文档介绍：IPv6网络演进方案为什么需要IPv6IPv6演进技术简介IPv6演进方案演进路线和方案总结目录IPv6进入大家的视野Operatorisworryingabout…IndustryispushingIPv6forward…“WorldIPv6Day”anizedbyISOCGovernmentispoweringIPv6…In2006,workIn2003,theEuropeUnionformallysuggestallthememberstoshouldgivefullsupporttoIPv6developmentIn2001,JapanmadeanationalstrategyofIPv6developmentIPv6是什么?IPv4地址数目=2^32=4BillionIPv6地址数目=2^128=340trilliontrilliontrillion地球上有70亿人,但只有不到40亿地址,因此…我们可以为地球表面的每个原子分一个IPv6地址,而剩余的IPv6地址数目可以再给100多个地球分地址;IPv4地址分配现状bers/北美以及北美的少数公司占用了大量IPv4地址;欧洲地区当前业务发展成熟,IPv4地址基本够用;亚太业务还在不断发展,但已经快没有IPv4地址可用;非洲、拉丁美洲业务发展较慢,后续也面临地址问题;由于各级分配机构的湖泊效应,IPv4地址的真正耗尽有一定的滞后Page6IPv6的主要驱动力仍然是IP地址耗尽IANAfreepoolhasexhausted(Feb3,2011)RIRexhaust:soonafter(,theAPNICpoolreachedtheFinal/8IPv4addressblock)workIPv4AddressSpaceExhaustionExplosivedemandforAddressGrowthofbroadbanddeployments(>1addressinONEhome)oMachineWe’vereallyreachedthebreakingpoint50B5B>>57BUnbalanceHughDemand“It'senoughtodoanexperiment,theproblemistheexperimentneverended.“----VintCerfTwoWaystoSolveAddressIssueMassiveworkhavebeendone,multipleapproacheshavebeenfound/triedIPv4AddressSpaceExhaustionCouldweJUSTuseNATtosolvetheWHOLEaddressissue?workAddressTranslation(NAT),especiallyNAT444CollectandreusetheidleIPv4addressStricterPolicyonassigningIPv4addressattheRIRs128=296timesIPv4IPv4NATvsIPv6CGN/NAT*就好比一扇门,而使用IPv4私网地址好比从门镜往外看;IPv4主要用于人和人,或者人和服务器间的通信;IPv6好比打开的窗户可以自由的和外界通讯;不仅支持在人之间,也完全可以支持在机器之间的通信;IPv4IPv6*CGN:CarrierGradeNAT,workAddressTranslationM2M和IPv6IPv6的地址数量足够支撑M2M应用IPv6的无状态自动分配地址能力和自动路由能力IPv6没有NAT穿越问题,更易于远程控制LightWeightIPv6小功耗适于各种传感器使用IPv6专题培训-(20111019)IPforSmartObjects(IPSO)AllianceQuickScanofIPv6IndustryChainIPv6isreadyfordeployment,-,IPv6migrationisalong-termproject,-specificscenariosStandardThemainOperatingSystemsarereadyW