1. ITU-T Workshop on IP/Optical Chitose, 9-11 July 2002 Session 11 -- Network Performance N eal 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)

2. 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

3. 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

4. OCh OMS OTS OCh OMS OTS IP LAYER LINK LAYER PHYSICAL LAYER IP LAYER LINK LAYER PHYSICAL LAYER OPTICAL LAYER PERFORMANCE ? IP LAYER PERFORMANCE (Y.1540, Y.1541) IP ROUTER NETWORK OTN OPTICAL CONTROL AND MANAGEMENT PLANE IP CONTROL AND MANAGEMENT PLANE IP CONTROL AND MANAGEMENT PLANE PROTOCOLS ? RELATIONSHIPS ? Combined Protocol Layer and Technology Domain Views (and Some Performance Management Issues to be Resolved) ??

5. Primary Performanc e Parameters Primary Performanc e Parameters Access Transfer Disengagement SpeedAccuracyDependability Function Criterion (Decision Parameters) AvailableUnavailable Availability Parameters User Network (Parameter Defining Reference Events) User NI Traditional SG 13/WP 4 Performance Model

6. Performance Parameters? Performance Parameters? AvailableUnavailable Availability Parameters? (Decision Parameters?) Application in Defining Optical Network Performance IP User Switched Optical Core Network (Reference Events?) NI? IP Router Client Network IP Router Client Network

7. 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

8. 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

9. 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

10. Network Performance (IP/Optical) Session Plan Topic Time Introduction 10 minutes 3 Presentations 60 Open Discussion15 Wrap Up, Action Items 5 90 minutes