Cisco IOS XR Fundamentals (Networking Technology Series)

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Overview

Cisco IOS XR Fundamentals is a systematic, authoritative guide to configuring routers with Cisco IOS® XR, the next-generation flagship Cisco® Internet operating system.

In this book, a team of Cisco experts brings together quick, authoritative, and example-rich reference information for all the commands most frequently used to configure and troubleshoot Cisco IOS XR-based routers in both service provider and enterprise environments.

The authors...

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Overview

Cisco IOS XR Fundamentals is a systematic, authoritative guide to configuring routers with Cisco IOS® XR, the next-generation flagship Cisco® Internet operating system.

In this book, a team of Cisco experts brings together quick, authoritative, and example-rich reference information for all the commands most frequently used to configure and troubleshoot Cisco IOS XR-based routers in both service provider and enterprise environments.

The authors walk you through the details of the Cisco IOS XR architecture and explain commands in the new Cisco IOS XR CLI wherever required. They present concise explanations of service provider requirements and internetwork theory, backed by proven sample configurations for IOS XR services, MPLS, multicast, system management, system security, routing, and interfaces.

Cisco IOS XR Fundamentals is an indispensable resource for designing, implementing, troubleshooting, administering, or selling networks containing Cisco IOS XR–supported routers. This is the only Cisco IOS XR book that:

  • Clearly explains how Cisco IOS XR meets the emerging requirements of both current and future networks
  • Gives network professionals extensive information for simplifying migration and taking full advantage of Cisco IOS XR’s new power
  • Presents detailed, tested configuration examples that network professionals can apply in their own networks
  • Walks through using new Cisco IOS XR features and the In-Service Software Upgrade (ISSU) process to minimize downtime and cost

Mobeen Tahir, CCIE® No. 12643 (R&S, SP), is a Cisco network consulting engineer with more than a decade of experience in designing and deploying service provider networks. He currently works for the WWSP practice team, which provides consulting services to Cisco NGN customers.

Mark Ghattas, CCIE No. 19706 (Service Provider), is a solution architect at Cisco and has been in the networking industry for more than 15 years. He focuses on IOS XR–based platforms for service providers and currently manages the World Wide Service Provider Practice team in Advanced Services.

Dawit Birhanu, CCIE No. 5602, is a technical leader at Cisco. He assists global service providers in deploying new NGN products and technologies. He specializes in IOS XR–based platforms, QoS, MPLS, and BGP.

Syed Natif Nawaz, CCIE No. 8825 (R&S, SP), has more than 10 years' experience in providing networking design, deployment, and escalation assistance to service provider customers. He is currently the IOS XE software development manager at Cisco, where he works on customer-focused software qualification, certification, and deployment; feature integration; release processes; and other software quality initiatives.

  • Use Cisco IOS XR to deliver superior scalability, availability, security, and service flexibility
  • Understand the Cisco IOS XR distributed, modular architecture
  • Design, implement, and troubleshoot networks containing Cisco IOS XR–supported routers
  • Configure Cisco IOS XR routing, including RIP, IS-IS, OSPF, and EIGRP
  • Learn BGP implementation details specific to Cisco IOS XR and using RPL to influence policies
  • Manage IP addresses and Cisco IOS XR services
  • Secure Cisco IOS XR using standard and extended ACLs, prefix lists, and uRPF
  • Master all facets of MPLS configuration, including LDP, L3VPN, and TE
  • Configure PIM, IGMP, and static RP multicast
  • Optimize networks using advanced Cisco IOS XR features, including secure domain routers
  • Learn building blocks of Multishelf, and understand configurations and migration techniques

This book is part of the Cisco Press® Fundamentals Series. Books in this series introduce networking professionals to new networking technologies, covering network topologies, sample deployment concepts, protocols, and management techniques.

