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Overview

PRACTICAL BGP

“I would recommend this book to network engineers, Internet service providers, network software developers, and IT staff who need to deal with network planning and routing.”

–Enke Chen, Redback Networks

Hands-on guidance for deploying and optimizing BGP networks–enterprise and ISP

Now there’s a practical guide to deploying and managing BGPv4 in any environment–from small enterprises to the largest Tier 2 and Tier 3 service providers. A team of the world’s leading BGP experts brings together powerful insights into network design, configuration, and deployment with the latest version of BGP–including hands-on guidance for leveraging its key enhancements. Coverage includes

• Best practices and diverse real-world scenarios for applying BGPv4

• Understanding the impact of BGP design on local networks and the global Internet backbone

• Building effective BGP policies: aggregation, propagation, accounting, and more

• Maximizing scalability and performance in BGPv4 networks

• BGP and network security, including Secure Origin BGP

• Deploying BGP/MPLS Layer 3 VPNs

Extensive troubleshooting guidance unavailable in any other book

If you’re a network engineer or administrator looking to drive maximum reliability and performance from BGP-based networks, Practical BGP will help you get the job done–from start to finish.

RUSS WHITE is a Network Protocols Deployment Engineer in Cisco Systems Routing DNA Team specializing in routing protocols. A widely recognized expert in networking, he co-chairs the IETF Routing Protocols Security working group, and co-authored Advanced IP Network Design, IS—IS for IP Networks, and Inside Cisco IOS Software Architecture.

DANNY McPHERSON is a member of the Architecture Team at Arbor Networks. He has held technical leadership positions with several global ISPs, is active within the IETF, and is an acknowledged expert in Internet architecture and security. He co-authored Internet Routing Architectures, Second Edition.

SRIHARI SANGLI, Senior Manager for MPLS and routing development at Procket Networks, was formerly Senior Technical Leader in Cisco’s IOS Routing Protocols group. He, along with others at Cisco, coded the industry-first implementation of BGP/MPLS based Layer-3 VPN.

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Product Details

  • ISBN-13: 9780321127006
  • Publisher: Addison-Wesley
  • Publication date: 7/23/2004
  • Edition description: New Edition
  • Edition number: 1
  • Pages: 434
  • Sales rank: 1,047,843
  • Product dimensions: 7.00 (w) x 9.20 (h) x 0.90 (d)

Meet the Author

RUSS WHITE is a Network Protocols Deployment Engineer in Cisco Systems Routing DNA Team specializing in routing protocols. A widely recognized expert in networking, he co-chairs the IETF Routing Protocols Security working group, and co-authored Advanced IP Network Design, IS—IS for IP Networks, and Inside Cisco IOS Software Architecture.

DANNY McPHERSON is a member of the Architecture Team at Arbor Networks. He has held technical leadership positions with several global ISPs, is active within the IETF, and is an acknowledged expert in Internet architecture and security. He co-authored Internet Routing Architectures, Second Edition.

SRIHARI SANGLI, Senior Manager for MPLS and routing development at Procket Networks, was formerly Senior Technical Leader in Cisco’s IOS Routing Protocols group. He, along with others at Cisco, coded the industry-first implementation of BGP/MPLS based Layer-3 VPN.

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Table of Contents

Foreword.

Preface.

1. The Border Gateway Protocol.

Exterior and Interior Gateway Protocols.

Distance Vector, Link State , and Path Vector.

BGP Path Vector Implementation.

BGP Peering.

BGP Attributes.

BGP’s Best Path Algorithm.

Review Questions.

2. BGP at the Edge.

Connecting to a Service Provider.

Single Homing to a Service Provider.

Dual Homing to a Single Service Provider.

Dual Homing to Multiple Service Providers.

Controlling Outbound Traffic Flow.

Forcing Symmetric Entry and Exit Points.

Intelligent Routing.

Considerations for All Service Provider Peering Situations.

Review Questions.

3. Scaling the Enterprise Using BGP.

BGP Cores.

Implementing a BGP Core.

External Connections.

Review Questions.

4. Core Design with iBGP.

Full Mesh iBGP Cores.

Route Reflectors.

