Download ITU-T Workshop on IP/Optical Session 11: Network Performance

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