Zte ZXR10 5900E Series - MAC Address Table Configuration

Chapter3OSPFConguration
lBackbonerouter
Arouterthatitsoneinterfacebelongstoarea0atleast.
lABR
Arouterthatitsoneinterfacebelongstoarea0atleastandoneinterfacebelongsto
otherareaatleast.
AllABRsarebackbonerouters.
lAutonomousSystemBorderRouters(ASBR)
Therouterhasotherroutingprotocols,suchasstaticroute,interfacedirectrouteand
RIP ,IGRPandsoon.
Theadvantagesofareadivisionarelistedbelow:
lSinceABRgeneratesLSAsaccordingbyusingroutesinitsareaafterdividingareas,
theroutescanbeaggregatedrstlyaccordingtotheruleofIPaddresses,andthen
generateLSAs.Inthisway,thenumberofLSAsisreducedalotinAS.
lAftertheareaisdivided,thechangingofnetworktopologyissynchronizedinthearea
rstly.Ifthechanginginuencesontheaggregatedroute,ABRwillnotifythechanging
tootherareas.Inthisway,mostoftopologychangingsareshieldedinthearea.
LSATypeandFlooding
LSAisamodeofexchanginglinkstatedatabaseinformationamongOSPFrouters.A
routerusesLSAstoconstructanaccurateandcompletenetworkdiagramandgenerates
theroutesusedinitsroutingtable.ZXR105900Esupportsthefollowingeighttypesof
LSAs.
lType1:RouterLSA
ItisthebasicLSA.EveryOSPFroutergeneratesaRouterLSA.RouterLSAisusedto
describetheinformationoftheinterfacerunningOSPFonrouter,suchasconnection
status,costandsoon.AnABRgeneratesaRouterLSAforeveryarea.ARouter
LSAistransmittedinthewholeareaatwhereitlocates.
lType2:NetworkLSA
TheNetworkLSAisgeneratedbyDR.ForabroadcastorNBMAnetwork,toreduce
thetimesofpacketexchangingbetweenroutersinanetworksegment,theconcept
ofDRisadvanced.WhenaDRexistsinanetworksegment,notonlythemethod
ofpacketssendingischanged,butalsothedescriptionoflinkstateischanged.The
RouterLSAgeneratedbyaDROtherorBDRonlydescribestheconnectionfromitself
toaDR.While,DRusestheNetworkLSAtodescribeallrouterswhichalreadyset
upadjacentrelationshipswithitselfinthenetworksegment(itliststheRouterIDsof
adjacentrouters).ANetworkLSAistransmittedinthewholeareaatwhereitlocates.
lType3:NetworksummaryLSA
NetworksummaryLSAsaregeneratedbyABRs.WhenaABRnishesrouting
calculationintheareaatwhereitlocates,itenquirestheroutingtableand
encapsulateseachOSPFrouteintoaNetworkSummaryLSA.TheNetwork
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SJ-20150114102049-003|2015-01-15(R1.0)ZTEProprietaryandCondential