BGP Confederations.

Review Questions.

5. BGP Performance.

Peer Groups.

Update Packing.

Timers.

Transport-Level Issues.

Review Questions.

6. BGP Policy.

Policy Instruments.

Local Preference.

Communities in Practice–RFC 1998 and Other Routing Policies.

Safety Nets.

The AS Path.

Route Flap Damping.

Outbound Route Filtering.

BGP MED Deployment Considerations.

Review Questions.

7. New Features in BGP.

BGP Custom Decision Process.

Controlling Redistribution at Remote Points.

Multipath.

BGP Graceful Restart.

Interaction with Interior Gateway Protocols during Convergence.

Inbound Route Summarization.

Conditional Communities.

Flexible Communities.

Outbound Route Filtering.

Review Questions.

8. Troubleshooting BGP.

Establishing Neighbors.

Update Exchange.

Inconsistent Routing.

Next Hop Recursion Oscillation.

Route Churn.

Review Questions.

9. BGP and Network Security.

Protecting Peering Relationships.

Preventing Spoofing at the Edge.

Securing Routing Information within BGP.

Review Questions.

10. Deploying BGP/MPLS Layer-3 VPNs.

What Is a Virtual Private Network?

The BGP/MPLS-Based VPN.

Putting It Together: An MPLS/BGP VPN Example.

VPN Topologies.

VPN Service Provider Deployment Considerations.

Conclusion.

Review Questions.

Appendix A. Answers to the Review Questions.

Index.

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Preface

Practical BGP

Preface

"Experience is the best teacher" is a valuable truism in network design, especially in designing a routed network using a protocol as widespread, and as little understood, as the Border Gateway Protocol (BGP). It's hard to grasp BGP at a high level, because network engineers tend to see only a small piece of the system they are interacting with—either their connection to the Internet, or their network backbone, or some other slice. From this perspective, it's hard to understand how BGP works in the real world, and what impact decisions in one small slice of the network will actually have in the larger internetwork.

How, for instance, does BGP express policy? And what is the difference between a routing protocol that expresses policy versus one that "just" provides routing information? When should I use BGP, and when should I not? What are the most common policy mechanisms used in BGP, and how are they expressed? What do I do when everything falls apart?

These, and many other questions, are the questions we set out to answer in this book. So, while this is a book about BGP, it's actually a book about network design and deployment. We hope, through this book, you can learn from our experience in deploying BGP, both our failures and our successes, in all types of environments, from small enterprise networks to large-scale service providers. In Practical BGP, you will find help in deciding where to use BGP and where not to, as well as techniques for designing, deploying, managing, and troubleshooting BGP networks.

We hope you enjoy the fruit of our labors and experience (and not just for its ability to put you to sleep).

Russ White

Danny McPherson

Sangli Srihari

© Copyright Pearson Education. All rights reserved.

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Introduction

Practical BGP

Preface

"Experience is the best teacher" is a valuable truism in network design, especially in designing a routed network using a protocol as widespread, and as little understood, as the Border Gateway Protocol (BGP). It's hard to grasp BGP at a high level, because network engineers tend to see only a small piece of the system they are interacting with—either their connection to the Internet, or their network backbone, or some other slice. From this perspective, it's hard to understand how BGP works in the real world, and what impact decisions in one small slice of the network will actually have in the larger internetwork.

How, for instance, does BGP express policy? And what is the difference between a routing protocol that expresses policy versus one that "just" provides routing information? When should I use BGP, and when should I not? What are the most common policy mechanisms used in BGP, and how are they expressed? What do I do when everything falls apart?

These, and many other questions, are the questions we set out to answer in this book. So, while this is a book about BGP, it's actually a book about network design and deployment. We hope, through this book, you can learn from our experience in deploying BGP, both our failures and our successes, in all types of environments, from small enterprise networks to large-scale service providers. In Practical BGP, you will find help in deciding where to use BGP and where not to, as well as techniques for designing, deploying, managing, and troubleshooting BGP networks.

We hope you enjoy the fruit of our labors and experience (and not just for itsability to put you to sleep).

Russ White

Danny McPherson

Sangli Srihari

Read More Show Less

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