Category: Networking: Routing and Switching

Covers: Cisco IOS XR

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Product Details

  • ISBN-13: 9781587052712
  • Publisher: Cisco Press
  • Publication date: 6/25/2009
  • Series: Networking Technology Series
  • Pages: 504
  • Sales rank: 722,940
  • Product dimensions: 7.20 (w) x 9.10 (h) x 1.20 (d)

Meet the Author

Mobeen Tahir, CCIE No. 12643 (SP, R&S), is a network consulting engineer with the World Wide Service Provider Practice team in Cisco. Mobeen started his career in the communication industry in 1993 with France-based Alcatel. While working for Alcatel between 1993 and 1998, Mobeen engaged in assignments ranging from manufacturing voice switches to planning large-scale telecommunications projects. He joined Cisco in 1999 and has worked on the development testing of the IOS XR operating system for c12000 and CRS-1 platforms. His current role as a network consulting engineer at Cisco consists of designing and deploying NGN networks in the service provider space. Mobeen specializes in IOS XR–based deployments and provides consulting services to Cisco customers. Mobeen has attained master of engineering and B.S.E.E degrees from institutions in Canada and the United States. He lives with his wife and two children in Cary, North Carolina.

Mark Ghattas, CCIE No. 19706 (Service Provider), is a solutions architect focusing on architecture and design. He manages the World Wide Service Provider NGN Core Practice team in Advanced Services. Mark has more than 15 years of experience with data communication technologies. Mark joined Cisco Systems in 1999 and has supported strategic service providers. Mark has supported many of the first CRS-1 customers in Japan and the Asia Pacific theatre, CANSAC, Latin America, and North America. He has presented on various topics at Networkers relating to IOS XR. He holds a bachelor’s degree from the University of Maryland and plans to earn his MBA degree.

Dawit Birhanu, CCIE No. 5602, is a technical leader with the World Wide Service Provider Practice team in Cisco Systems, where he is responsible for assisting global service providers with the deployment of new NGN products and technologies. He specializes in IOS XR–based platforms, QoS, MPLS, and BGP. Dawit joined Cisco Systems in 2000 and has worked on the deployment of new technologies for Cisco 12000 and CRS-1 in the service provider space. Dawit has a master of telecommunications degree from the University of Pittsburgh and a master of electronics engineering degree from Eindhoven University of Technology, The Netherlands. Before getting into the networking industry, Dawit was a lecturer of electrical engineering at Addis Ababa University, Ethiopia, between 1992 and 1995. Dawit lives with his wife and two daughters in Raleigh, North Carolina.

Syed Natif Nawaz,CCIE No. 8825 (SP, R&S), has more than ten years of experience in providing networking design, deployments, and escalation assistance to various service provider customers. Syed Natif Nawaz is currently the IOS XE software development manager at Cisco Systems, where he works on customer-focused software qualification/certification/deployment, feature integration, release processes, and other software quality initiatives. He has presented on various MPLS-related topics in the Networkers conference (Florida), MPLS Power Sessions (London), NANOG (Dallas), and APRICOT (Perth) and has contributed to articles such as “L2VPN: Changing and Consolidating Networks” in Techworldand “Cell Packing” in Packet Magazine. Formerly, Syed Natif Nawaz worked as a development engineer at Assured Access technologies and Alcatel, where he developed software for access concentrators. In addition to higher education in electrical and electronics from the University of Madras, Syed Natif Nawaz also holds an M.S. in computer science and engineering from State University of New York at Buffalo.

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Read an Excerpt

Cisco IOS XR FundamentalsCisco IOS XR FundamentalsIntroduction

This book is intended to provide a reference to users who plan or have implemented Cisco IOS XR software in the network. Cisco IOS XR Fundamentals provides an overview of IOS XR operation system infrastructure and hardware architecture on the Carrier Routing System. The intention of this book is to provide general networking topics in IOS XR that service providers may implement in the core network. It is not feasible to cover every aspect of IOS XR; however, the key configurations have been explained that are typically deployed in core networks.

Who Should Read This Book?

Readers who have a relatively strong working knowledge of Cisco IOS Software and routing protocols will benefit from the discussions and configuration examples presented.

