Zte ZXR10 T600

ZXR10T600/T1200UserManual(IPv6Volume)
indicatingthisistheaggregatableglobalunicastad-
dress.
–TLAIDeld
Thisisthetop-levelaggregationidentier ,includingthe
routinginformationabouttheaddressesatthehighest
level.Here,itreferstotheroutinginformationwiththe
mosthostsinnetworkinterconnection.Currently,this
eldis13-bitandcanobtainatmost8,192different
toplevelroutes.
–RESeld
Thisisan8-biteldandreservedforfutureuse.Itis
likelytobeusedforextendingthetop-ornext-level
aggregationidentiereld.
–NLAIDeld
Thisisthenext-levelaggregationidentierwith24-bit.
Thisidentierareusedbysomeinstitutions(including
large-sizeISPsandotherinstitutionsthatprovidepublic
networkaccess)tocontrolthetop-levelaggregationfor
addressspacearrangement.
Suchinstitutionscandividethis24-biteldforuseinac-
cordancewiththeirownaddressinghierarchicalstructures.
Inthisway,anentitycandividetwobitsofaddressspace
intofourinternaltop-levelroutes,andallocatetheother
22bitsofaddressspacetootherentities(forexample,a
smalllocalISP).
Whentheseentitiesobtainenoughaddressspace,theycan
subdividetheobtainedspaceinthesamewayasmentioned
above.
–SLAIDeld
Thisisthesiteaggregationidentierandisusedby
someinstitutionstoarrangetheirinternalnetwork
structures.Eachinstitutioncancreateitsowninternal
hierarchicalnetworkstructureinthesamewayasthat
ofIPv4.
Whenthe16-biteldisdedicatedtotheplaneaddress
space,thereareatmost65,535differentsubnetsavail-
able.Ifthersteightbitsareusedfortheinternalad-
vancedroutingofthisinstitution,thentherewillbe255
advancedsubnetsavailable,andeachadvancedsubnet
canhaveupto255sub-subnets.
–Interfaceidentiereld
Thisisa64-biteld,containing64-bitvaluesofthe
IEEEEUI-64interfaceidentier .
�SpecialAddress&ReservedAddress
Intherst1/256IPv6addressspace,therst8bits0000
0000ofalltheaddressesarereserved.Mostofthevacant
addressspacesareusedforspecialaddresses,including:
–Undesignatedaddress
Thisisanall-zeroaddressandisusedifnovalidaddress
isavailable.Forexample,ifahostdoesnotobtainan
IPv6addressuponitsinitialstartupfromthenetwork,
8CondentialandProprietaryInformationofZTECORPORATION