbyOSPF-to-:AtOSPFNetwork Thethreetyp

14、esofnetworksdefinedbyOSPF-to-:Atjoinsasinglepairof Broadcast: A multiac Nonbroadcastmultiacntworouterssbroadcastnetwork,suchass(alsocalledNBMA):Aterconnectssnobroadcastcapability.FrameRelay,ATM,andarelesofNBMAFivemodesofOSPFoperationareavailableforNBMA-to-UsuallyaMayalsobeaerfacerunningPPor-to-to-Us

15、uallyaMayalsobeaerfacerunningPPor-to-erfacerunningFrameRelayorNoDRorBDRelectionOSPFautodetectserfaceOSPFpacketsaresentusingmulticastsBroadcast Generallytheseare,LANsBroadcast Generallytheseare,LANtechnologieslikeEthernetandTokenRing. DR and BDR selection are required.Allneighborroutersformfulladjace

16、ncieswiththeDRandBDRonly. Packets to the DR and the BDR use 224.0.0.6.PacketsfromDRtoallotherroutersuseElectingtheDRandopacketsElectingtheDRandopacketsareexchangedviaIPThe router with the highest OSPF priority i second-highestpriorityvalueistheBDR.UsetheOSPFrouterIDastheTheDRelectionisectedastheDR.T

17、herouterwithSettingPriorityfor DRRouter(config-erfacedassignstheOSPFprioritytoSettingPriorityfor DRRouter(config-erfacedassignstheOSPFprioritytoonaroutermaybeassigneddifferentThedefaultpriorityis1. Therangeisfrom0to0meanstheroutercannotbetheDRorAtisnottheDRorBDRispfpriorityAerconnectsmultiplepportmu

18、ltiplerouters,butAerconnectsmultiplepportmultiplerouters,butwithoutbroadcastingNBMA OSPFconsidersNBMAtobelikeotherbroadcastTheDRandBDRneedtohavefullymeshedconnectivitywi networks are not always fully meshed.TheDRandBDRneedalistofllotherrouters,butOSPFneighborsarenotautomaticallydiscoveredbytheFrameR

19、elayFrameRelayOSPFoverNBMATopologyModesofpliantmodesareasOSPFoverNBMATopologyModesofpliantmodesareas-to-AdditionalmodesfromCiscoareasfollows(Cisco私有-to-to-SelectingtheOSPFNetworkTypeforNBMASelectingtheOSPFNetworkTypeforNBMARouter(config-DefinesOSPFnetworkle:Broadcasterial 0/0/0 Router(config-if)#enc

20、apsulationframe-relay pfnetworkpf network broadcast | non-broadcast | ponon-broadcast | po1-NonbroadcastMode(NBMARouter(config-Used1-NonbroadcastMode(NBMARouter(config-Usedtoically define neighbor relationships in an neighborip-addressprioritynumbernumbercostnumberdatabase-filterd RouterA(config)# r

21、outer ospf d RouterA(config)# router ospf RouterA(config-router)# network 192.168.0.0 0.0.255.255 area RouterA(config-router)# neighbor 192.168.1.2 priority RouterA(config-router)# neighbor 192.168.1.3 priority RouterA(config-router)# network 172.16.0.0 0.0.255.255 area 2-to-Router TheThe-to-to-mode

22、allowsforNBMAmode2-to-Router TheThe-to-to-modeallowsforNBMAmodefixespartial-meshandNoDRisrequiredandonlyasinglesubnetisA30-oisThismodeisRouteripaddress192.168.1.3encapsulation frame-pf network popf priority 0ipaddress192.168.1.1encapsulation frame-pfnetwork-to-outputrouterospflog-adjacency-network17

23、2.16.0.00.0.255.255areanetwork192.168.0.00.0.255.255area3-to-Ciscopliant-to-MustLikeicallydefineneighbors,likenonbroadcast-to-mode,DR3-to-Ciscopliant-to-MustLikeicallydefineneighbors,likenonbroadcast-to-mode,DRandBDRUsedinl cases where neighbors cannot be automatically Thephysicalserialesmultiplelog

24、icalEach erfacerequiresanIPerial number.suberface-number multipo4-to-PVCs are treated like -to-Each erfacerequiresaEachPVCandSVCgetsitsown4-to-PVCs are treated like -to-Each erfacerequiresaEachPVCandSVCgetsitsownDefault OSPF -to-.OSPF-to-modeisthedefaulton-to-FrameRelayNo.Donot need toconfigure eria

