Zte ZXR10 T600

Chapter6OSPFv3Conguration
TheIPv6OSPFrunsovertheIPv6directly.Addressseman-
temeisnotcontainedintheOSPFheaderbutinthedifferent
LSAtypes.Therefore,theIPv6OSPFisindependentofnet-
workprotocols.ThefollowingarechangesoftheOSPFpacket
format:
�TheOSPFversionnumber3now.
�OptionseldsoftheHellopacketandthedatabasedescrip-
tionpacketareexpandedto24bits.
�Theauthenticationandauthenticationtypeeldsare
deletedfromtheOSPFheader .
�TheHellopacketdoesnotcontaintheaddresssemanteme
butcontainsaninterfaceIDusedbyroutertoidentifythe
link.IftherouterbecomestheDRinthelink,theinterface
IDwillbethelinkstateIDofthenetworkLSA.
�ToprocesstherouterLSAduringtheSPFcalculation,the
twooptionsbitsofRandV6areaddedtotheoptionselds.
TheOSPFheadercontainsanInstanceID,thusallowing
runningmultipleOSPFprotocolinstancesoverasinglelink.
�ThechangingofLASformat.
AlltheaddresssemantemearedeletedfromtheLSAheader ,
routerLSAandnetworkLSA.ThetwoLSAsdescribethetopol-
ogyoftheroutingdomaininawayindependentofnetwork
protocols.Apartfromthis,thenewLSAforadvertisingIPv6
addressinformationandthedatarequiredforresolutionofthe
nexthopareadded.
Type-3LSAisrenamedintra-areaprexLSAandType-4LSA
intra-arearouterLSA.
�OSPFv3ProcessesunknownLSAtype.
InIPv6,theunknownLSAtypescanberegardedashavingthe
locallinkoodingrange,orberegardedastheknownLSAtype
forsavingandooding.TheIPv4OSPFdiscardstheunknown
LSAtypessimply.
�OSPFv3supportsstubarea
InOSPFv3,stubareacanonlyprocessrouterLSA,network
LSAandintra-areaprexLSA.Stubareaallowstheunknown
LSAstobesavedandoodedasknownLSAs.
�OSPFv3identiesneighborbyrouterID.
InOSPFv3,theneighborroutersonadesignatedlinkareiden-
tiedbytheirOSPFrouterIDs.InOSPFv2,theneighborson
point-to-pointnetworksandvirtuallinksareidentiedbytheir
routerIDs,whilethoseonbroadcast,NBMAandpoint-to-mul-
tipointlinksareidentiedbyinterfaceaddresses.
LSAType
LSAistheunittoconstructOSPFv3linkstatedatabase.Router
adoptsLSAstoformacompletenetworktopologyandthusto
generateroutingtable.OSPFv3hasthefollowingtypesofLSAs.
�RouterLSA
CondentialandProprietaryInformationofZTECORPORATION35