Traffic Engineering with MPLS
By Eric Osborne CCIE #4122, Ajay Simha CCIE #2970
Publisher: Cisco Press Pub Date: July 17, 2002 ISBN: 1-58705-031-5 Pages: 608 Slots: 2
Design, configure, and manage MPLS TE to optimize network performance.
Almost every busy network backbone has some congested links while others remain underutilized. That's because shortest-path routing protocols send traffic down the path that is shortest without considering other network parameters, such as utilization and traffic demands. Using Traffic Engineering (TE), network operators can redistribute packet flows to attain more uniform distribution across all links. Forcing traffic onto specific pathways allows you to get the most out of your existing network capacity while making it easier to deliver consistent service levels to customers at the same time.
Cisco(r) Multiprotocol Label Switching (MPLS) lends efficiency to very large networks, and is the most effective way to implement TE. MPLS TE routes traffic flows across the network by aligning resources required by a given flow with actual backbone capacity and topology. This constraint-based routing approach feeds the network route traffic down one or more pathways, preventing unexpected congestion and enabling recovery from link or node failures.
Traffic Engineering with MPLS provides you with information on how to use MPLS TE and associated features to maximize network bandwidth. This book focuses on real-world applications, from design scenarios to feature configurations to tools that can be used in managing and troubleshooting MPLS TE. Assuming some familiarity with basic label operations, this guide focuses mainly on the operational aspects of MPLS TE-how the various pieces work and how to configure and troubleshoot them. Additionally, this book addresses design and scalability issues along with extensive deployment tips to help you roll out MPLS TE on your own network.
• Understand the background of TE and MPLS, and brush up on MPLS forwarding basics
• Learn about router information distribution and how to bring up MPLS TE tunnels in a network
• Understand MPLS TE's Constrained Shortest Path First (CSPF) and mechanisms you can use to influence CSPF's path calculation
• Use the Resource Reservation Protocol (RSVP) to implement Label-Switched Path setup
• Use various mechanisms to forward traffic down a tunnel
• Integrate MPLS into the IP quality of service (QoS) spectrum of services
• Utilize Fast Reroute (FRR) to mitigate packet loss associated with link and node failures
• Understand Simple Network Management Protocol (SNMP)-based measurement and accounting services that are available for MPLS
• Evaluate design scenarios for scalable MPLS TE deployments
• Manage MPLS TE networks by examining common configuration mistakes and utilizing tools for troubleshooting MPLS TE problems
• Table of Contents
Traffic Engineering with MPLS
By Eric Osborne CCIE #4122, Ajay Simha CCIE #2970
Publisher: Cisco Press Pub Date: July 17, 2002 ISBN: 1-58705-031-5 Pages: 608 Slots: 2
Copyright About the Authors
About the Technical Reviewers Acknowledgments
Command Syntax Conventions Foreword Introduction
Who Should Read This Book? How This Book Is Organized Chapter 1. Understanding Traffic Engineering with MPLS Basic Networking Concepts What Is Traffic Engineering? Traffic Engineering Before MPLS Enter MPLS
Using MPLS TE in Real Life Summary Chapter 2. MPLS Forwarding Basics MPLS Terminology Forwarding Fundamentals Label Distribution Protocol Label Distribution Protocol Configuration Summary Chapter 3. Information Distribution
MPLS Traffic Engineering Configuration What Information Is Distributed When Information Is Distributed How Information Is Distributed Summary
Chapter 4. Path Calculation and Setup
How SPF Works
How CSPF Works
Tunnel Reoptimization
Resource Reservation Protocol (RSVP)
Interarea Tunnels
Link Manager
Summary
Chapter 5. Forwarding Traffic Down Tunnels
Forwarding Traffic Down Tunnels Using Static Routes
Forwarding Traffic Down Tunnels with Policy-Based Routing
Forwarding Traffic Down Tunnels with Autoroute
Load Sharing
Forwarding Adjacency
Automatic Bandwidth Adjustment
Summary
Chapter 6. Quality of Service with MPLS TE The DiffServ Architecture A Quick MQC Review DiffServ and IP Packets DiffServ and MPLS Packets Label Stack Treatment Tunnel Modes
DiffServ-Aware Traffic Engineering (DS-TE) Forwarding DS-TE Traffic Down a Tunnel Summary
Chapter 7. Protection and Restoration The Need for Fast Reroute What Is Protection? Types of Protection Link Protection Node Protection Advanced Protection Issues Summary
Chapter 8. MPLS TE Management MPLS LSR MIB MPLS TE MIB Summary
Chapter 9. Network Design with MPLS TE Sample Network for Case Studies Different Types of TE Design Tactical TE Design Online Strategic TE Design Offline Strategic TE Design Protection Scalability Forwarding Adjacency Scalability Summary
Chapter 10. MPLS TE Deployment Tips
Bandwidth and Delay Measurements Fine-Tuning MPLS TE Parameters Migrating IS-IS from Narrow to Wide Metrics TE and Multicast Tunnel Identification Schemes Combining MPLS TE with MPLS VPNs Deployment Possibilities Summary
Chapter 11. Troubleshooting MPLS TE Common Configuration Mistakes Tools for Troubleshooting MPLS TE Problems Finding the Root Cause of the Problem Summary
Appendix A. MPLS TE Command Index show Commands EXEC Commands Global Configuration Commands Physical Interface Configuration Commands Tunnel Interface Configuration Commands IGP Configuration Commands RSVP Commands debug Commands Explicit Path Configuration
Appendix B. CCO and Other References
Resources for Chapter 1, "Understanding Traffic Engineering with MPLS"
Resources for Chapter 2, "MPLS Forwarding Basics"
Resources for Chapter 3, "Information Distribution"
Resources for Chapter 4, "Path Calculation and Setup"
Resources for Chapter 5, "Forwarding Traffic Down Tunnels"
Resources for Chapter 6, "Quality of Service with MPLS TE"
Resources for Chapter 7, "Protection and Restoration"
Resources for Chapter 8, "MPLS TE Management"
Resources for Chapter 9, "Network Design with MPLS TE"
Resources for Chapter 10, "MPLS TE Deployment Tips"
Resources for Chapter 11, "Troubleshooting MPLS TE"
Index
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