larger cover

Add To My Wish List

Register your product to gain access to bonus material or receive a coupon.

Building Resilient IP Networks


  • Sorry, this book is no longer in print.
Not for Sale

eBook (Watermarked)

  • Your Price: $42.39
  • List Price: $52.99
  • Includes EPUB and PDF
  • About eBook Formats
  • This eBook includes the following formats, accessible from your Account page after purchase:

    ePub EPUB The open industry format known for its reflowable content and usability on supported mobile devices.

    Adobe Reader PDF The popular standard, used most often with the free Acrobat® Reader® software.

    This eBook requires no passwords or activation to read. We customize your eBook by discreetly watermarking it with your name, making it uniquely yours.

  • About
  • Description
  • Sample Content
  • Updates


  • An all-in-one introduction to the various new features and developments in building a resilient IP network
  • A singular source on what Cisco hardware, software products can offer toward resiliency
  • Learn how a resilient IP network helps deliver mission-critical information, like video, voice services
  • Configuration examples offer easy-to-follow implementation guides

  • Copyright 2006
  • Edition: 1st
  • Book
  • ISBN-10: 1-58705-215-6
  • ISBN-13: 978-1-58705-215-6

The practical guide to building resilient and highly available IP networks 

  • Learn from an all-in-one introduction to new features and developments in building a resilient IP network
  • Enable your organization to meet internal service-level agreements (SLAs) for mission-critical resources
  • Understand how a resilient IP network can help in delivering mission-critical information such as video and voice services
  • Work with configuration examples that are based on real-world issues and customer requirements
  • Get tips and best practices from field personnel who have worked on some of the largest networks with stringent uptime requirements and SLAs

More companies are building networks with the intention of using them to conduct business. Because the network has become such a strategic business tool, its availability is of utmost importance to companies and their service providers. The challenges for the professionals responsible for these networks include ensuring that the network remains up all the time, keeping abreast of the latest technologies that help maintain uptime, and reacting to ever-increasing denial-of-service (DoS) attacks.

Building Resilient IP Networks helps you meet those challenges. This practical guide to building highly available IP networks captures the essence of technologies that contribute to the uptime of networks. You gain a clear understanding of how to achieve network availability through the use of tools, design strategy, and Cisco IOS® Software.

With Building Resilient IP Networks, you examine misconceptions about five-nines availability and learn to focus your attention on the real issues: appreciating the limitations of the protocols, understanding what has been done to improve them, and keeping abreast of those changes. Building Resilient IP Networks highlights the importance of having a modular approach to building an IP network and, most important, illustrates how a modular design contributes to a resilient network. You learn how an IP network can be broken down to various modules and how these modules interconnect with one another. Then you explore new network resiliency features that have been developed recently, categorized with respect to the design modules.

Building Resilient IP Networks is relevant to both enterprise and service provider customers of all sizes. Regardless of whether the network connects to the Internet, fortifying IP networks for maximum uptime and prevention of attacks is mandatory for anyone’s business.

This book is part of the Networking Technology Series from Cisco Press®, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Online Sample Chapter

Building Resilient IP Networks: The Access Module

Downloadable Sample Chapter

Download - 329 KB -- Chapter 6: Access Module

Sample Pages

Download the sample pages (includes Chapter 3 and Index)

Table of Contents


Chapter 1       Rise of the IP Transport System

The Internet Explosion

Next-Generation IP Applications

Voice over IP

IP Storage

MPLS: New Kid on the Block

Next-Generation IP Transport System

Continuous Improvements of Protocols

Chapter 2       Establishing a High-Availability Network

Understanding the Five-Nines Availability Debate

Differentiating Between Reliability and Availability

The Five-Nines Approach

Idiosyncrasies of the Telcordia GR-512-Core Document

The Truth About 50-ms Resiliency

A Practical Approach to Achieving High Availability

Measuring Availability

Defining a Metric

Understanding the Issue of Network Availability

Setting a Strategy to Achieve High Availability

Designing a Network for High Availability

Establishing Continuous Fault Detection and Measurement of Network Availability

Making Full Use of Scheduled Downtime

Instituting a Disciplined Approach to Network Operation and Processes


Chapter 3       Fundamentals of IP Resilient Networks

Revisiting IP, TCP, and UDP

Internet Protocol

Transmission Control Protocol

TCP Three-Way Handshake

TCP Sliding Window

User Datagram Protocol

Device-Level Resiliency

Online Insertion and Removal (OIR)

