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IP Quality of Service

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Description

  • Copyright 2001
  • Dimensions: 7-3/8" x 9-1/8"
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 1-58705-433-7
  • ISBN-13: 978-1-58705-433-4

The complete resource for understanding and deploying IP quality of service for Cisco networks

Learn to deliver and deploy IP QoS and MPLS-based traffic engineering by understanding:

  • QoS fundamentals and the need for IP QoS
  • The Differentiated Services QoS architecture and its enabling QoS functionality
  • The Integrated Services QoS model and its enabling QoS functions
  • ATM, Frame Relay, and IEEE 802.1p/802.1Q QoS technologies and how they work with IP QoS
  • MPLS and MPLS VPN QoS and how they work with IP QoS
  • MPLS traffic engineering
  • Routing policies, general IP QoS functions, and other miscellaneous QoS information

Quality-of-service (QoS) technologies provide networks with greater reliability in delivering applications, as well as control over access, delay, loss, content quality, and bandwidth. IP QoS functions are crucial in today's scalable IP networks. These networks are designed to deliver reliable and differentiated Internet services by enabling network operators to control network resources and use. Network planners, designers, and engineers need a thorough understanding of QoS concepts and features to enable their networks to run at maximum efficiency and to deliver the new generation of time-critical multimedia and voice applications.

IP Quality of Service serves as an essential resource and design guide for anyone planning to deploy QoS services in Cisco networks. Author Srinivas Vegesna provides complete coverage of Cisco IP QoS features and functions, including case studies and configuration examples. The emphasis is on real-world application-going beyond conceptual explanations to teach actual deployment.

IP Quality of Service is written for internetworking professionals who are responsible for designing and maintaining IP services for corporate intranets and for service provider network infrastructures. If you are a network engineer, architect, manager, planner, or operator who has a rudimentary knowledge of QoS technologies, this book will provide you with practical insights on what you need to consider when designing and implementing various degrees of QoS in the network. Because incorporating some measure of QoS is an integral part of any network design process, IP Quality of Service applies to all IP networks-corporate intranets, service provider networks, and the Internet.

Sample Content

Table of Contents

I. IP QOS.

1. Introducing IP Quality of Service.

Levels of QoS. IP QoS History. Performance Measures. QoS Functions. Layer 2 QoS Technologies. Multiprotocol Label Switching. End-to-End QoS. Objectives. Audience. Scope and Limitations. Organization.

2. Differentiated Services Architecture.

Intserv Architecture. Diffserv Architecture.

3. Network Boundary Traffic Conditioners: Packet Classifier, Marker, and Traffic Rate Management.

Packet Classification. Packet Marking. The Need for Traffic Rate Management. Traffic Policing. Traffic Shaping.

4. Per-Hop Behavior: Resource Allocation I.

Scheduling for Quality of Service (QoS) Support. Sequence Number Computation-Based WFQ. Flow-Based WFQ. Flow-Based Distributed WFQ (DWFQ). Class-Based WFQ. Priority Queuing. Custom Queuing. Scheduling Mechanisms for Voice Traffic.

5. Per-Hop Behavior: Resource Allocation II.

Modified Weighted Round Robin (MWRR). Modified Deficit Round Robin (MDRR). MDRR Implementation.

6. Per-Hop Behavior: Congestion Avoidance and Packet Drop Policy.

TCP Slow Start and Congestion Avoidance. TCP Traffic Behavior in a Tail-Drop Scenario. RED—Proactive Queue Management for Congestion Avoidance. WRED. Flow WRED. ECN. SPD.

7. Integrated Services: RSVP.

RSVP. Reservation Styles. Service Types. RSVP Media Support. RSVP Scalability. Case Study 7-1: Reserving End-to-End Bandwidth for an Application Using RSVP. Case Study 7-2: RSVP for VoIP.

II. LAYER 2, MPLS QOS—INTERWORKING WITH IP QOS.

8. Layer 2 QoS: Interworking with IP QoS.

ATM. ATM Interworking with IP QoS. Frame Relay. Frame Relay Interworking with IP QoS. The IEEE 802.3 Family of LANs.

9. QoS in MPLS-Based Networks.

MPLS. MPLS with ATM. Case Study 9-1: Downstream Label Distribution. MPLS QoS. End-to-End IP QoS. MPLS VPN. Case Study 9-3: MPLS VPN. MPLS VPN QoS. Case Study 9-4: MPLS VPN QoS.

III. TRAFFIC ENGINEERING.

10. MPLS Traffic Engineering.

The Layer 2 Overlay Model. RRR. TE Trunk Definition. TE Tunnel Attributes. Link Resource Attributes. Distribution of Link Resource Information. Path Selection Policy. TE Tunnel Setup. Link Admission Control. TE Path Maintenance. TE-RSVP. IGP Routing Protocol Extensions. TE Approaches. Case Study 10-1: MPLS TE Tunnel Setup and Operation.

IV. APPENDIXES.

Appendix A: Cisco Modular QoS Command-Line Interface.

Traffic Class Definition. Policy Definition. Policy Application. Order of Policy Execution.

Appendix B: Appendix B Packet Switching Mechanisms.

Process Switching. Route-Cache Forwarding. CEF.

Appendix C: Routing Policies.

Using QoS Policies to Make Routing Decisions. QoS Policy Propagation Using BGP.

Appendix D: Real-time Transport Protocol (RTP).
Appendix E: General IP Line Efficiency Functions.

The Nagle Algorithm. Path MTU Discovery. TCP/IP Header Compression. RTP Header Compression.

Appendix F: Link-Layer Fragmentation and Interleaving.
Appendix G: IP Precedence and DSCP Values.

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