Cisco Press CCIE Professional Development - Advanced IP Network Design.pdf - Cisco Books - Caveman85

Advanced IP Network Design (CCIE

Professional Development)

Alvaro Retana

Don Slice

Russ White

Publisher: Cisco Press

First Edition June 17, 1999

ISBN: 1-57870-097-3, 368 pages

Front Matter

Table of Contents

Index

About the Author

Advanced IP Network Design provides the solutions network

engineers and managers need to grow and stabilize large IP

networks. Technology advancements and corporate growth

inevitably lead to the necessity for network expansion. This

book presents design concepts and techniques that enable

networks to evolve into supporting larger, more complex

applications while maintaining critical stability. Advanced IP

Network Design provides you with a basic foundation to

understand and implement the most efficient network

design around the network core, distribution and access

layers, and the common and edge network services. After

establishing an efficient hierarchical network design, you

will learn to apply OSPF, IS-IS, EIGRP, BGP, NHRP, and

MPLS. Case studies support each protocol to provide you

with valuable solutions to common stumbling blocks

encountered when implementing an IGP- or EGP-based

network.

Advanced IP Network Design (CCIE Professional Development)

About the Authors

About the Technical Reviewers

Acknowledgments

Introduction

What Is Covered

Motivation for the Book

I: Foundation for Stability: Hierarchical Networks

1. Hierarchical Design Principles

Where Do You Start?

The Right Topology

The Network Core

The Distribution Layer

The Access Layer

Connections to Common Services

Summary

Case Study: Is Hierarchy Important in Switched Networks?

Review

2. Addressing & Summarization

Summarization

Strategies for Successful Addressing

IPv6 Addressing

General Principles of Addressing

Summary

Case Study: Default Routes to Interfaces

Case Study: Network Address Translation

Review

3. Redundancy

Issues and Strategies of Redundancy

Core Redundancy

Distribution Redundancy

Access Redundancy

Connections to Common Services

Summary

Case Study: What's the Best Route?

Case Study: Redundancy at Layer 2 Using Switches

Case Study: Dial Backup with a Single Router

Case Study: Dial Backup with Two Routers

Review

4. Applying the Principles of Network Design

Reforming an Unstable Network

Review

II: Scaling with Interior Gateway Protocols

5. OSPF Network Design

Dividing the Network for OSPF Implementation

Case Study: Troubleshooting OSPF Adjacency Problems

Case Study: Which Area Should This Network Be In?

Case Study: Determining the Area in Which to Place a Link

Case Study: Dial Backup

Case Study: OSPF Externals and the Next Hop

Review

6. IS-IS Network Design

Dividing the Network

Analyzing Routers on the DMZ for External Connections

Other Factors in IS-IS Scaling

Troubleshooting IS-IS Neighbor Relationships

Case Study: The Single Area Option

Case Study: The Two-Layer Network

Review

7. EIGRP Network Design

Analyzing the Network Core for Summarization

Analyzing the Network's Distribution Layer for Summarization

Analyzing Routing in the Network's Access Layer

Analyzing Routes to External Connections

Analyzing Routes to the Common Services Area

Analyzing Routes to Dial-In Clients

Summary of EIGRP Network Design

Case Study: Summarization Methods

Case Study: Controlling Query Propagation

Case Study: A Plethora of Topology Table Entries

Case Study: Troubleshooting EIGRP Neighbor Relationships

Case Study: Troubleshooting Stuck-in-Active Routes

Case Study: Redistribution

Case Study: EIGRP/IGRP Redistribution

Case Study: Retransmissions and SIA

Case Study: Multiple EIGRP ASs

Review

III: Scaling beyond the Domain

8. BGP Cores and Network Scalability

BGP in the Core

Scaling beyond the Core

Dividing the Network into Pieces

BGP Network Growing Pains

Case Study: Route Reflectors as Route Servers

Case Study: Troubleshooting BGP Neighbor Relationships

Case Study: Conditional Advertisement

Case Study: Dual-Homed Connections to the Internet

Case Study: Route Dampening

Review

9. Other Large Scale Cores

NHRP

Case Study: NHRP in an ATM Network

MPLS

Review

IV: Appendixes

A. OSPF Fundamentals

How OSPF Works

Router IDs

LSA Types

Reliable Flooding of LSAs

Building Adjacencies

Adjacencies on Multi-Access Networks

OSPF and Nonbroadcast Multi-Access Networks

Areas

External Route Injection

Virtual Links

On-Demand Routing

B. IS-IS Fundamentals

How IS-IS Works

End Systems and Intermediate Systems

CLNS Addressing

Routing in an IS-IS Network

Metrics & External Routes in IS-IS Networks

Building Adjacencies

LSP Flooding and SPF Recalculation Timers

Neighbor Loss and LSP Regeneration

IP Integration into IS-IS

Multiple net Statements

C. EIGRP Fundamentals

DUAL Operation

Establishing Neighbor Relationships in an EIGRP Network

Metrics in an EIGRP Network

Loop Free Routes in EIGRP Networks

Split-Horizon in EIGRP

Clearing the Topology Table and Querying Neighbors in EIGRP Networks

Stuck-in-Active Routes

Bounding Queries in EIGRP Networks

EIGRP Summarization

Changing Metrics in EIGRP for Reliable Transport

Load Balancing in EIGRP Networks

D. BGP Fundamentals

Mechanics of a Path Vector Protocol

Path Decision

Community Strings

Neighbor Relationships

Route Filtering in BGP

iBGP Synchronization

BGP Summarization

E. Answers to the Review Questions

Answers to Chapter 1 Review Questions

Answers to Chapter 2 Review Questions

Answers to Chapter 3 Review Questions

Answers to Chapter 4 Review Questions

Answers to Chapter 5 Review Questions

Answers to Chapter 6 Review Questions

Answers to Chapter 7 Review Questions

Answers to Chapter 8 Review Questions

Answers to Chapter 9 Review Questions

Glossary

G–H

I–J

K–L

O–P

Q–R

U–Z

About the Authors

Our experience in the networking industry comes from both sides of the fence; we

have managed networks, and we've taken calls from panicked engineers when the

network melts. We have worked together on resolving issues in both large and small

networks throughout the world, which range from minor annoyances to major

meltdowns.

We've analyzed what went wrong after the meltdown, and we've helped redesign

some large networks. All of us currently work for Cisco Systems in various capacities.

Alvaro Retana , CCIE #1609, is currently a Development Test Engineer in the Large

Scale Switching and Routing Team, where he works first hand on advanced features

in routing protocols. Formerly, Alvaro was a technical lead for both the Internet

Service Provider Support Team and the Routing Protocols Team at the Technical

Assistance Center in Research Triangle Park, North Carolina. He is an acknowledged

expert in BGP and Internet architecture.

Cisco Press CCIE Professional Development - Advanced IP Network Design.pdf

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