25、lerface-to-5-one Each erial 0/0/0 has been logically o two:-to-(S0/0/0.1) and one -to-erface requires a OSPF defaults to 5-one Each erial 0/0/0 has been logically o two:-to-(S0/0/0.1) and one -to-erface requires a OSPF defaults to -to-mode on -to-.OSPF defaults to nonbroadcast mode on -to-.MultipleP

26、VCsandSVCsareonasingleDefaultOSPFOSPFnonbroadcastmodeistheDRandBDRareNeighbors needtobe icallyerialOSPFoverNBMATopologyOSPFNBMA Preferred Subnet Full or partial 10Automatic, DR/BDR OSPFoverNBMATopologyOSPFNBMA Preferred Subnet Full or partial 10Automatic, DR/BDR Full or partial 30configuration,DR/ B

27、DR electedor star30noor star30configuration,no/ -to-Partial-mesh or star, using subDifferent for Each 10no1.2.5Link-eOSPF由Virtual1.2.5Link-eOSPF由VirtualLSAOSPF 路由條目類OSPF LSA過載保TypesofOSPF123TypesofOSPF1234.DefiningVirtual虛擬鏈路被用DefiningVirtual虛擬鏈路被用于一個不連續(xù)的區(qū)域連接到區(qū)域0邏輯連接是建立路由器A和路由器B虛擬鏈路用于備份或臨時連接Configur

28、ingVirtualRouter(config-CreatesaConfiguringVirtualRouter(config-Createsavirtualremoterouter#shRoutingsospf1000withIDSupportsonlysingleTOS(TOS0)routes Supports opaque LSASupportsLink-localSignaling(LLS) Supports area transit capabilityItisanareaborderoutputareaarea-idvirtual-linkrouter-idauthenticati

29、on message-digest | null erval seconds erval seconds transmit-delay secondsdead-erval seconds authentication-keykey|message-digest-keykey-idmd5 OSPFVirtualLinkConfigurationOSPFVirtualLinkConfigurationTheshowpfvirtual-dTheshowpfvirtual-dRouterA#sh pf virtual-VirtualLinkOSPF_VL0torouter10.2.2.2isup Ru

30、n as demand circuitDoNotAge LSA Transit area 1, viaerial0/0/1,Costofusing781 Transmit Delay is 1 sec, Se POervals configured,o 10, Dead 40, Wait 40, Retransmit 5 o due in 00:00:07Adjacency e FULL o Index1/2,queuelength0,numberof0 x0(0)/0 x0(0)NextLast scan length is um is Last retransmisis 0 msec,um

31、is0msec LSALSA12Network3orSummary LSALSA12Network3orSummary 5Autonomoussystem external LSAs6MulticastOSPF 7Definedfornot-so-stubby8External attributes LSA for BorderGatewayProtocol(BGP)9,10,Opaque LSAType1:RouterOneLSAType1:RouterOnerouterLSA(type1)foreveryrouterinanarea Includes list of directly at

32、tached linksEachlinkidentifiedbyIPprefixassignedtolinkandlinktype Identified by the router ID of the originating routerFloodswithinitsareaonly;doesnotcrossLSAType2:NetworkOnenetwork(typeLSAType2:NetworkOnenetwork(type2)LSAforeachtransitbroadcastorNBMAnetworkinanIncludeslistofattachedroutersonthetran

33、sitbnetmaskofAdvertisedbytheDRofthebroadcastFloodswithinitsareaonly;doesnotcrossLSAType3:SummaryType LSAType3:SummaryType 3 LSAs 用用于將本區(qū)域產生的LSA 信息泛洪道其它區(qū)-描述鏈路的網絡號和掩碼由起始區(qū)域的ABRType 3 LSAs被其它的ABR泛洪到整個自治系統(tǒng)默認情況下，路由不進行匯總。類型3 LSA將通告到每個子網LSAType4:SummarySummary(typeLSAType4:SummarySummary(type4LSAsare被用于在Type

