思博伦—MSTP测试仪表技术培训课件.ppt

思博伦MSTP测试仪表技术培训,Michael.zhan议程,MSTP回顾MSTP测试内容MSTP测试原理及方法思博伦通信概况SmartBits基础知识,MSTP回顾,多业务传输平台核心是SDH之上的包交换或信元交换特征是能提供以太网、ATM或POS支路板工作在一到三层，或者四层,MSTP测试内容,SDH传统测试项目光功率、眼图、频偏误码、抖动、抖动容限开销、告警保护倒换时间Ethernet接口测试帧格式自协商异常包处理流控,MSTP测试内容,Ethernet交换测试RFC2544基准测试吞吐量、丢包、时延、背靠背RFC2889测试地址学习能力头端阻塞转发能力广播复制能力超线速转发VLAN隔离测试STP协议测试IGMP组播测试,MSTP测试内容,ATM测试CBR、VBR、UBR业务类型测试吞吐量、信元传输时延、信元抖动容限、信元纠错流控、信元丢弃优先级OAM信元测试,需要AX4000！,MSTP测试内容,MSTP系统测试业务层保护倒换时间带宽共享优先级测试,别忘了！,MSTP测试原理及方法,Ethernet接口测试帧格式802.3EthernetII,MSTP测试原理及方法,Ethernet接口测试异常包处理OverSized（1518bytes）UnderSized（TestConfiguration,SetupPreference,Layer2Learning-“RouterTest”Unchecked,TheMACAddresstableupdateshownbelowoccursatthebeginningofatest(i.e.,duringtheLearningPhase).Trafficisshowninonlyonedirection(i.e.,uni-directional).WhenyousendBi-directionaltrafficthetableupdatewilloccurinbothdirections.,Layer3Learning-“RouterTest”Checked,TheARPexchangebelowoccursatthebeginningofatest(i.e.,duringtheLearningPhase).Thisexchangedescribestrafficinonlyonedirection(i.e.,uni-directional).WhenyousendBi-directionaltraffictheexchangewilloccurinbothdirections.,1.Card#1SendsaPackettoCard#2,2.CausesRoutertoARPCard#2,3.Card#2sendsanARPReply,5.Card#1SendstestPacketstoCard#2,4.RoutersARPCacheisUpdated,Card#1Protocol=IPMACDest=080002068922MAC=000000000001CardIP=192.168.99.2RoutersIP=192.168.99.1,Card#2Protocol=IPMACDest=080002898856MAC=000000000002CardIP=192.168.88.2RoutersIP=192.168.88.1,DUT=Layer3RouterProtocol=IPMACPort1=080002068922IPPort1=192.168.99.1MACPort2=080002898856IPPort2=192.168.88.1,Port1,Port2,ViewingTestProgress/Results,Allinformation,indetail,iswrittenintheLogFileforeachtestConciseinformationiswrittenintoatextReportFilewhichistimestampedEachtestiswrittenintoan“ExcelSpreadsheetlike”tableFilescanbesaveasanExcelspreadsheet,delimited,text,etc.,ViewingtheTestLog,WhatisSmartWindow?,FrontPanelGUIoftheSmartBitsChassis.,LAN-3201B1000Base-XGBICSmartMetricsModule,TX/INITOff-NotTransmittingRed-CardnotInitializedGreen-TransmittingRX/ERROff-NotReceivingGreen-ReceivingRed-RXErrorEventMGMT/PAUSEOff-NoTriggerorPauseGreen-RXTriggerEventAmber-RXPauseFramesLINKAmber-NoLinkDetectedGreen-FullDuplex,TraditionalTransmitSetupwindow,10/100TraditionalCardCapabilities,Preamble,FCS,VFD11-6,VFD21-6,VFD1&21-6Bytes-VariableFieldincrement,decrementtoggle,random,constant,Generate/DetectDribbleBitErrors,IPG,100MbpsGap880ns-1.6Sin40nsincrements,Generate/DetectAlignmentErrors,10MbpsGap8800ns-1.6S400nsincrements,Generate/DetectCRCErrors,Background:CouldCoverEntireFrame,orbeOverwrittenByVFDsVFD3:GenerateStreamsofTrafficwithChangingContent(Cyclical),customMACaddressing,and/orAnyTypeofProtocolatfullwire-ratespeed!Checkincomingpacketsforundersize,oversize,DataLength0-8KbytesLong(dependingonthecard)GeneratesRuntsandJabbers,2Triggers1-6Bytesanywhereinframe,Preamble,Destination,Source,Type,Data,FCS,SmartBitsGeneratedFrame,EthernetVersion2Frame,UpperLayerProtocol,BackgroundFill,VFD3Cyclical,MaximumFrameRatesReference,SizeEthernet(pps)FastEthernet(pps)GigabitEthernet(pps)6414,880148,8091,488,0951288,44584,459844,5942564,52845,289452,8985122,34923,496234,96210