How This Book Is Organized

Although this book could be read cover to cover, it is designed to provide a configuration overview on Cisco IOS XR to support implementation configuration and features in IOS XR. Chapter 1 provides an overview of the evolution of operating systems and an understanding of the underlying QNX operating system. Chapters 2 through 12 are the core chapters and can be covered in order. If you do intend to read them all, the order in the book is an excellent sequence to use.

Chapters 1 through 12 cover the following topics:

  • Chapter 1, “Introducing Cisco IOS XR”: This chapter discusses the evolution of network operating systems in service provider enviroments. It is important to understand the goals and requirement of service providers that influenced the goals of IOS XR.
  • Chapter 2, “Cisco IOS XR Infrastructure”: This chapter discusses the interworkings of IOS XR. It helps you understand IOS XR microkernel architecture, process scheduling, interprocess communications, system database, and distributed services.
  • Chapter 3, “Installing Cisco IOS XR”: This chapter discusses various procedures for installing IOS XR on the Carrier Routing System.
  • Chapter 4, “Configuration Management”: This chapter provides a deeper insight into how IOS XR is different when configuring interfaces, out of band management, and features such as rollback and commit commands. Understanding these features will help you better manage the system.
  • Chapter 5, “Cisco IOS XR Monitoring and Operations”: This chapter explores how monitoring works in IOS XR. As IOS XR operates as a real-time operating system, there are monitoring tools that provide deeper inspection of activities on the system.
  • Chapter 6, “Cisco IOS XR Security”: This chapter examines inherent policers that provide a layer of security within the operating system. The importance of Local Packet Transport System (LPTS) is discussed.
  • Chapter 7, “Routing IGP”: This chapter covers the basics of routing protocol configurations. It provides configuration examples to show how IGP features are configured in IOS XR.
  • Chapter 8, “Implementing BGP in Cisco IOS XR”: This chapter introduces the IOS XR implementation of BGP. This chapter assumes that you have prior experince and knowledge of the BGP protocol and focuses on unique aspects of IOS XR BGP configuration. This chapter also provides details on Routing Policy Language as a vehicle for implementing BGP routing policies.
  • Chapter 9, “Cisco IOS XR MPLS Architecture”: This chapter discusses Multiprotocol Label Switching (MPLS), an important technology for building converged network infrastructure and services. This chapter assumes that you are familiar with MPLS protocols and operations. This chapter discusses IOS XR MPLS architecture, features, implementation, and configuration. It covers LDP, Layer 3 VPN, VPWS, VPLS, and MPLS Traffic Engineering.
  • Chapter 10, “Cisco IOS XR Multicast”: This chapter discusses when to use queuing and which queuing technique to use. This chapter also examines Weighted Fair Queuing (WFQ), Custom Queuing, and Priority Queuing and addresses the need for compression in today’s enterprise network.
  • Chapter 11, “Secure Domain Router”: This chapter covers the concept of SDRs. It discusses the Distributed Route Processor (DRP) hardware needed to implement SDRs and provides configuration examples.
  • Chapter 12, “Understanding CRS-1 Multishelf”: This chapter discusses the Cisco implementation of the CRS-1 multishelf system. The key components are discussed to understand the architecture and troubleshooting of a CRS-1 multishelf system. A fabric troubleshooting section is covered to support implementation and operation.

© Copyright Pearson Education. All rights reserved.

