With the integration of voice, video, and data over networks, quality of service has become a hot topic recently. A number of solutions have been proposed at various standards bodies including IEEE 802.3, IETF, and ATM Forum. ATM Forum has designed service categories; IEEE 802.3 is incorporating priorities in LANs; IETF initially worked on integrated services and RSVP and recently moved on to differentiated services for IP users. These approaches will be briefly explained. The key issue is which of these approaches are realistic for users and at the same time achievable for service providers and network designers. The strength and weeknesses of each of these approaches will be discussed in this presentation.

This talk covers the following topics:

• QoS Triangle
• What is QoS?
• ATM Service Categories
• ATM QoS
• ATM QoS: Issues
• Integrated Services
• RSVP
• After
• Problems with RSVP and Integrated Services
• Differentiated Services
• Service
• Per-hop Behaviors
• Expedited Forwarding
• Assured Forwarding
• AF Simulation Results
• On Drop Preferences
• Multiprotocol Label Switching
• Traffic Engineering Objectives
• MPLS Mechanisms for TE
• Traffic Trunks
• Trunks vs LSPs
• Flows, Trunks, LSPs, and Links
• MPLS Simulation Results
• Bandwidth Broker
• IEEE 802.1D Model
• End-to-end View
• QoS Debate Issues
• Comparison of QoS Approaches
• Summary
• References

Presentation slides in Adobe Acrobat Format: 1 slide/page