宽频电信乙太网路之技术与趋势(英文版).ppt

寬頻電信乙太網路之技術與趨勢,outline,IntroductionMetroEthernetForumCarrierClassEthernetEthernetDemarcationSummary,Ethernet,Mostpopularpacket-switchedLANtechnologyBusandStartopologiesBandwidths:10Mbps,100Mbps,1Gbps,10GbpsCSMA/CDCS=carriersenseSendonlyifmediumisidleMA=multipleaccessCD=collisiondetectionStopsendingimmediatelyifcollisionisdetectedExponentialBackoff,WhydidEthernetWin?,PricePerformanceAvailabilityEaseofuseScalability,,,,WorldwideEthernetbasedServicesMarketSize,TelecomEquipmentfor2005(HR2004),,EthernetServices2003-07(IDC),BroadbandServiceTrends,Source:Infonetics–April2005,WirelessSubscribers,Source:IDC,Yankee,EMC,,BroadbandSubscribers,Source:IDC,Yankee,EMC,,…andbytheway…,...Customerswantallofthese,deliveredviaasingle,convergednetwork….Enterprise&residential…Best-effort&bulletproof...,Video,voice&data…Mobile&fixed…,…viathesameEthernet-enabledinfrastructure,MetroCarrierEthernet,TheNewNetworkArchitecture,BusinessSubscriber,ServiceProvider,Nationwide/GlobalCarrierEthernet,,,,,,,Transport,,,,,,,ResidentialSubscriber,ANewNetworkArchitecture,,,VideoSource,,Internet,,Voicegateway,Voice/VideoTelephony,HDTVTVoD,VoD,,VideoSource,,,,GamingBusinessBackup,ERP,,,,,,,,,,,BroadbandWireless,BusinessBroadband,E-LineandE-LANservice,FTTxandDSLAMBackhaul,Wirelessdata/videoNetworkinMotion,,,,,,,,,,,,,,,ResidentialTriple-Play,CarrierEthernet,What’sCarrierEthernet,ScalabilityServicesandBandwidth100,000’sofEVC’sFromMbpstox10GbpsCustomerdataintegrity,Protection50msProtectionEndtoEndPathProtectionAggregatedLine&NodeProtection,HardQoSGuaranteedendtoendSLAEndtoEndCIRandEIRBusiness,Mobile,Residential,TDMSupportSeamlessintegrationofTDMCircuitEmulationServicesSupportexistingvoiceapplications,ServiceManagementFastservicecreationCarrierclassOAMcapabilitiesCustomerNetworkManagement(CNM),CarrierEthernet,WhatistheMEF?,TheMetroEthernetForumisanon-profitorganizationcharteredwiththemissionofacceleratingWorldwideAdoptionofCarrierclassEthernetNetworksandServices.TheForumiscomprisedofleadingserviceproviders,majorincumbentlocalexchangecarriers,topnetworkequipmentvendors,testequipmentvendorsandotherprominentnetworkingcompaniesthatshareaninterestinmetroEthernet.TheMEFhasover65membersasofMarch2005.,AboveNetActelisAdvaOpticalNetworksAgilentTechnologiesAlcatelAlteraAMCCAtricaAT&TAxerraNetworksAxxessitBellSouthBritishTelecomCienaCorp.CiscoSystemsColtTelecommunicationsCorrigentSystemsCovaroNetworksDiatem,EricssonExtremeNetworksFoundryNetworksFranceTelecomR&DLLCFujitsuNetworkCommunicationsFutureSoftHammerheadSystemsHarbourNetworksHatterasNetworks,Inc.HuaweiTechCo.Ltd.IndustrialTechnologyResearchInstituteIometrixIskratelIXIAJuniperNetworksKDDIR&DLaboratories,Inc.,MEFMemberListasofJune6,05,LucentTechnologiesLuminousNetworks,Inc.MahiNetworksMarconiCommunicationsMarvellSemiconductorMet-NetCommunicationsMetrobilityOpticalNativeNetworksNortelNetworksCorp.NTTAdvancedTechnologyCorp.OmniTronSystemsTechnologyPMC-SierraQwestCommunicationsRADDataCommunicationsRazaMicroelectronicsReduxCommunicationsRiverstoneNetworksSBCCommunications,Inc.,ShenickSiemensAGSIINetworkSystems,IncSpirentCommunicationsSunriseTelecomTelcordiaTechnologiesTelcoSystemsTeliaSoneraABTellabsTerachipTpackA/ST-SystemsTransmodeSystemsTranswitchUNH-InterOperabilityLabVerizonCommunicationsWorldWidePacketsZarlinkSemiconductorZTECorporation,MEFMemberListasofJune6,05,CarrierEthernetStandards,ScalabilityMEF9–UNITestingMEF11–UNIFrameworkMEFUNIIIAMEFUNITypeIIMEFEthernetAggregationIEEE802.1,ProtectionMEF2–EthernetProtectionMEF4–ArchitectureFrameworkIETF–MPLSFastReroute,HardQoSMEF6–ServiceDefinitionMEF10–ServiceAttributesMEFServiceAttributesIIMEFServiceAttributesTestingMEFServiceDefinitionII,TDMSupportMEF3–CESFrameworkMEF8–CESImplementationMEFTDMTesting,ServiceManagementMEF7–EMSandNMSInfoModelMEFOAMFramework&RequirementsMEFPerformanceMonitoringMEFNEManagementRequirementsIEEE802.1,ITU,CarrierEthernet,CarrierEthernetDrivers,ResidentialTriplePlaywithIPTV100’sofTVchannelsVideoondemandVideorecording/playbackInteractivevideoappsMulti-megabitInternetaccessRemotelearningGaming,BusinessUltimateConnectivityDataCenterConsolidationGigabitconnectivitybetweenbusinessesStorageanddisasterrecoveryGuaranteedratemulti-megabitInternetaccessVideoconferencing&broadcastBusinesstelephony,MobileWirelessbackhaulWi-FiAccessdeliveryWiMAXinfrastructure3GandbeyondwirelessNextgendataservicesHighresolutionphotoWirelessvideoGamingDigitalTV,,,,,SupportingBusinessServices,Any-to-anyLayer2VPNtointerconnectmultiplelocationstransparentlyandeffectively(withhighandguaranteedbandwidth)Supportingtheconvergenceofdataandvoice,Branch,ISP,Nationwide/GlobalCarrierEthernet,IP,,,Branch,Branch,Branch,HQ,,Internet,E-LAN,SupportingTransportforIPNetwork,Nationwide/GlobalCarrierEthernet,,,,,IP,IP,IP,E-LANconnectionsamongroutersAnylogicalIPtopology,multipleEVC’sofasinglephysicalinterfaceItsupportsallbusinessIPservices,fromIPVPNtoInternetaccess,R,R,R,R,R,R,R,R,R,R,R,R,,,,SupportingTVDistributionService,Subscribers,Nationwide/GlobalCarrierEthernet,IPDSLAM,,,,,,,,,,,,,,,,,1.Multicasttree(s)is(are)establishedwithQoSguaranteed,2.Subscribers(theSet-Top-Box)sendsrequestforachannel,3.CarrierEthernetfilters,onlyreplicatesandforwardstherequestedchanneltothesubscribers,4.Videosourceprotectionandnetworkprotectionaresetupautomaticallyuponrequirement,,,,,,,,,,,,,,,,,,,,,,,L2DSLAM,IPDSLAM,L2DSLAM,IPDSLAM,IPDSLAM,L2DSLAM,,,,,SupportingVoDService,Subscribers,Nationwide/GlobalCarrierEthernet,IPDSLAM,,,,,,,,,,,,,,,1.AnE-LANconnectionisestablishedbetweenDSLAMsandVoDservers,2.Subscribers(theSet-Top-Box)sendsrequesttoRSMforamovie,3.RSMfinds/informsthebestVoDserver,acknowledgesubscribersofsuch,,,,,,,,,,,,,,,,,,,,,,,L2DSLAM,IPDSLAM,L2DSLAM,IPDSLAM,IPDSLAM,L2DSLAM,,,E-LAN,,,,4.ThesubscriberestablishesRTPandRTSPsessionwithVoDandCommandserverrespectively,,,SupportingVoIPService,Subscribers,Nationwide/GlobalCarrierEthernet,IPDSLAM,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,L2DSLAM,L2DSLAM,IPDSLAM,L2DSLAM,,1.AnE-LANconnectionisestablishedbetweenWANrouterstobuildanIPWAN,L2DSLAM,L2DSLAM,E-LAN,,2.AnE-LANconnectionisestablishedbetweentheDSLAMsandtheIPPoPineachmetro,,,3.CallercontactstheSIPProxyserverinordertofindtheIPaddressofthecalledparty,4.CallerestablishesRTPsessionwiththecalledpartythroughE-LANconnection,,,,CarrierEthernetfor3G/UMTSBackhaul,GuaranteedQoSFlexibleSLAportfoliosfordifferentusersandservicesFlexiblebandwidthgrowthwithoutnetworkupgradeEfficientnetworkformultimediaapplications(P2P,P2MP,MP2MP)SecureconnectivityforcorporateandconsumerusersSeamlessintegrationwiththewirelinetransportnetwork–bothEthernetandTDM,,CarrierEthernet,,IP,,,,SupportingResidentialTriplePlayServices,Subscribers,Nationwide/GlobalCarrierEthernet,IPDSLAM,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,L2DSLAM,IPDSLAM,L2DSLAM,IPDSLAM,IPDSLAM,L2DSLAM,,Voice,video&datadistribution&backhaul,ServiceProviderBenefits,GreaterRevenuePotential-GranularBandwidthMultipleRevenueStreamsfromSingleInterfaceInternetAccess(E-Line)EthernetVirtualPrivateLine(E-Line)VirtualPrivateLANService(E-LAN)BTVandVoD(TriplePlay)VASEnabled(VoIP,L3VPN,TDM/CESetc.)LowerCapitalCostsLowerOPEXCostsHigherCustomerRetention,EthernetDemarcation,,,,WhatisEthernetDemarcation?,,,,,,,,,,,UNI,UNI,MediaConvrtr.,MediaConvrtr.,CarrierEdge,CarrierEdge,MediaConvrtr.,MediaConvrtr.,,,100FX,100FX,Cust.Eqpmnt.,Cust.Eqpmnt.,,EthernetDemarcationNecessaryatcarriertocustomerinterface(UNI)ProvidesseparationbetweencarrierWANandenterpriseLANEnablestestingandmonitoringofbothLANandWANIEEE802.1ajstandardstartedMar‘05,CarrierNW,,,,100FX,100BT,,100BT,DemarcationDevice,,,UNI,,,CarrierWANNetwork,,,Cust.LANNetwork,Cust.LANNetwork,,,EthernetDemarcation:HistoryRepeatsItself,Ethernet10/100BTDemarcationpoint:mediaconverter,L2switch,ADM,andnowdedicateddevices,LegacyServices(egFrameRelay)Demarcationpoint:Smartjack,CSU/DSUorNTE.,,Smartjack,CSU/DSUorNTE,V.35,,,CarrierNetwork,DemarcationPoint,ADM,ModemorMediaconverter,DemarcationiscriticaltoscalingEthernetServices,CarrierNetwork,DemarcationPoint,,Switch/Router,,,,,,,CustomerNetwork,E1/T1,Switch/Router,,,,,,,CustomerNetwork,,ADMorModem,EoX,100BT,,100BT,EthernetDemarcationDevice,EthernetDemarcation,TwokeyfunctionsforEthernetdemarcationEthernetNID(NetworkInterfaceDevice)orNetworkTerminationEquipment(NTE)Link/ServicelayerEthernetOAM–802.3ah&802.1agEthernetServiceUNI(UserNetworkInterface)Servicelayerpolicinganddefinition–MEF/ITUFunctionsmaybeinstandalonedevicesorintegratedintofirstmiletransportdevicesorCPEequipment,,,10/100BT,,CustomerPremise,DemarcationDeviceUNI&NID/NTE,,CarrierNetwork,CarrierNetwork,DemarcationPoint,,,CustomerNetwork,,100FX,GbEorEoX,ADM,ModemorMediaconverter,10/100BT,Cust.Eqpmnt.,UserNetworkInterface(UNI),,,10/100BT,,UserNetworkInterface(UNI),,CarrierNetwork,,EoX,UserNetworkInterfaceUNI)functionmustbeatcustomer/carrierdemarcationpointEspeciallyifaccesslinkrequiresratelimitingfortransportMEFbasedservicedefinition(UNI)onportorEthernetVirtualCircuit(EVC)basisCIR/EIR–Committed/ExcessInformationRateCBS/EBS–Committed/ExcessBurstSizeTrafficclassification/prioritybasedonTOS/DSCP/802.1P/802.1Q/etc.LowlatencyhandlingofVoIP/videoservicesEthernetVirtualCircuit(EVC)orVLANsupport802.1Q&Q-in-Q-Add,remove,swapandstackingofVLANtags,,,50M,10M,,,,CustomerPremise,ADM,ModemorMediaconverter,CustomerEquipment,,,CarrierNetwork,NetworkInterfaceDevice(NIDorNTE),,10/100BT,,NID/NTE,,EoX,Carriervisibilityofcustomernetwork,,Carriervisibilityofcarriernetwork,,,,NIDorNTErequiredatcustomerhandoffforOAMAnalogoustosmartjack,CSU/DSUorNTEforframerelayLinkOAM(802.3ah)isnecessarybutnotsufficientPerformancemonitoringandthresholdcrossingalarmsRemotefailureindication-Dyinggasp,linkfault&criticaleventRemoteloopback(Port)Services/ConnectivityOAM(802.1ag,ITU,MEF,etc.)ContinuityverificationServicelevelloopbackAIS/RDIorfaultpropagationTestheadtogeneratetestsuites(RFC-2544)Cableintegritytestforcustomerpremise,Cust.Eqpmnt.,CustomerPremise,Discovery,AllowsprovideredgeswitchtodeterminetheOAMcapabilityoftheremotedemarcationdevice802.3ahOAMsupportis“optional”IfbothendssupportOAM,thenthetwoendsexchangestateandconfigurationMode-activevspassiveOAMPDUsizeIdentityLoopbacksupport,,10/100BT,,DemarcationDevice,,CarrierNetwork,EoX,Cust.Eqpmnt.,,DiscoveryMsg(Active),,CustomerPremise,DiscoveryResponse(Passive),,,PerformanceMonitoringforSLAConformance,,,10/100BT,,,CarrierNetwork,,EoX,,,Visibility,CarrierNetwork,,,CustomerNetwork,CollectedonportandEVC(VLAN)basisFrombothsidesofdemarcationpointRMONEtherstatsaren’tenough,extensionsfor:Discardedpackets(outofSLA),averagebitrateparameters,ingressvs.egressBW,etc.15minute/24hourcollectionintervalswithhistoryThresholdcrossingalerts/notificationReal-timeviewofserviceperformanceReportsforcustomervalidation–monthlyandweb,Cust.Eqpmnt.,DemarcationDevice,RemoteFailure–LinkFault/CriticalEvent,,,10/100BT,,CustomerPremise,DemarcationDevice,DemarcationPoint,EoX,LinkFaultmsg,LinkFault–e.g.LossofsignalisdetectedbythereceiverSentoncepersecondCriticalEvent–ManufacturerspecifiedfailureeghardwareorsoftwarealarmSentimmediatelyandcontinuously,,,,,CarrierNetwork,Cust.Eqpmnt.,,,,RemoteFailure-DyingGasp,,,10/100BT,,CustomerPremise,DemarcationDevice,,CarrierNetwork,DemarcationPoint,,EoX,ADM,ModemorMediaconverter,DyingGaspmsg,,Signalscarrierthatanunrecoverablelocalfault(e.g.powerfailure)hasoccurredSentimmediatelyandcontinuouslyCriticalforbothACandDCpoweredcustomerpremiselocatedequipment,,,Cust.Eqpmnt.,,CustomerPremise,EthernetPortLoopback,,10/100BT,,CustomerPremise,DemarcationDevice,,CarrierNetwork,Loopback,,PortleveltestingisidealforturnupandcommissioningEliminatestruckrollsWorkswithcentraltestheadtoperformRFC-2544testsMeasuresperformance(delay,droppedpackets,throughput,etc.)IdealforfaultisolationandlocatingwithincarriernetworkCanalsoworkwithintegratedtestheadforend-to-end(servicelevel)RFC-2544verificationIdealforend-to-endSLAverification,DemarcationDevice,CustomerEquipment,,CustomerPremise,Selective(Non-Intrusive)Loopback,,10/100BT,,CustomerPremise,,CarrierNetwork,SelectiveLoopback,SelectiveloopbackperformedonVLANorspecificOAMframes(eg.opcode:ETH_LB)IntrusivelytestofanindividualEVC(VLAN)whileremainingEVCsarein-serviceAlsousedforcontinuitycheckandserviceassuranceFar-endtestheadexecutestestperiodicallyonnon-serviceaffectingVLANorOAMframetoverifyendtoendconnectivitythroughentirenetwork–similartopingCanmeasuredelay,throughput,droppedframesofend-to-endservice–followsactualdatapath(LSP,etc.)ofcustomertraffic,TestPattern,TestHead,,,,CustomerTraffic,,,,DemarcationDevice,DemarcationDevice,Cust.Eqpmnt.,CableIntegrityTesting,,,10/100BT,,CustomerPremise,DemarcationDevice,,CarrierNetwork,DemarcationPoint,EoX,Identifiesopens,shortsandimpedanceproblemswithCAT-5cableoncustomerpremiseMeasuresdistancetocablefaultAddresseslargepercentofcustomerinducedissues,Cust.Eqpmnt.,RemoteFault,EthernetAIS/RDI,UsedtosuppressdownstreamalarmsandeliminatealarmstormsfromasinglefailureCommonlyusedinlegacyserviceslikeSONET,TDM,framerelay,etc.,,,,,,,,,,,,,InsertAIS,AlarmsSuppressedReportAlarm,FaultPropagation,,,10/100BT,,CustomerPremise,DemarcationPoint,EoX,FaultPropagationallowsupstreamlinkissuestopropagatedownstreamCriticalforenduserapplicationsthatneedvisibilityofnetworkissuesEgRedundantroutingprotocols(HSRP),,DemarcationDevice,,CarrierNetwork,Cust.Eqpmnt.,,,,,,LinkdownAISRXJABBERRFIDUPUNKNOWN,LinkdownAISDonothing,Propagation,DemarcationForSLAConsistency,,,,100BT,EoSONET,CustomerLocation3,ADM,ADM,,100FX,GbE,,,,CarrierIPNetwork,CustomerLocation2,CustomerLocation1,,,SophisticatedQoSVLANbasedservicesMonitoringonport&VLANDetailedstatistics,,,LimitedQoSSimpleportlevelservicesMonitoringonportonlyLimitedstatistics,,,100BT,ADM,100BT,,EthernetDemarcationDeviceSophisticatedQoSVLANbasedservicesMonitoringonport&VLANDetailedstatistics,,,,,EthernetdemarcationdeviceprovidesSLAconsistencyregardlessoftransporttechnologye.g.ADMmadetolooklikeopticalEthernet,DemarcationDevice,DemarcationForOAMCapabilities,,,EoSONET,CustomerLocation3,ADM,ADM,,100FX,GbE,,,,CarrierIPNetwork,CustomerLocation2,CustomerLocation1,,,,100BT,100BT,EthernetdemarcationdeviceprovidesOAMcapabilityforremotemanagementPerformancemonitoringRemotefailureindicationRemoteloopbackContinuitytestingRemotetestheadCableintegritytesting,etc.,DemarcationDevice,1000BT,DemarcationDevice,,,,,MediaConverter,,100BT,,,1000BT,100BT,DemarcationDevice,MediaConverter,Summary,MetroEthernetForumwebsite:http://www.metroethernetforum.orgCarrierClassEthernetProtectionHardQosTDMsupportScalabilityServicemanagementEthernetDemarcationPerformancemonitoringLoopbacktestFailurealarm,