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Table of Contents

Foreword

Introduction

Chapter 1 Introducing Cisco IOS XR

Evolution of Networking

Requirements for Carrier-Grade NOS

Convergence

Scalability

Availability

Hardware Redundancy

Failure Recovery and Microkernel-Based NOS

Process Restartability

Failure Detection

Software Upgrades and Patching

Security

Service Flexibility

Operating System Concepts

Basic Functions of an Operating System

Process Scheduling

Interrupt Handling

Memory Management

Synchronization

Interprocess Communication

Dynamic Link Library

Portable Operating System Interface

High-Level Overview of Cisco IOS XR

Cisco IOS XR Platforms

Cisco CRS-1 Carrier Routing System

Cisco XR 12000 Series

Cisco ASR 9000 Series

Chapter 2 Cisco IOS XR Infrastructure

Cisco IOS XR Kernel

Threads

Scheduling Algorithms

Synchronization Services

Cisco IOS XR System Manager

Process Attributes

System Manager and Process Lifecycle

CLI for Sysmgr and Processes

Interprocess Communication

Characteristics of IPC Mechanisms

Synchronous Versus Asynchronous

Intra-node Versus Inter-node

Connection-Oriented Versus Rendezvous

Point-to-Point Versus Point-to-Multipoint

Light Weight Messaging

Group Service Protocol

Atomic Descriptor Ring

Qnet

Distributed Services

GSP

Bulk Content Downloader

Process Placement

Cisco IOS XR System Database

High Availability Architecture

Forwarding Path

Chapter 3 Installing Cisco IOS XR

Introduction to Cisco IOS XR Packages

Image Naming Conventions

Cisco IOS XR Bootable Files, PIEs, and SMUs

Composite Bootable Files

Composite Upgrade PIE

Optional PIEs

Software Maintenance Upgrade

Install System Overview

Preparing to Install Cisco IOS XR

TURBOBOOT

Setting the TURBOBOOT ROMMON Variable

Booting the .vm File from ROMMON

Verifying the Software Installation

Installing Packages

TURBOBOOT Considerations for the c12000 Platform

Booting the Standby RP

Upgrading to a Major Cisco IOS XR Version Using mini.pie

Install Rollback

Removing Inactive Packages

Performing an Install Audit

Disk Backup and Recovery

Creating a Backup Disk with Golden Disk

Disk Mirroring

Creating a Disk Partition

Turning On Disk Mirroring

Install Health Checks

Verifying MD5 Signature of a PIE or an SMU

Anticipating Disk Space Usage

Testing a PIE or SMU Installation

Verifying the config-register

Clearing Configuration Inconsistency

Chapter 4 Configuration Management

Understanding Distributed Configuration Management

Control Plane Configuration Management

Data Plane Configuration Management

Understanding Configuration Planes

Admin Plane

Shared Plane

Local Plane

Components of Configuration Management

Configuration Manager

Configuration File System

Role of SysDB in Configuration Management

Replicated Data Service File System

Understanding the Two-Stage Commit Model

Building the Target Configuration

Commit Operation

Commit Confirmed Option

Commit Failures

Configuration Failures During Startup

Configuration Features in Cisco IOS XR

Deleting Physical Interface

Configuration Navigation

Default Running Configuration Behavior

Troubleshooting Configuration Inconsistencies

Configuration Session Lock

Avoiding a Commit Operation and Clearing the Target Configurations

Option 1: Unlock the Configuration Session

Option 2: Use the clear Command

Option 3: Use the abort Command

Option 4: Use the end or exit Commands

Configuration Management During Hardware and Software Change Events

Configuration Management During Online Insertion and Removal Events

Case 1: Insert or Remove a Node

Case 2: Replace the Node with a Different Node

Case 3: Replace the Node with a Higher Density Node

Case 4: Replace the Node with a Lower Density Node

Configuration Management During Package Activation and Deactivation

Interface Preconfiguration

Configuration Template

Configuration Management During Router Startup

Configuration Rollback

Chapter 5 Cisco IOS XR Monitoring and Operations

Using SNMP

Configuring SNMP

Cisco IOS XR Syslog

SNMP in the Context of a VRF

Logging Destination

Local Archiving of Logging Messages