Single Line Card Reload

High System Availability

Route Processor Redundancy

Route Processor Redundancy Plus

Stateful Switchover

Nonstop Forwarding

Impact of Different Switching Paths

Process Switching

Cisco Express Forwarding Switching

Central CEF

Distributed CEF

Protecting the Control Plane and Data Plane

Establishing a Resiliency Strategy

Redundancy Strategy

Logical Resiliency

Physical Resiliency

Scaling Strategy

Key Principles for Designing Resilient Networks





Chapter 4       Quality of Service

Protecting the Control Plane with QoS

Traffic Types That Affect the Control Plane

Tagging Routing Protocol and Layer 2 Control Packets

IP Precedence

The pak_priority Flag

Selective Packet Discard

Receive ACL

Control-Plane Policing

Protecting Applications with QoS

Understanding the Need for Application QoS




Determining When to Deploy QoS

Scenario 1: Undercongested Link

Scenario 2: Occasionally Congested Link

Scenario 3: Badly Congested Link

Building Blocks of QoS

Classification and Marking

Congestion Avoidance

Congestion Management

Traffic Conditioning

Application QoS and Control-Plane Traffic

QoS Deployment Strategy

Classifying Applications

Defining Policies

Testing Policies

Implementing QoS Features



Chapter 5       Core Module

Network Convergence in the Core

OSPF Enhancements

Shortest Path First (SPF) Throttling

OSPF LSA Throttling

OSPF LSA Flooding Reduction

OSPF Fast Hello

OSPF Update Packet-Pacing Timer

OSPF Incremental SPF

OSPF Graceful Restart

RFC 3623

Cisco Implementation

IS-IS Enhancements

IS-IS SPF Throttling

IS-IS LSP Generation

IS-IS LSA Flooding Reduction

IS-IS Fast Hellos

IS-IS Update Packet-Pacing Timer

IS-IS Incremental SPF

IS-IS Graceful Restart

Cisco Implementation

IETF Implementation

EIGRP Enhancements

EIGRP Graceful Shutdown

EIGRP Graceful Restart

EIGRP Stub Router Functionality

Bidirectional Forwarding Detection (BFD)

IP Event Dampening

Multipath Routing

Load Balancing

Equal-Cost Multipath (ECMP)

Per Packet

Per Destination

MPLS Traffic Engineering

Fast Reroute Link Protection

Fast Reroute Node Protection

Multicast Subsecond Convergence


Chapter 6       Access Module

Multilayer Campus Design

Access Layer

Distribution Layer

Core Layer

Access Module Building Blocks

Layer 2 Domain

The Spanning Tree Protocol: IEEE 802.1d




Unidirectional Link Detection (UDLD)




VLANs and Trunking

Common Spanning Tree (CST)

Per-VLAN Spanning Tree (PVST)

Per-VLAN Spanning Tree Plus (PVST+)

IEEE 802.1w

IEEE 802.1s

Channeling Technology

Layer 2 Best Practices

Simple Is Better

Limit the Span of VLANs

Build Triangles, Not Squares

Protect the Network from Users

Selecting Root Bridges

Use Value-Added Features

EtherChannel Deployment

EtherChannel Load Balancing

Consistent EtherChannel Port Settings

Layer 2 Setting for EtherChannel

Turning Off Autonegotiation

Layer 3 Domain

Hot Standby Routing Protocol (HSRP)

Virtual Router Redundancy Protocol (VRRP)

Global Load Balancing Protocol (GLBP)

