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ID:37582005
大小:161.53 KB
页数:14页
时间:2019-05-25
《PPPOA基于SVC配置》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、PPPoverATMSVCsThisfeaturemoduledescribesthePPPoverATMSVCsfeature.Itincludesinformationonthebenefitsofthenewfeature,supportedplatforms,relateddocuments,andmore.Thisdocumentincludesthefollowingsections:•FeatureOverview•SupportedPlatforms•SupportedStandards,MIBs,andRFCs•ConfigurationTasks•Monito
2、ringandMaintainingPPPoverATMSVCs•ConfigurationExamples•CommandReference•GlossaryFeatureOverviewThePPPoverATMSVCsfeatureprovidessupportforPPPonATMswitchedvirtualcircuits(SVCs).Beforethisfeature,PPPwassupportedoverATMpermanentvirtualcircuits(PVCs)only.Withthisnewfeature,eachtimeanenduserinitiat
3、esaconnectiontoaNetworkAccessProvider(NAP)orNetworkServiceProvider(NSP),anATMSVCisestablishedusingaconfiguredATMaddress.APPPsessionisthenestablishedovertheSVC.ByusingPPP,theNAPsandNSPscanauthenticateusersandprovidesuitableaccesstothevariousservicesbeingoffered.WhereasPVCsrequirethatservicesan
4、ddestinationaddressesbepredetermined,thePPPoverATMSVCsfeatureallowsuserstochooseservicesandthequalityofthoseservicesdynamicallyonthebasisofdestinationaddress.Figure1showsatypicalnetworktopologyforPPPoverATMSVCsterminatingatanNAP.Figure1PPPoverATMSVCTerminatingatanNAPNetworkNetworkDSLaccessser
5、viceaccessproviderprovidermultiplexerDSLATMIP44412CiscoIOSRelease12.1(3)T1PPPoverATMSVCsSupportedPlatformsFigure2showsatypicalnetworktopologyofPPPoverATMSVCsterminatingatanNSP.Figure2PPPoverATMSVCterminatingatanNSPNetworkDSLserviceaccessprovidermultiplexerDSLATM44413ThePPPoverATMSVCsfeaturewo
6、rksbyassociatingeachPPPsessionwithavirtual-accessinterface.Eachvirtual-accessinterfaceisassociatedwithanSVC.TheSVCsusestaticmapsthatholdinformationabouttheencapsulationtypeandvirtualtemplatenumber.AsinglestaticmapcanacceptmultiplePPPoverATMSVCcalls.BenefitsMoreEfficientDSLProvisioningAsthedem
7、andfordigitalsubscriberline(DSL)servicesincreases,settingupanATMPVCbetweeneachsubscriberandNAPorNSPbecomesacumbersomeandinefficientmeansofdeployment.ThePPPoverATMSVCsfeaturereducesthecostofprovisioningandenhancesmanageabilityofDSLservicesforN
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