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1、,Frame Relay and ATM Interworking,Approaches to InterworkingInterworking Market DriversThe Benefits of InterworkingThe Technology of Interworking(Technical Submodule),Presentation Overview,Frame Relay PVC to ATM Network InterworkingFRF.5Scenario 1 and 2SVC Interworking PlannedFrame Relay PVC to ATM
2、Service InterworkingFRF.8Transparent and Translation ModesSVC Interworking Planned,Approaches To Interworking,The Protocol In and Out of the Network is Frame RelayATM is Used in the Core of the Network to Improve Scalability and Economies of Scale,FRAME RELAY,ATM,FRAME RELAY,ATM,FRAME RELAY,FR UNI,F
3、R UNI,Network Interworking,Each Location Uses the Technology Best Suited to its Applications and NeedsThe Interworking Function Converts Transparently Between the Protocols,FR,ATM,Frame Relay,ATM,FRAME RELAY,ATM,UNI,UNI,Service Interworking,Fast Growth of Frame Relay ServicesConcentration of Low Spe
4、ed Remote ConnectionsHybrid Networks,The Need For Interworking,Frame Relay is Driving the Deployment of ATM NetworksHigh Speed ATM Backbones Used by Service Providers to Improve Economies of Scale and Network ScalabilityUses Network Interworking,Fast Growth Of Frame Relay Services,Connectivity Need,
5、1.5-45Mbps,256K-45Mbps,56K-1.5M,9.6-256 Kbps,HQ,Regional HQ&Data Processing,Small Remote Offices,Mobile Workers&Telecommuters,FR orATM,FR orATM,FR,FRDialup,Service,Corporate Organization,Concentration Of Low Speed Remote Sites,Allows High Speed Access at Main Location,Low Speed Access at Remote Site
6、sEnsures Each Site is Provided a Solution that Delivers the Best Price PerformanceLowers Overall Cost of Network Ownership Requires Service Interworking,56K,Dial Access,1.5M,768K,256K,ISDN,45M,56K,ATM,Frame Relay,1.5M,Remote Site Concentration Example,Hybrid Networks Combine Frame Relay,ATM,and Priv
7、ate Lines to Optimize Price/Performance,56K,Dial Access,1.5M,768K,256K,ISDN,45M,56K,ATM,Frame Relay,1.5M,45M,DS-3,DS-3,Hybrid Networks,Provides Investment ProtectionConnectivity Between Frame Relay and ATM LocationsSmooth Evolution Between TechnologiesImproves Network ScalabilityLowers Cost of Netwo
8、rk OwnershipEnsures Optimization of Network Price/Performance on a Site by Site Basis,The Benefits Of Interworking,Networking InterworkingScenario 1Scenario 2Service InterworkingTransparent ModeTranslation Mode,A Technical View Of Interworking,Standards UpdateFrame Relay Forum FRF.5ITU I.555RFC 1490
9、 is Used at Both CPE End Points,IWF:Interworking Function,FR/ATM PVC Network Interworking Scenario 1,Standards UpdateFrame Relay Forum FRF.5ITU I.555RFC 1490 is Used at Both CPE End Points,IWF:Interworking Function,FR/ATM PVC Network Interworking Scenario 2,Standards UpdateFrame Relay Forum FRF.8ITU
10、 I.555,Transparent Payload Transport(No Protocol Processing)ATM AAL5-CPCS(FR Headers NOT Preserved),Q.922Core,PHY,PHY,ATM,SAR,CPCS,Null SSCS,IWF:Interworking Function,FR/ATM Service InterworkingTransparent Mode,Standards UpdateFrame Relay Forum FRF.8ITU I.555,IWF:Interworking Function,FR/ATM PVC Service Interworking Translation Mode,