Embedded Event Manager

EEM Event Detectors and Events Processing

Timer Services Event Detector

Syslog Event Detector

None Event Detector

Watchdog System Monitor Event Detector

Distributed Event Detectors

Registering and Using Onboard EEM Policies

User-Defined EEM Policy

EEM Reliability Metrics

Monitoring Processes

WDSYSMON

Monitoring Memory

Using the show system verify Command

Operations and Monitoring Best Practices

Chapter 6 Cisco IOS XR Security

Secure Operating System

Securing Access to the Router

Admin Plane

SDR Plane

User Groups and Task Groups

User Group and Task Group Inheritance

External AAA

Configuring a TACACS+ Server

Authentication Using RADIUS

Configuring Secure Shell

Management Plane Protection

Securing the Forwarding Plane

Access Control Lists

Unicast RPF

Local Packet Transport Service

Mechanics Behind LPTS: A High-Level Overview

Configuring LPTS

Chapter 7 Routing IGP

Routing Information Protocol

Understanding RIP Fundamentals

RIP Versions

Configuring RIP in Cisco IOS XR

Configuring Route Policy Language

Configuring Passive Interface

Restarting, Shutting Down, and Blocking RIP

Verifying and Troubleshooting RIP

Enhanced Interior Gateway Routing Protocol

Understanding EIGRP Fundamentals

Neighbor Discovery/Recovery

Reliable Transport Protocol

Diffusing Update Algorithm

Protocol-Dependent Modules

Configuring EIGRP in Cisco IOS XR

Configuring Routing Policy

Configuring Router ID

Configuring and Verifying NSF

Verifying EIGRP Process Status

Verifying and Troubleshooting EIGRP

Open Shortest Path First

Understanding OSPF Fundamentals

Configuring OSPF in Cisco IOS XR

Configuring and Verifying OSPFv2

Hierarchical CLI and Inheritance

Configuring OSPFv2 Authentication

Verifying NSF Configuration and Standby RP Status

Configuring and Verifying Nonstop Routing

Configuring and Verifying Multiarea Adjacencies

Configuring and Verifying Bidirectional Forwarding Detection

Configuring OSPF Timers

Configuring and Verifying OSPFv3

Intermediate System to Intermediate System

Understanding IS-IS Fundamentals

Configuring IS-IS in Cisco IOS XR

Verifying the Single Topology Model

Configuring and Verifying the Multitopology Model

Configuring and Verifying Interface States

Configuring IS-IS NSF and IS-IS Timers

Configuring and Verifying BFD in IS-IS

Configuring and Verifying IP Fast Reroute

Configuring and Verifying Authentication in IOS XR IS-IS

Chapter 8 Implementing BGP in Cisco IOS XR

Cisco IOS XR BGP Architectural Overview

Cisco IOS XR BGP Hierarchical Configuration

Address Family Configuration Mode

Configuration Groups

Implementing BGP Policies

Routing Policy Language

Prefix Set

AS-path Set

Community Set

Routing Policies

Hierarchical Policies and Parameterization

BGP Policy Accounting

BGP Remotely Triggered Black Hole

BGP Graceful Restart

BGP Distributed Speaker

Cisco IOS XR BGP Convergence

Chapter 9 Cisco IOS XR MPLS Architecture

Understanding Cisco IOS XR MPLS Architecture Fundamentals

TTL Processing

Cisco IOS XR MPLS Load Balancing

Label Distribution Protocol

LDP Basic Configuration

LDP Parameters

LDP Label Control

LDP-IGP Sync and LDP Session Protection

MPLS Traffic Engineering

Cisco IOS XR Peer-to-Peer L3VPN

Virtual Routing Forwarding Tables

MP-iBGP Between PE Routers

Routing Between CE and PE

Static Routing for CE-PE

eBGP as CE-PE Protocol

OSPF as CE-PE Protocol

RIP as CE-PE Protocol

L2VPN

Virtual Private Wire Service

VPWS Configuration in IOS XR

Pseudo Wire Redundancy

Virtual Private VLAN Service

Chapter 10 Cisco IOS XR Multicast

Understanding Multicast Routing Fundamentals

Internet Group Management Protocol

IGMPv2

IGMPv3

Protocol Independent Multicast

Understanding Cisco IOS XR Multicast

Understanding Cisco IOS XR PIM Sparse Mode

Understanding PIM Source Specific Multicast on IOS XR

Configuring Cisco IOS XR Multicast

Enabling Multicast Routing

Configuring IGMP

Configuring PIM

Configuring Static RP

Auto-RP

BSR

PIM SSM Configuration

Monitoring and Troubleshooting Cisco IOS XR Multicast

Debugging Multicast on the CRS Router’s Ingress Path