Layer 3 Best Practices

Adopt Topology-Based Switching

Using Equal-Cost Multipath

Conserve Peering Resources

Adopt a Hierarchical Addressing Scheme


Chapter 7       Internet Module

Understanding Addressing and Routing in the Internet Module

Address-Assignment Scheme


Routing for Internal Users

Routing for External Users

Establishing Internet Module Redundancy

Link-Level Redundancy

Device-Level Redundancy

ISP-Level Redundancy

Site-Level Redundancy

Implementing Security Measures

Security Policy

Filtering at the Internet Module

Resilient Border Gateway Protocol (BGP) Design

BGP Soft Reconfiguration

BGP Convergence Optimization

BGP Next-Hop Address Tracking

BGP Support for Fast Peering Session Deactivation

BGP Route Dampening

Nonstop Forwarding with Stateful Switchover (NSF/SSO) for BGP

Using Network Address Translation (NAT)

Enhanced NAT Resiliency

NAT with Route Map

Static Mapping with Hot Standby Routing Protocol (HSRP) Support

Stateful NAT

Limiting NAT Entries

Multihoming with NAT

Effects of NAT on Network and Applications

Implications on TCP and ICMP Traffic

Application-Specific Gateways

Effects on Voice over IP (VoIP) Traffic

Effects on Router Performance

 Effects on Network Security


Chapter 8       WAN Module

Leased Line

Domestic Leased Circuit Versus International Private Leased Circuit

Leased Circuit Encapsulation

Equal-Cost Load Balancing

Multilink Point-to-Point Protocol (MPPP)




SONET/SDH Protection Switching

Resilient Packet Ring

DPT Architecture

DPT/SRP Classes of Service

SRP Queuing

SRP Fairness Algorithm

RPR Standards

Differences Between 802.17 and DPT/SRP

Dial Backup

Virtual Private Network (VPN)

IP Tunnel


L2TPv3 Deployment



Chapter 9       Data Center Module

Data Center Environmental Considerations





Rack Space

Server Size


Next-Generation Server Architecture

Data Center Network Considerations


Server Performance

Fault-Tolerant Server Features

Multifaceted Server

Data Center Network Architecture

Access Layer Design

NIC Teaming


Aggregation Layer Design

 Trunk Ports on an Aggregation Switch

 Routed Ports on an Aggregation Switch

Architecture Scaling Consideration

Data Center Network Security

Layer 2 Security

Private VLANs (PVLANs)

VLAN Access Control List (VACL)

Port Security

Dynamic ARP Inspection

Layer 3 Security

Switch Forwarding Architecture

Control Plane Policing

DHCP Server Protection

Service Optimization

Server Load Balancing

Global Site Selector

Understanding DNS Resolution

Using GSS

Web Cache Communication Protocol (WCCP)

Integrated Service Modules


Chapter 10     Beyond Implemention: Network Managment

Components of Network Management

Fault Management

Configuration Management

Configuration File Management

Inventory Management

Software Management

Accounting Management

 Performance Management

Security Management


User IDs and Passwords


Establishing a Baseline

Step 1: Take a Snapshot of Inventory

Step 2: Collect Relevant Data

MIB Entries and Object Identifiers

Multi-Router Traffic Grapher

Step 3: Analyze Data

Step 4: Prioritize Problem Areas

Step 5: Determine a Course of Action

Managing Cisco IOS Deployment

Overview of IOS Releases

Understanding IOS Naming Convention

IOS Software Life Cycle Management






Moving Toward Proactive Management

IP Service Level Agreement

ICMP-Based IP SLA Operation

Responder-Based IP SLA Operation

Nonresponder-Based IP SLA Operation

Examples of IP SLA Operations

Component Outage Online (COOL) Measurement

Embedded Event Manager (EEM)

Next-Generation IOS Architecture


End Notes

Appendix A   Calculating Network Availability

Appendix BRFCs Relevant to Building a Resilient IP Network

Appendix CThe Cisco Powered Network Checklist




Download - 103 KB -- Index

Cisco Press Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from Cisco Press and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Cisco Press products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites; develop new products and services; conduct educational research; and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by Cisco Press. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive:

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020