34、 4 LSA 由原始區(qū)域的ABR產生系統(tǒng)向其它區(qū)域通告Type 4 LSA 被其它的ABR泛洪到整個自治系統(tǒng)Type4LSAs包含ASBR的RouterIDLSAType5:ExternalExternal(typeLSAType5:ExternalExternal(type5LSAs被用來通告來自其他自治系統(tǒng)網絡Type 5 LSA 始源于ASBR產生并由ASBR通Type5LSAs在整個自治系統(tǒng)泛洪在整個自治系統(tǒng)泛洪中，通告的routerIDASBR不變。默認情況下，路由不進行匯總retingtheRoutingTable:TypesofOOSPF retingtheRoutingTabl

35、e:TypesofOOSPF ra-area (routerLSA)and network LSANetworks from withheareaofthe AdvertisedbywayofrouterLSAsand network LSAO(summaryNetworksfromoutsidetheareaofthe router, but withhe OSPF autonomous systemAdvertisedbywayof summary LSAsOType1externalNetworksoutsideoftheautonomous system of the routerAd

36、vertisedbywayofexternalOType2externalCalculatingCostsforCalculatingCostsforE1andE2OSPFLSDBRouter(config-max-um-number threshold-percentage warning-ignore-ignore-count-OSPFLSDBRouter(config-max-um-number threshold-percentage warning-ignore-ignore-count-reset-time通過其他路由器生成的LSA過多可能會耗盡本地路由器資源這個特性能夠限制不是自

37、己生成的um-number:不是自己產生的ignore-time minutes:超過最大LSA數(shù)量限制后,忽略所有鄰居的時間,默認為5分鐘. ignore-count count-number:指定OSPF進程可連續(xù)進入忽略狀態(tài)的次數(shù),默認為5次.reset-time minutes:指定多長時間后將忽略計數(shù)器重置為0,默認為10分鐘ChangingtheCostDijkstrasalgorithmdeterminesthebestpathbyaddingallChangingtheCostDijkstrasalgorithmdeterminesthebestpathbyaddingalll

38、ink costsalongaThecost,ormetric,isanindicationoftheoverheadtosendpacketsoverDefault=(100Mbps)/Overridesthedefaultcostcalculation.Valuesfrom1to65535canbeSetsthereferencebandwidthtovaluesn100Mbps(legalvaluesrange1toegabitsperauto-costreference-bandwidthref-pf erface-1.2.6OSPF匯總好1.2.6OSPF匯總好配置OSPF由匯配置O

39、SPF認路BenefitsofRoute MinimizesnumberofBenefitsofRoute MinimizesnumberofroutingtableLocalizesimpactofatopologyLSAtype3and5floodingandsavesCPUUsingRouteerUsingRouteerareasummarylinkcarriesOneormoreentriescanrepresentseveralConfiguringRoute Router(config-erarearoutesonanConfiguringRoute Router(config-e

40、rarearoutesonanRouter(config-Consolidatesexternal routes,usuallyonanddress ip-address mask not-advertise tag area area-id range address mask advertise | -advertise cost RouteSummarizationConfigurationRouteSummarizationConfigurationleatRouteSummarizationConfigurationRouteSummarizationConfigurationlea

41、tDefaultRoutesinAdefaultrouteisoOSPFasanexternalLSAtypeDefaultRoutesinAdefaultrouteisoOSPFasanexternalLSAtypeDefaultroutedistributionisnotonbydefault;usethedefault-informationdundertheOSPFroutingRouter(config-Normally,routealreadydadvertisesa0.0.0.0heroutingotheOSPFnetworkonlyiftheThealwayskeywordal

42、lowsthe0.0.0.0defaulttobeadvertisedevenwhenthedefaultroutenotheroutingdefault-informationoriginatealwaysmetricmetric-valuemetric-typetype-value route-map map-nameDefaultRouteConfigurationDefaultRouteConfiguration配置 OSPFTotally 配置 OSPFTotally NSSA Totally TypesofTypesofStubandTotallyStubAreaAnareacan

43、bestuborStubandTotallyStubAreaAnareacanbestubortotallystubThereisasingleABR,orifthereisnoneABR,suboptimalroutingpathstootherorexternalautonomoussystemsareAllheareaareconfiguredasstubThereisnoheTheareaisnotareaNovirtuallinksgothroughthearea. There is no LSA5.UsingStubExternalLSAsareUsingStubExternalL

44、SAsareDefaultrouteisostubareabytheAllroutersinarea50must beconfiguredasStubArea RouterA(config-dturnsonstubareaAllroutersStubArea RouterA(config-dturnsonstubareaAllroutersinastubareamustusetheRouterA(config-stubddefinesthecostofadefaultrouteo Thedefaultcostisareaarea-iddefault-costareaarea-idstubno-

