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皖西学院本科毕业论文（设计）I基于QINQ技术的ＩＰ城域网优化方案的实现作者周国祥指导教师毛德梅摘要：随着使用互联网人数的增大，各种不同的业务也在增多，导致IP城域网在不断的扩大，各种安全问题也在频繁出现。为了能够对用户进行精确标识，同时使城域网具备业务识别能力，确保业务数据流的正确转发，必须对整个城域网进行扩容。QINQ技术作为802．1Q协议的扩充，在802．1QVLAN的基础上又增加了一层VLAN标签，拓展了VLAN空问，克服了目前VLAN在城域网发展中遇到的数量不足的问题。同时，为了适应城域网的发展，QINQ封装、终结的方式也越来越丰富，为用户精确标识和业务识别提供了有效的解决方案，在运营商的业务精细化运营方面得到了越来越深入的应用。本文对QINQ技术的原理和它在IP城域网中的应用进行了研究，介绍了QINQ技术在IP城域网中的几种常用组网方案。同时为满足更多的用户上网需求。首先，设计了VLAN模块。通过用户接口，完成QINQ配置命令的处理，实现了以太网子接口VLAN信息的维护。其次，通过分析VLAN、PPPOE等模块之间的数据流和控制流，实现了三层以太子接口报文接收和发送的处理。最后，通过对现有PPPOE接口和固定IP业务的接口，在BAS和接入层上实现QINQ隔离端口功能。该方案能够应用在QINQ组网的环境中，解决了用户精确定位、业务识别等问题，增强了网络的可运营、可管理性。关键词：QINQ；ME60；交换机、；PPPOE；端口隔离皖西学院本科毕业论文（设计）IIImplementationofIPMAN’soptimizationbasedonQINQtechnologyAbstract：AStheusingnumberofInternetincreases，anddifferentkindsofbusinessarealsoontherise，theyhavecontributedtotheIPMANexpandingconstantly，andmadeavarietyofsecurityproblemsemergefrequently．Inordertoaccuratelyidentifytheuserandmakethemalsohavetheabilitytoidentifybusinesses;makeappropriatetriageofthedifferentservice，andensuretoforwardcorrectlythebusinessdataflow，itisnecessarilythatOperatorexpandstheentiremetropolitanareanetwork.ThatQINQbeingusedas802.1Qprotocolextension，andaddingalayerofVLANlabelbasedonVLAN，expandstheVLAN，expandstheVLANspace，andovercomestheproblemofinsufficientquantitythatthecurrentVLANencounteredinMANdevelopment.Atthesametime，inordertoadaptthedevelopmentmetropolitanareanetwork，QINQpackage，theendingwaybecomemoreandmoreabundant，whichprovidesaneffectivesolutiontopreciseidentificationandserviceidentificationfortheuser.Moreover，ithasbeenmorein-depthapplicationintheoperationalaspectsofbusinessrefinement.ThepaperstudiestheprincipleofQINQtechnologyanditsapplicationinIPMAN,andalsointroduceseveralcommonnetworkingsolutionstoQINQtechnologyinIPMAN.Firstly,IdesignedtheVLANmodule.Throughdesigningoftheuserinterface，andaccomplishingtheQINQconfigurationcommandprocessing，itmaintainsEthernetnetworkinterfaceVLANinformation.Secondly，throughtheanalysisoftheexistingPPPOEinterfaceandafixedIPserviceinterface，wecanachievethefunctionoftheQINQisolationportbasedonBASandtheaccesslayer.ThisprogramcanbeappliedtoaQINQnetworkenvironment.Itwillsolvesomeproblems,forinstance，theuser’sprecisepositioning，serviceidentificationandisolationect.Thisschemewillenhancetheoperationandmanageabilityofnetwork.Keywords:QINQ；ME60；switch；PPPOE；PortIsolation皖西学院本科毕业论文（设计）III目录1绪论.........................................................................................................................................................................11.1研究背景......................................................................................................................................................11.1.1VLAN的局限性................................................................................................................................11.1.2研究方案的意义...............................................................................................................................31.1.3研究方案的主要内容.......................................................................................................................31.2本文内容安排..............................................................................................................................................42QINQ技术..............................................................................................................................................................52.1QINQ（802.1Qin802.1Q）技术介绍........................................................................................................52.1.1QINQ报文格式.................................................................................................................................52.1.2QINQ封装.........................................................................................................................................62.1.3QINQ终结.........................................................................................................................................72.2QINQ在IP城域网中的应用......................................................................................................................82.2.1QINQ组网方案.................................................................................................................................93BRAS及相关协议...............................................................................................................................................123.1宽带远程接入服务器................................................................................................................................123.2PPP协议.....................................................................................................................................................133.2.1PPP交互过程..................................................................................................................................133.2.3PPP认证方式........................................................................................................