IPv6现状及未来发展外文文献翻译中英文翻译外文翻译.docx

IPv6现状及未来发展外文文献翻译中英文翻译外文翻译.docx

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IPv6现状及未来发展外文文献翻译中英文翻译外文翻译

英文原文

WhatisIPv6?

IPv6isshortfor"InternetProtocolVersion6".IPv6isthe"nextgeneration"protocoldesignedbytheIETFtoreplacethecurrentversionInternetProtocol,IPVersion4（"IPv4"）.

Mostoftoday'sInternetusesIPv4,whichisnownearlytwentyyearsold.IPv4hasbeenremarkablyresilientinspiteofitsage,butitisbeginningtohaveproblems.Mostimportantly,thereisagrowingshortageofIPv4addresses,whichareneededbyallnewmachinesaddedtotheInternet.

IPv6fixesanumberofproblemsinIPv4,suchasthelimitednumberofavailableIPv4addresses.ItalsoaddsmanyimprovementstoIPv4inareassuchasroutingandnetworkautoconfiguration.IPv6isexpectedtograduallyreplaceIPv4,withthetwocoexistingforanumberofyearsduringatransitionperiod.

SomeintroductoryinformationabouttheprotocolcanbefoundinourIPv6FAQ.Forthoseinterestedinthetechnicaldetails,wehavealistofIPv6relatedspecifications.

InternetProtocolVersion6isabbreviatedtoIPv6（wherethe"6"referstoitbeingassignedversionnumber6）.ThepreviousversionoftheInternetProtocolisversion4（referredtoasIPv4）.

IPv6isanewversionofIPwhichisdesignedtobeanevolutionarystepfromIPv4.ItisanaturalincrementtoIPv4.ItcanbeinstalledasanormalsoftwareupgradeinInternetdevicesandisinteroperablewiththecurrentIPv4.Itsdeploymentstrategyisdesignedtonothaveanyflagdaysorotherdependencies.IPv6isdesignedtorunwellonhighperformancenetworks（e.g.GigabitEthernet,OC-12,ATM,etc.）andatthesametimestillbeefficientforlowbandwidthnetworks（e.g.wireless）.Inaddition,itprovidesaplatformfornewInternetfunctionalitythatwillberequiredinthenearfuture.

IPv6includesatransitionmechanismwhichisdesignedtoallowuserstoadoptanddeployIPv6inahighlydiffusefashionandtoprovidedirectinteroperabilitybetweenIPv4andIPv6hosts.ThetransitiontoanewversionoftheInternetProtocolmustbeincremental,withfewornocriticalinterdependencies,ifitistosucceed.TheIPv6transitionallowstheuserstoupgradetheirhoststoIPv6,andthenetworkoperatorstodeployIPv6inrouters,withverylittlecoordinationbetweenthetwo.

WherecanIgetanIPv6implementationformysystem?

Thereissoftwareavailableformostoperatingsystemsincommonusetoday.FindyourfavoriteOSonourlistofIPv6implementations.Wealsohaveacollectionof"howtoinstall"documentsforvarioussystems.

WhatapplicationsrunoverIPv6today?

ManycommonInternetapplicationsalreadyworkwithIPv6,andmorearebeingported.SeeourlistofIPv6enabledapplications.

BenefitsofIPv6

OneoftheclearestbenefitsofIPv6istheincreasedaddressspace.

IPv4wasdefinedbeforeitwasunderstoodjusthowexplosivetheInternetwouldbe.ConsequentlyavailableaddressesforIPv4hostsarerunningout.Manyanalystspredicthundredsofmillionsofmobilephoneswillbeinuseandrequirenetworkconnectivity.Therewillbeliterallytrillionsofnetworkdeviceswithinadecade.

IPv6alsobenefitsfromtheexperienceoftheprotocoldevelopers.Manynewideasandfeaturesthathavebeenadded-ontotheIPv4specificationcannowbeafundamentalpartofthenewprotocol.Thiscertainlyhelpsthevariousfeaturesworkasintendedwitheachother.

ThespecificationalsoenablesanlPv6hosttobeautomaticallyconfiguredbytheupstreamrouter.Asthehostbootsupitwillsolicitarouterforitsaddressprefixandotherinformationthatisusuallymanuallyconfigured.Thisschemealsomakesitmucheasiertorenumberthemachines,forexampleifthesitechangesserviceprovider.Inthecaseofmulti-homedsitestherewillbemultipleaddressespersystem.

Tosome,themostimportantfeatureisrestoringtheend-to-endnatureoftheInternet.ThisidealhasbeenerodedbyprivatenetworksbehindNetworkAddressTranslator（NAT）boxes.ImprovedSecurityispossiblewithend-to-endconnectionsandinfact,someversionsofIPsecurity（IPsec）whichisbuilt-intotheIPv6specificationrequireit.SomegamestoocannotoperatethroughaNAT.

IPv6Deployment

MostofthelargeplayersintheInternetworldhavereleasedIPv6versionsoftheirproducts.ManyroutervendorsincludingCiscohaveIPv6-enabledproducts.SunandMicrosofthaveIPv6-awareoperatingsystemsandTCP/IPstacks.IPv6isalsoavailableforLinux,FreeBSDandmostotheroperatingsystems.ManynetworksaredeployingIPv6.Also,sitesareusingtunnelingtechniquestotransportIPv6overtheirexistingIPv4network.ThisallowssitesunabletoinstallnativeIPv6connectionstoparticipateearlyintheeffortandgainusefuloperationalexperience.