241,19711,973119,73112809619,6159612781,274Howtocalculatethemaximumframerate:Constants:Gap=96bitsPreamble=64bitsFrameSize=8Nbits(N=numberofbytes)Speed=10,000,000(Ethernet),100,000,000(FastEthernet),1,000,000,000(GigabitEthernet)inbitspersecond(bps)Formula:MaximumFrameRate=Speed(Gap+Preamble+FrameSize),AlternateTransmitSetup,Youcanmixalternateframesinwiththemaintrafficstreams.,ReceiveTriggerSetupContinued,ThisistheReceiveTriggersetupscreen.,ConfiguringSmartMetricsTests,First,configureaPortsNetworkInteraction.SetupthePortsSpeed,Duplex,andifyouwantittoobeyFlowControl.Next,configureaPortsFrameContent.SetupthecardsLayer3protocolstack(PortSetuporLayer3Setup).Setuptheport-wide“global”parameters(TransmitSetup).SetuptheStreams(TransmitSetup).Finally,setupandrunaparticularSmartMetricstest.ARP(AddressResolutionProtocol)ExchangeTimesSequenceTrackingLatencyperVTELatencyDistributionSequence+LatencyLatencyOverTimeFrameVariationRawPacketTags,10/100CardsNetworkInteraction,ObeyPauseflowcontrol?10vs.100MegabitFullvs.HalfDuplexInordertochangethespeedandduplexsettingsofacard,youmustunchecktheAllowMIIAuto-NegotiateboxintheFastEthernetsectionofthePreferenceswindow,(ormodifytheMIIregistersettings).,ConfiguringFrameContent,ToaccesstheStreamsSetupwindow,selectTransmitSetupwiththeportinSmartMetricsMode,ViewingTestResults,Thereareanumberofwaystoviewtestresults,dependingonthetypeoftestyourun,andthetypeofcardsyouuse.Counters-providearunningtallyofeventsthatoccurduringtransmission.Capture-allowsyoutoviewthecontentsofthenetworktraffic.LEDs-provideanintuitive,quickstatuscheckoftestconditions.Histograms-providerelationalinformationabouttheframesintheteststreams(SmartMetricsmodeonly).,SmartCountersDisplay,CaptureDisplay,Histograms(SmartMetricsTests),Resultswindow,LatencyOverTimeTest,Youspecifyatimeperiod(e.g.,1millisecondincrements)andtheteststoresresultsinupto16,384datacollectors.Thetestrecordsallpacketsreceivedwithtimestampdataandcalculatesthemin/max/averagelatencyforallcurrentlyactivestreams.,FrameVariationTest,Packetsthatweretransmittedatregularly-spacedintervalscanbedelayedoncetheyenterthenetworkandarriveatvaryingintervals,duetofactorssuchasjitter,orthedevicesbuffering.TheFrameVariationtestmeasuresvariationsinhowcloselyonepacketfollowsanotherinastream.,SpirentSolution,VLAN测试优先级(IEEE802.1p),加标签(IEEE802.1Q)到不加标签每端口多个VLANIP单播和组播流的混合端到端流量测试配置简单基于地址或端口的优先级支持各种拓扑结构：全网状连接，部分网状连接和端口一对一,产品演示吞吐量测试,Resultsin%Utilization,Frames/Sec,orBits/Sec,Throughput(maximumforwardingratewithzeropacketloss)perflowandgroupUser-definedacceptablelossandcontroloverthesearchtechniquebinaryorstep,EasilyplotagainstloadorframesizeReceivebitrateperuser-definedgroup,FrameLossTest,Whataretheloadtolerancelimits?Dotheyvarydependingonframesizeand/orrandomlysentandrandomlysizedtraffic?,Wereframeslostevenlyorinlargeblocksatthebeginningorend?Whatframesareinandoutofsequence?,LatencyTest,Duetobuffering,burstytrafficmaycauselatencytovarymorethanevenlyspacedframes.,Unlikeothertesters,SmartFlowandSmartBitssupportlargenumbersofflowsevenwhiletransmittingveryburstytraffic.,LatencyDistributionTest,Revealsjitterandlatencyvariationw