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ITU-T Workshop on IP/Optical Chitose, 9-11 July 2002 Session 11 -- Network Performance Neal Seitz, Chair SG 13/WP 4 • IP Performance Specifications: Progress and Next Steps -- Al Morton, AT&T (SGs 13, 12, IETF) • Relating Optical Layer and IP Client Performance -- Peter Huckett, Acterna (SGs 4, 13, 15, TMForum) • IP/Optical Network Performance Management --Tobey Trygar, Telcordia (SGs 15, 4, TMForum) IP/Optical Networks: Motivation • Infrastructure Attributes – Optical core, IP router clients, IP end users – All types of application data carried in IP packets – MPLS based network management and control • Essential Capabilities – Dynamic resource reservation – Multi-layer traffic engineering – Automatic protection switching, path restoration • Operational Benefits – Lower network deployment and management costs – Faster optical path provisioning and restoral – Enhanced service creation, new applications IP/Optical Networks: Performance Benefits and Challenges • Performance Benefits – – – – Increased (and more reconfigurable) transmission capacity Reduced packet transfer delay, delay variation, loss, error Lower “call” set up delays and blocking probabilities Improved service availability • Performance Challenges – – – – – Define ASON/OTN performance parameters and objectives Relate ASON/OTN and IP network performance measures Specify interoperable performance signaling protocols Relate IP user/client requirements with control mechanisms Define compatible network management strategies Combined Protocol Layer and Technology Domain Views (and Some Performance Management Issues to be Resolved) IP CONTROL AND MANAGEMENT PLANE ? OPTICAL CONTROL AND MANAGEMENT PLANE PROTOCOLS ? IP LAYER LINK LAYER PHYSICAL LAYER IP ROUTER NETWORK ? PROTOCOLS ? IP LAYER PERFORMANCE (Y.1540, Y.1541) RELATIONSHIPS ? MANAGEMENT PLANE PROTOCOLS ? IP LAYER LINK LAYER OCh OCh OMS OMS OTS OTS OTN IP CONTROL AND PHYSICAL LAYER IP ROUTER NETWORK Traditional SG 13/WP 4 Performance Model NI NI User User Network (Parameter Defining Reference Events) Criterion Speed Function Accuracy Dependability Access Transfer Disengagement Primary Performanc e Parameters (Decision Parameters) Available Unavailable Application in Defining Optical Network Performance IP User IP Router “Client” Network NI? Switched Optical “Core” Network NI? IP Router “Client” Network (Reference Events?) Performance Parameters? (Decision Parameters?) Available Unavailable IP User Possible Discussion Topics: IP Performance Specifications • Performance Parameters, Objectives, and QoS Classes – Current IP network applications (FTP, e-mail, browsing, …) – Planned real-time services (VoIP, video conferencing, …) – New applications enabled by IP/Optical infrastructures • • • • Allocation of Performance Limits Among Providers Performance Monitoring (In and Out of Service) Mechanisms for Providing Assured-Quality Services Localization of IP Network Failures Possible Discussion Topics: Relating Optical Layer and IP Client Performance • Performance Model for ASON/IP Client Interactions – Interfaces, reference events, functions, parameters – Service classes, service level agreements (SLAs) • • • • Allocation of Performance Limits Among Providers Performance Monitoring (In and Out of Service) Mechanisms for Providing Assured-Quality Services Localization of Optical Network Failures Possible Discussion Topics: Performance Management and Interworking • Alternative Views of a Service Delivery Network – Layered protocol/transmission signal view – Network domain view (technology, jurisdiction, routing) • Mechanisms for Performance (and Capacity) Control – Between IP end users and “client” IP router networks – Between IP clients and switched optical core networks – Among layers within IP and optical technology domains • Performance Management Interworking Among Layers – Performance monitoring, failure localization – Protection, restoration, OAM&P Network Performance (IP/Optical) Session Plan Topic Introduction 3 Presentations Open Discussion Wrap Up, Action Items Time 10 minutes 60 15 5 90 minutes