IP Quality of Service

IP Quality of Service

by Srinivas Vegesna
Released January 2001
Publisher(s): Cisco Press
ISBN: 1578701163

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Book description

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.

Table of contents

  1. Table of Contents (1/2)
  2. Table of Contents (2/2)
  3. Part I: IP QoS
    1. Chapter 1 Introducing IP Quality of Service
      1. Levels of QoS
      2. IP QoS History
      3. Performance Measures
      4. QoS Functions
      5. Layer 2 QoS Technologies
      6. Multiprotocol Label Switching
      7. End-to-End QoS
      8. Objectives
      9. Audience
      10. Scope and Limitations
      11. Organization
      12. References
    2. Chapter 2 Differentiated Services Architecture
      1. Intserv Architecture
      2. Diffserv Architecture (1/2)
      3. Diffserv Architecture (2/2)
      4. Summary
      5. References
    3. Chapter 3 Network Boundary Traffic Conditioners: Packet Classifier, Marker, and Traffic Rate Management
      1. Packet Classification
      2. Packet Marking
      3. The Need for Traffic Rate Management
      4. Traffic Policing (1/2)
      5. Traffic Policing (2/2)
      6. Traffic Shaping (1/2)
      7. Traffic Shaping (2/2)
      8. Summary
      9. Frequently Asked Questions
      10. References
    4. Chapter 4 Per-Hop Behavior: Resource Allocation I
      1. Scheduling for Quality of Service (QoS) Support
      2. Sequence Number Computation-Based WFQ
      3. Flow-Based WFQ (1/2)
      4. Flow-Based WFQ (2/2)
      5. Flow-Based Distributed WFQ (DWFQ)
      6. Class-Based WFQ (1/2)
      7. Class-Based WFQ (2/2)
      8. Priority Queuing
      9. Custom Queuing
      10. Scheduling Mechanisms for Voice Traffic
      11. Summary
      12. Frequently Asked Questions
      13. References
    5. Chapter 5 Per-Hop Behavior: Resource Allocation II
      1. Modified Weighted Round Robin (MWRR)
      2. Modified Deficit Round Robin (MDRR)
      3. MDRR Implementation
      4. Summary
      5. Frequently Asked Questions
      6. References
    6. Chapter 6 Per-Hop Behavior: Congestion Avoidance and Packet Drop Policy
      1. TCP Slow Start and Congestion Avoidance
      2. TCP Traffic Behavior in a Tail-Drop Scenario
      3. RED—Proactive Queue Management for Congestion Avoidance
      4. WRED
      5. Flow WRED
      6. ECN
      7. SPD
      8. Summary
      9. Frequently Asked Questions
      10. References
    7. Chapter 7 Integrated Services: RSVP
      1. RSVP
      2. Reservation Styles
      3. Service Types
      4. RSVP Media Support
      5. RSVP Scalability
      6. Case Study 7-1: Reserving End-to-End Bandwidth for an Application Using RSVP
      7. Case Study 7-2: RSVP for VoIP
      8. Summary
      9. Frequently Asked Questions
      10. References
  4. Part II: Layer 2, MPLS QoS—Interworking with IP QoS
    1. Chapter 8 Layer 2 QoS: Interworking with IP QoS
      1. ATM
      2. ATM Interworking with IP QoS (1/2)
      3. ATM Interworking with IP QoS (2/2)
      4. Frame Relay (1/2)
      5. Frame Relay (2/2)
      6. Frame Relay Interworking with IP QoS (1/2)
      7. Frame Relay Interworking with IP QoS (2/2)
      8. The IEEE 802.3 Family of LANs (1/2)
      9. The IEEE 802.3 Family of LANs (2/2)
      10. Summary
      11. Frequently Asked Questions
      12. References
    2. Chapter 9 QoS in MPLS-Based Networks
      1. MPLS
      2. MPLS with ATM
      3. Case Study 9-1: Downstream Label Distribution
      4. MPLS QoS
      5. End-to-End IP QoS
      6. MPLS VPN
      7. Case Study 9-3: MPLS VPN (1/2)
      8. Case Study 9-3: MPLS VPN (2/2)
      9. MPLS VPN QoS
      10. Case Study 9-4: MPLS VPN QoS
      11. Summary
      12. Frequently Asked Questions
      13. References
  5. Part III: Traffic Engineering
    1. Chapter 10 MPLS Traffic Engineering
      1. The Layer 2 Overlay Model
      2. RRR
      3. TE Trunk Definition
      4. TE Tunnel Attributes
      5. Link Resource Attributes
      6. Distribution of Link Resource Information
      7. Path Selection Policy
      8. TE Tunnel Setup
      9. Link Admission Control
      10. TE Path Maintenance
      11. TE-RSVP
      12. IGP Routing Protocol Extensions
      13. TE Approaches
      14. Case Study 10-1: MPLS TE Tunnel Setup and Operation
      15. Summary
      16. Frequently Asked Questions
      17. References
  6. Part IV: Appendixes
    1. Appendix A: Cisco Modular QoS Command-Line Interface
      1. Traffic Class Definition
      2. Policy Definition
      3. Policy Application
      4. Order of Policy Execution
    2. Appendix B: Packet Switching Mechanisms
      1. Process Switching
      2. Route-Cache Forwarding
      3. CEF (1/2)
      4. CEF (2/2)
      5. Summary
    3. Appendix C: Routing Policies
      1. Using QoS Policies to Make Routing Decisions
      2. QoS Policy Propagation Using BGP
      3. Summary
      4. References
    4. Appendix D: Real-time Transport Protocol (RTP)
      1. Reference
    5. Appendix E: General IP Line Efficiency Functions
      1. The Nagle Algorithm
      2. Path MTU Discovery
      3. TCP/IP Header Compression
      4. RTP Header Compression
      5. References
    6. Appendix F: Link-Layer Fragmentation and Interleaving
      1. Reference
    7. Appendix G: IP Precedence and DSCP Values
  7. Index
    1. A
    2. B
    3. C
    4. D
    5. E
    6. F
    7. G
    8. H
    9. I
    10. J-K-L
    11. M
    12. N
    13. O
    14. P
    15. Q
    16. R
    17. S
    18. T
    19. U
    20. V
    21. W

Product information

  • Title: IP Quality of Service
  • Author(s): Srinivas Vegesna
  • Release date: January 2001
  • Publisher(s): Cisco Press
  • ISBN: 1578701163