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QOS-Enabled Networks Tools and Foundations

ISBN-10: 0470686979

ISBN-13: 9780470686973

Edition: 2011

Authors: Peter Lundqvist, Miguel Barreiros

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Description:

This book discusses the theory of Quality of Service (QoS) mechanisms in packet networks and shows how to apply them in practiceQOS-Enabled Networks: Tools and Foundations provide s an understanding of the theory of QOS mechanisms in packet networks and how to apply them in practice. It explain s QOS management features found in modern routers used by Internet Service Providers ( ISP) and large companies. The goal of this book is to provide the background and tools to help network managers and engineers configure production networks for providing services with quality of service (QOS) guarantees. The authors underline the bookrs"s focus on providing an understanding of network behavior ("real effects") related to configuration of network elements (routers and switches) rather than just a description of such configuration. They also emphasize their vendor-agnostic approach in contrast with other existing and cited books on the subject.The book is divided into three parts: 1) Foundations (QOS signaling and operation, Risks and solutions, QOS building blocks, QOS network, Historical evolution and standards, 2) Tools (QOS packets handling, Traffic classification, Policing and shaping, Queuing and scheduling, rewrite rules), 3) End to End (QOS in one router, QOS in one network, Case studies, Future)
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Book details

Copyright year: 2011
Publisher: John Wiley & Sons, Limited
Publication date: 12/31/2010
Binding: Hardcover
Pages: 244
Size: 6.00" wide x 10.00" long x 0.75" tall
Weight: 1.298
Language: English

About the Authors
Foreword
Preface
Acknowledgments
Abbreviations
The QOS Realm
The QOS World
Operation and Signaling
Standards and Per-Hop Behavior
Traffic Characterization
A Router Without QOS
Conclusion
References
Further Reading
The QOS Tools
Classifiers and Classes of Service
Metering and Coloring - CIR/PIR Model
The Policer Tool
The Shaper Function
Comparing Policing and Shaping
Queue
The Scheduler
The Rewrite Tool
Example of Combining Tools
Delay and Jitter Insertion
Packet Loss
Conclusion
References
Challenges
Defining the Classes of Service
Classes of Service and Queues Mapping
Inherent Delay Factors
Congestion Points
Trust Borders
Granularity Levels
Control Traffic
Trust, Granularity, and Control Traffic
Conclusion
Further Reading
Traffic Types
Anatomy of the TCP Protocol
The TCP Session
TCP Congestion Mechanism
TCP Congestion Scenario
PMTU
QOS Conclusions for TCP
Real-Time Traffic
Anatomy of Real-Time Traffic
RTP
VOIP
QOS Conclusions for VOIP
IPTV
Long-lasting versus Short-lived Sessions
Example of Internet Radio/Video
Example of Peer-to-Peer (P2P) Applications
Discovering P2P on the Network
Illegal File Sharing and Copyright Violation
QOS Conclusions for New Internet Applications
References
Further Reading
Tools
Classifiers
Packet QOS Markings
Inbound Interface Information
Deep Packet Inspection
Selecting Classifiers
The QOS Network Perspective
MPLS DiffServ-TE
Mixing Different QOS Realms
Conclusion
References
Policing and Shaping
Token Buckets
Traffic Bursts
Dual-Rate Token Buckets
Shapers and Leaky Buckets
Excess Traffic and Oversubscription
Comparing and Applying Policer and Shaper Tools
Conclusion
References
Queuing and Scheduling
Queuing and Scheduling Concepts
Packets and Cellification
Different Types of Queuing Disciplines
FIFO - First in, First out
Fair Queuing
Priority Queuing
Weighted Fair Queuing
Weighted Round Robin
Deficit Weighted Round Robin
Priority-Based Deficit Weighted Round Robin
Conclusions about the Best Queuing Discipline
Further Reading
Advanced Queuing Topics
Hierarchical Scheduling
Queues Lengths and Buffer Size
Dynamically Sized versus Fixed-Size Queue Buffers
RED - Random Early Discard
Using RED with TCP Sessions
Differentiating Traffic Inside a Queue with WRED
Head versus Tail RED
Segmented and Interpolated RED Profiles
Conclusion
Further Reading
Case Studies
The VPLS Case Study
High-Level Case Study Overview
Virtual Private Networks
Service Overview
Service Technical Implementation
Network Internals
Classes of Service and Queue Mapping
Classification and Trust Borders
Admission Control
Rewrite Rules
Absorbing Traffic Bursts at the Egress
Queues and Scheduling at Core-Facing Interfaces
Queues and Scheduling at Customer-Facing Interfaces
Tracing a Packet Through the Network
Adding More Services
Multicast Traffic
Using Bandwidth Reservations
Conclusion
Further Reading
Case Study IP RAN and Mobile Backhaul QOS
Evolution from 2G to 4G
2G Network Components
Traffic on 2G Networks
3G Network Components
Traffic on 3G Networks
LTE Network Components
LTE Traffic Types
LTE Traffic Classes
Conclusion
References
Further Reading
Conclusion
Index