文档介绍：IPv6技术讲座滕小玲******@*1主要内容为什么使用IPv6IPv6主要特性IPv6报头IPv6地址IPv6的发展历程Date2为什么使用IPv6TheCaseforIPv6IPv4所面临的问题IPv4的地址严重匮乏路由表急剧膨胀网络安全暂时的解决方法NATCIDRDate3IPv6主要特性LargerAddressSpace128位Aggregation-basedaddresshierarchyEfficientbackboneroutingEfficientandExtensibleIPdatagramNofragmentationbyrouters64bitsfieldalignementSimplerbasicheaderAutoconfigurationSecurityIPRenumberingpartoftheprotocolDate4IPv6报头Date5IPv6报头Version(4bits) lass(8bits)~TOSinIPv4identifyclassesandpriorities(diffserv)FlowLabel(20bits)PayloadLength(16bits)NextHeader(8bits)ExtensibleheaderstructureHopLimit(8bits) ~TTLinIPv4Date6IPv6地址类型RFC2373可聚集全球地址(AggregateableGlobalUnicastAddresses)001 1/8totalspace链路本地地址(Link-LocalUnicastAddresses)1111111010 1/1024totalspace节点本地地址(Site-LocalUnicastAddresses)1111111011 1/1024totalspace多点传送地址(MulticastAddresses)11111111 1/256totalspaceDate7IPv6地址UnicastaddressesLink-Local FE80::/10automaticallyconfiguredwithinterfaceidusedforneighborandrouterdiscoveryAggregateableGlobal 2000::/3Date8IPv6地址MulticastAddressesRFC2375 IPv6MulticastAddressAssignmentFF00::/8 FFfs::/16f:flag 0:permanent;1:notpermanents:scope 1:node 2:link 5:site anization E:globalFF02::1 workFF02::2 workDate9IPv6地址AnycastAddressesRFC2526 AnycastAddressesAdvantagesofanycastroutingoptimizationserverloadAnycastaddressstyleDate10