45、OSPFStubAreaConfigurationOSPFStubAreaConfiguration UsingTotallyStubbyExternal LSAs are stopped. SummaryLSAsarestopped.Routing table is reduced to a minimum. All routers must be configured as stub. UsingTotallyStubbyExternal LSAs are stopped. SummaryLSAsarestopped.Routing table is reduced to a minimu

46、m. All routers must be configured as stub. ABRmustbeconfiguredastotallystubby.ThisisaCiscoproprietaryRouterA(config-areaarea-idstubno-TotallyStubbyConfigurationTotallyStubbyConfigurationNSSAbreaksstubareaASBR(R1)isallowedinNSSAbreaksstubareaASBR(R1)isallowedinlLSAtype7defined,sentbyABR(R2)convertsLS

47、Atype7toLSAtypeABRsendsdefaultoNSSAinsteadofexternalroutesfromotherNSSAisanRFCRouterA(config-areaarea-idnssaRouterA(config-areaarea-idnssano-redistributiondefault-information-metric-metric-type-valueno-使用此命令定義區(qū)域為NSSA關鍵字no-summary 用于創(chuàng)建一個NSSA完全末節(jié)區(qū)域; 這是Cisco的私有特效le:NSSA以一le:NSSA以一個7類的LSA發(fā)布一條默認路由NSSATot

48、allyStubbyNSSATotallyStubbyNSSAtotallystubbyareaisaCiscoproprietary以一個3類的LSA發(fā)布一條默認路由ds forStuband Displayswhichareasarenormal,ds forStuband Displayswhichareasarenormal,stub,orDisplaysdetailsofDisplaysspecificdetailsofeachLSAtype7updateinDisplaysallshowipshowpfdatabasenssa-showpfshow1.2.8配置 OSPF1.2.8

49、配置 OSPFOSPFAuthenticationOSPF支持2種認證類型OSPFAuthenticationOSPF支持2種認證類型Simplepassword(orMD5ext)路由器生成并檢查每一個OSPF報文。路由器驗證它接收每個路由文的源配置一個“密鑰）;每個參與的鄰居必須配置相同的密鑰ConfiguringOSPFSimple PasswordswordtobeusedwithConfiguringOSPFSimple PasswordswordtobeusedwithneighboringSpecifiestheauthenticationtypeforan (since Cis

50、co IOS software 12.0)Specifiestheauthenticationtypefor anarea (wasinCisco IOS software before 12.0)areaarea-idauthenticationmessage-pfauthenticationmessage-digest|pfauthentication-keyleSimplePasswordAuthenticationleSimplePasswordAuthentication erface Loip address 10.2.2.2 outputip address 192.168.1.

51、102 pf pf authentication-key router ospf 10log-adjacency-network 10.2.2.2 0.0.0.0 area network 192.168.1.0 0.0.0.255 area ConfiguringOSPFMD5Router(config-AssignsakeyIDandkeyConfiguringOSPFMD5Router(config-AssignsakeyIDandkeyto beusedwithneighboringRouter(config-Specifiestheauthenticationtypeforan (s

52、ince Cisco IOS software 12.0)Router(config-Specifiestheauthenticationtypeforanarea(wasinCisco IOS software before 12.0)area area-id authentication message-pf authentication message-digest | pf message-digest-key key-id md5 leMD5AuthenticationleMD5Authentication erface Loip address 10.2.2.2 outputip

53、address 192.168.1.102 pf authentication message-pf message-digest-key 1 md5 router ospf 10log-adjacency-network 10.2.2.2 0.0.0.0 area network 192.168.1.0 0.0.0.255 area TroubleshootingSimplePasswordAuthenticationSimpleTroubleshootingSimplePasswordAuthenticationSimpleauthenticationonR1,noauthenticationonSimpleauthenticationonR1andR2,butdifferent *Feb1718:54:01.238:OSPF:Rcvpktfrom192.168.1.102,Serial0/0/1: Mismatch Authentication Key - Clear Text*Feb1718:53:13.050:OSPF:Rcvpktfrom192.168.1.101,Serial0/0/1: Mismatch Authentication Key - Clear Text*Feb 17 18:51:31.242: OSPF: Rc