Chuyên đề Mạng truyền dẫn quang (TS. Võ Viết Minh Nhật) - Bài 4 IP Over WDM Integration

Bài này nhằm cung cấp cho học viên các kiến thức và kỹ năng về:Yêu cầu về viêc tích hợp IP over WDMTích hợp IP over WDM dựa trên quan điểm Data PlaneIP Over ATM Over SDH for WDM TransmissionIP Over ATM Directly on WDMIP Over SDH; Packet Over SONETIP Over SDL Directly Over WDMIP Over GbE Over WDMTích hợp IP over WDM dựa trên quan điểm Control PlaneGMPLS trong việc tích hợp IP over WDM
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Chuyên đề Mạng truyền dẫn quang (TS. Võ Viết Minh Nhật) - Bài 4 IP Over WDM IntegrationChuyênđê: Mạng truyền dẫn quangBài 4: IP Over WDM Integration Mechanisms TS.VõViếtMinhNhật KhoaDuLịch–ĐạihọcHuế vominhnhat@yahoo.com 1Mục tiêuo Bàinàynhằmcungcấpchohọcviêncáckiếnthứcvàkỹnăngvề:  YêucầuvềviêctíchhợpIPoverWDM  TíchhợpIPoverWDMdựatrênquanđiểmDataPlane • IPOverATMOverSDHforWDMTransmission • IPOverATMDirectlyonWDM • IPOverSDH;PacketOverSONET • IPOverSDLDirectlyOverWDM • IPOverGbEOverWDM  TíchhợpIPoverWDMdựatrênquanđiểmControlPlane  GMPLStrongviệctíchhợpIPoverWDM 2Nội dung trình bày4.1.Introduction4.2.IPOverWDM—TheDataPlanePerspective 4.2.1.IPOverATMOverSDHforWDMTransmission 4.2.2.IPOverATMDirectlyonWDM 4.2.3.IPOverSDH;PacketOverSONET 4.2.4.IPOverSDLDirectlyOverWDM 4.2.5.IPOverGbEOverWDM4.3.ControlPlaneIntegration4.4.GMPLS 34.1. Introductiono Differentapproacheshavebeenproposedforthesmooth,fast,andreliable provisioningandmanagementofInternetservicesovertheopticallayer.o Theapproachescanbecategorizedinthreemainareas:  onesusingthecontrolplaneonly,  onesusingthemanagementplaneonly,and  onescombingthemanagementandcontrolplaneapproaches.o Mostoftheresearcheffortsaretryingtobenefitfromthecontroland signalingmechanismsofthecontrolplaneapproachintheopticallayer, leavingthemanagementfunctionsinasupportive/secondaryrole. 4Approache of C.Plane over D.Plane 54.1. Introductiono Thebasicideaadoptedwastoextendthecontrolandsignaling mechanismsoftheInternettotheopticallayer,delegatingextra intelligencetotheopticalnetworkelements(ONEs).o Suchefforts,drivenbydifferentstandardizationbodies,are amongotherstheITUT:automaticswitchedoptical network/automaticswitchedtransportnetwork(ASON/ASTN), theOpticalInterworkingForum(OIF):opticalusernetwork interface(UNI)andnetworktonetworkinterface(NNI) activities,andtheIETF:generalizedMPLSframeworkand correspondingprotocolextensions. 64.1. Introductiono Anotherintegrationapproachwouldbepossiblethroughthe extensionofthetelecomstylenetworkmanagementapproachto theIPlayerasaresultofMPLScapabilities,whicharesimilarto theconnectionorientedtechnologies.o Insuchacase,theintegrationoftheIP/MPLSandWDMlayers ismainlyperformedwithmanagementmeanscapableof performingintegratedprovisioningofLSPsoveropticalchannels (lambdas),aswellasintegratedmultilayerfaultandperformance management. 7GMPLS enabled multilayer router 84.2. IP Over WDM—The Data PlanePerspectiveo Differentencapsulationmethodshavebeenproposedforthe smoothintegrationofIPoverWDM.o Thebasicapproachesare IPoverATMoverSDHoverWDM  IPoverATMoverWDM  IPoverSDH;PacketoverSONET  IPOverSDLDirectlyOverWDM  IPoverGbEoverWDM,andnowIPover10GbEoverWDM.  94.2.1. IP Over ATM Over SDH for WDMTransmissiono TherearemanyflavorsofIPoverATM(e.g.,classicalIPover ATM,LANemulation,andmultiprotocoloverATM).Forlong haultransportoverWDM,themoststandardtransmission formatcurrentlyistousetheSDHframe.o InthescenarioofIPoverATMoverSDHencapsulation,IP packetsaresegmentedintoATMcellsandassigneddifferent virtualconnectionsbytheSDH/ATMlinecardintheIProuter. TheATMcellsarethenpackedintoanSDHframe,whichcanbe senteithertoanATMswitchordirectlytoaWDMtransponder. 10Example of IP over ATM over SDH encapsulation for transport over a WDM network 114.2.2. IP Over ATM Directly on WDMo ItispossibletohaveascenariowhereATMcellsaretransported directlyonaWDMchannel.Fromanarchitecturalpointofview, thisscenarioisthesameasthepreviousonebuttheATMcellsare notencapsulatedintoSDHframes.Insteadtheyaresentdirectly onthephysicalmediumbyusinganATMcellbasedphysical layer.o Cellbasedphysicallayer ...