Zte ZXR10 ZSR V2 - Table 2-2 Aggregatable Global Unicast Address Fields

Chapter2IPv6AddressConguration
TherearenotwonetworkinterfacecardswithanidenticalMACaddress.Suchaddresses
canbeusedtouniquelyidentifytheinterfacesatthenetworklink-layer.
TheinterfaceidentierofanIPv6hostaddressisbasedontheInstituteofElectricaland
ElectronicsEngineers(IEEE)EUI-64format,whichcreatesalocallyandgloballyunique
64-bitinterfaceidentierbasedontheexistingMACaddresses.
These64-bitinterfaceidentierscanaddressonebyonegloballyandcanuniquelyidentify
theinterfaceofeachnetwork.Thismeansthat,intheory,thereareupto264different
physicalinterfacesandabout1.8x1019differentaddresses,which,however,onlyoccupy
halfoftheIPv6addressspace.Itisenoughintheforeseeablefutureatleast.
TheIPv6unicastaddresscanbeclassiedintothefollowingcategories:
lAggregatableGlobalUnicastAddress
Thisisanotherkindofaggregation,whichisindependentofanInternetService
Provider(ISP).Theprovider-basedaggregatetiveaddressesmustbechangedas
aproviderchanges,whiletheexchange-basedaddressesaredirectlylocatedby
anIPv6switchingentity.Theexchangeprovidesaddressblocks,andusersand
providersconcludecontractsforthenetworkaccess.
Suchnetworkaccessiseitherdirectlyprovidedbyaprovider,orindirectlyprovided
byanexchange.However,theroutingisthroughtheexchange.Inthisway,auser
needsnottoaddressagainwhenitchangesaprovider.Atthesametime,usersare
allowedtousemultipleISPstoprocesssingle-blocknetworkaddress.
Aggregatableglobalunicastaddressesincludealltheaddresseswhosethreestarting
bitsare001,whichcanbeusedasprexesforotherunallocatedunicast.Table2-2
liststheaggregatableglobalunicastaddresselds.
Table2-2AggregatableGlobalUnicastAddressFields
3138241664
FPTLAIDRESNLAIDSLAIDInterfaceidentier
Table2-2includesthefollowingelds.
àFPeld
Thisisthe3-bitformatprexinanIPv6address,indicatingtowhichaddress
categoryintheIPv6addressspacethisaddressbelongs.Currently,theeldis
001,indicatingthisisanaggregatableglobalunicastaddress.
àTLAIDeld
Thisisthetop-levelaggregationidentier,includingtheroutinginformationabout
theaddressesatthehighestlevel.Here,itreferstotheroutinginformationwith
themosthostsinnetworkinterconnection.Currently,thiseldis13bitsandcan
obtainatmost8,192differenttoplevelroutes.
àRESeld
2-5
SJ-20140504150128-018|2014-05-10(R1.0)ZTEProprietaryandCondential