Thethirdgeneration（3G）mobilephonedevelopershavealsosettledonusingIPv6、thecoreoftheirsystem.Itisclearthefutureofmobilecommunicationisnotlimitedtovoiceandtheabilitytotransferdata,whetherthatisawebpageorvideoconferencingwillgreatlyenhancetheirproduct.

The6Bone

The6boneisanIPv6Testbed.Itiscurrentlyaworldwideinformalcollaborativeproject,informallyoperatedwithoversightfromthe"NGtrans"（IPv6Transition）WorkingGroupoftheIETF.

The6bonestartedasavirtualnetwork（UsingIPv6overIPv4tunneling/encapsulation）operatingovertheIPv4-basedInternettosupportIPv6transport,andisslowlymigratingtonativelinksforIPv6transport.

Theinitial6bonefocuswasontestingofstandardsandimplementations,whilethecurrentfocusismoreontestingoftransitionandoperationalprocedures.

The6boneoperatesundertheIPv6TestingAddressAllocation,andhasformalizedrulesforparticipationandbecomingatransitprovider.Currentlythe6boneisdeployedinover50countriesdistributedaroundtheworld,isfastapproaching1000networksandend-usersitesandhasalmost90networksproviding6bonebackbonetransitservices.EveryimplementationofIPv6availableisrunningsomewhereinthe6bone.

Inter-networkpeeringishandledbyBGP4inthe6bone,asitisintheIPv4Internet.Therearealsonumerouspublicpeeringpointsnowinuseworldwide,mostnotablyinAmsterdam,Chicago（the6TAP）,London,Munich,NewYork,

Tokyo.OthersarerapidlycomingOnline.

CaliforniaLaunchesFirstSub-ChapteroftheNorthAmericanIPv6TaskForce（选自：

Ipv6英文论坛）

TheCaliforniaIPv6TaskForceannouncedtodayitisthefirstNorthAmericanaffiliatechaptertoberecognizedbytheNorthAmericanIPv6TaskForce（NAv6TF）,theguidingforceforadoptionofIPv6,thenextgenerationInternetprotocol.SanctionedbytheIPv6Forum,theNorthAmericanIPv6TaskForceistheleadingforceforIPv6adoptionandreadinessintheUnitedStatesandCanada.TheCaliforniaIPv6TaskForce（CAv6TF）launchedinJune2004,willsupportanddriveIPv6stateseminarsandevents.TheCAv6TFwillsupportCaliforniaIPv6industryandgovernment,toprovideatechnicalandbusinesscenterofexpertiseforthedeploymentofIPv6,providewhitepapers,briefings,guides,andpresentationsforpublicawareness,andworkwiththeITsectortounderstandtheimpactofIPv6transitionwithinthemarket.

ThegrowingGlobaldemandforInternettechnologiesandtheemergenceofwirelessaccesstechnologiesrequiresalargerIPaddressspace,aswellasanumberoffundamentalfeaturestoenablewirelessnetworkingandmobility.IPv6israpidlyemergingasthepreferredplatformtomeettheseneedsastheInternetevolves.Theoriginalarchitectureprotocol,IPv4,isunabletoadequatelyservethedemandsofthenewInternet,especiallyintermsofsecurity,mobility,extensibility,anddynamicre-configurability.

“TheCaliforniaIPv6TaskForceisexcitedtobeleadingthechargeinCaliforniaandtheWesttowardadoptionofthenewgenerationInternet,”saidGeofLambert,chairman,CAv6TFandrecentlyappointedmemberoftheNorthAmericanIPv6TaskForceSteeringCommittee.“WeintendtoactasaleaderbytransitioningCaliforniaentirelytotheIPv6protocolandwewillurgeotherstateswithintheU.S.andregionsworldwidetodothesameinordertorapidlybuildthenextgenerationInternet.BydemonstratingthatalocaleatlargecanhavethevisionandforesighttoadoptIPv6technologywearehelpingpioneernewterritoryandunderstandingofoneofthemostfundamentalshiftsintechnologyinoveradecade.“

“It’sstimulatingtowitnessthegrowingenthusiasmforIPv6spreadacrosstheU.S.andtheworld,”saysJimBound,IPv6ForumCTOandChairNorthAmericanIPv6TaskForce.“TheentireInternetwilleventuallytransitionfromIPv4toIPv6–butitwilltakesomevoluntaryeffortanddedicationforthistocomplete.TheCAv6TFisawelcomebodytofocusattentiononwhatlaysahead,whatneedstobedone,andhowtoaccomplishthetasksathand.ThistaskforceisoneofthebestplacestolearnaboutIPv6deployment,productsandtechnology.”

Geoflambertbeganhis20-yearcareerintheculinaryworldontheEastCoastand,afterstopsintheCaribbeanandEurope,hemigratedtotheWestCoast.GeofisafoundingpartneroftheMaxsonGroup,afirmthatspecializesinseniorlevelexecutivesearchandboardconsultingacrossavarietyofindustries.Throughouthiscareer,Geofhasbeenactivelyinvolvedwithawiderangeofprofessionalandcivicorganizations.LambertinitiatedTheInternationalFellowshipofRotariansUnitedtoBridgetheDigitalDivideandheisachairattheRotaryCenterforInternationalStudiesinPeaceandConflictResolutionattheUniversityofCaliforniaatBerkeley.InadditiontobeingthefounderandchairmanoftheCaliforniaIPv6TaskForce,whichiscomprisedofstatewideindividualsleadingthetransitionoffulldeploymentofIPv6inCalifornia,Lambe