Zte ZXR10 ZSR V2 - Table 2-3 Structure of the Ipv6 Address Embedded with Ipv4 Address; Table 2-4 Structures of Link-Local Address and Site-Local Address

Chapter2IPv6AddressConguration
acceptthesepacketsinthesamewayasitreceivespacketsfromexternalnodes,
andtransmitsthembacktotheprotocolstack.
Theloopbackfunctionisusedforsoftwaretestandconguration.Exceptthe
lowestbit,alltheotherbitsofanIPv6loopbackaddressare0,thatis,aloopback
addresscanbeexpressedas0:0:0:0:0:0:0:1or::1.
àIPv6addressembeddedwithIPv4address
IPv6providestwokindsofaddresses.OneistheIPv4-compatibleaddress,which
allowstheIPv6nodetoaccessIPv4nodesthatdonotsupportIPv6..Theotheris
theIPv4-mappingaddress,whichallowstheIPv6routertotransmitIPv6packets
overtheIPv4networkintunnelmode,wherethenodesunderstandbothIPv4
andIPv6.
Thehigh-order80bitsofthesetwokindsofaddressesareallsettozeros,and
thelow-order32bitscontaintheIPv4address.Ifthemiddle16bitsofanaddress
aresettoFFFF ,itindicatesthatthisaddressistheIPv6addressmappingtoIPv4
address.Table2-3liststheaddressstructuresofthesetwokindsofaddresses.
Table2-3StructureoftheIPv6AddressEmbeddedWithIPv4Address
IPv4CompatibleAddress
801632
0000.................................00000000IPv4address
IPv4imageaddress
801632
0000.................................0000FFFFIPv4address
lLinkLocalAddressandSite-LocalAddress
UsingthenetworkModel10addresstotranslateIPv4networkaddressesprovides
anoptionfortheinstitutionsthatdonotwanttorequestgloballyuniqueIPv4network
addresses.
Arouterthatresidesoutsideofaninstitutionbutusedbytheinstitutionshallnot
forwardtheseaddresses.Itcanneitherpreventtheseaddressesfrombeing
forwarded,nordistinguishtheseaddressesfromothervalidIPv4addresses.Itis
comparativelyeasiertomakecongurationsforaroutertoenableittoforwardthese
addresses.
Toimplementthisfunction,IPv6allocatestwodifferentaddresssegmentsfromthe
globallyuniqueInternetspace.Table2-4isoriginatedfromRFC,indicatingthe
structuresoflink-localandsite-localaddresses.
Table2-4StructuresofLink-localAddressandSite-localAddress
Link-localAddress
105464
2-7
SJ-20140504150128-018|2014-05-10(R1.0)ZTEProprietaryandCondential