Debugging Multicast in Router’s Fabric and Egress Path

Debugging an RPF Failure Using a Line Card MFIB Command

Chapter 11 Secure Domain Router

Owner and Non-Owner SDR

Understanding SDR Privileges

Creating a Secure Domain Router

DRP

Configuring a Secure Domain Router

Creating a Named Secure Domain Router

Assigning Resources to a Named SDR

Logging In to a Newly Named SDR

Process Placement

Chapter 12 Understanding CRS-1 Multishelf

Multishelf Overview

Line Card Chassis

Fabric Card Chassis

Switch Fabric Cards

Fabric Data Path

High Availability

Multishelf Fabric Interconnect

Fabric Planes

SEA Links

Fabric Backpressure

Optical Array Cables

Recommended Practices and Considerations

Single Module Fabric Configuration

Multimodule Configuration

Multishelf Control Ethernet

Multishelf Configuration

Viewing the Configuration

Line Card Chassis to Multishelf Preparation

Troubleshooting Multishelf Fabric Planes

Troubleshooting Fabric Links

Appendix A ROMMON and Configuration Register Settings

Appendix B Multishelf 2+1 Array Cable Mapping

Appendix C Switch Fabric Down Flags

9781587052712 TOC 5/19/2009

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Preface

Cisco IOS XR FundamentalsCisco IOS XR FundamentalsIntroduction

This book is intended to provide a reference to users who plan or have implemented Cisco IOS XR software in the network. Cisco IOS XR Fundamentals provides an overview of IOS XR operation system infrastructure and hardware architecture on the Carrier Routing System. The intention of this book is to provide general networking topics in IOS XR that service providers may implement in the core network. It is not feasible to cover every aspect of IOS XR; however, the key configurations have been explained that are typically deployed in core networks.

Who Should Read This Book?

Readers who have a relatively strong working knowledge of Cisco IOS Software and routing protocols will benefit from the discussions and configuration examples presented.

How This Book Is Organized

Although this book could be read cover to cover, it is designed to provide a configuration overview on Cisco IOS XR to support implementation configuration and features in IOS XR. Chapter 1 provides an overview of the evolution of operating systems and an understanding of the underlying QNX operating system. Chapters 2 through 12 are the core chapters and can be covered in order. If you do intend to read them all, the order in the book is an excellent sequence to use.

Chapters 1 through 12 cover the following topics:


  • Chapter 1, “Introducing Cisco IOS XR”: This chapter discusses the evolution of network operating systems in service provider enviroments. It is important to understand the goals and requirement of service providers that influenced the goals of IOSXR.
  • Chapter 2, “Cisco IOS XR Infrastructure”: This chapter discusses the interworkings of IOS XR. It helps you understand IOS XR microkernel architecture, process scheduling, interprocess communications, system database, and distributed services.
  • Chapter 3, “Installing Cisco IOS XR”: This chapter discusses various procedures for installing IOS XR on the Carrier Routing System.
  • Chapter 4, “Configuration Management”: This chapter provides a deeper insight into how IOS XR is different when configuring interfaces, out of band management, and features such as rollback and commit commands. Understanding these features will help you better manage the system.
  • Chapter 5, “Cisco IOS XR Monitoring and Operations”: This chapter explores how monitoring works in IOS XR. As IOS XR operates as a real-time operating system, there are monitoring tools that provide deeper inspection of activities on the system.
  • Chapter 6, “Cisco IOS XR Security”: This chapter examines inherent policers that provide a layer of security within the operating system. The importance of Local Packet Transport System (LPTS) is discussed.
  • Chapter 7, “Routing IGP”: This chapter covers the basics of routing protocol configurations. It provides configuration examples to show how IGP features are configured in IOS XR.
  • Chapter 8, “Implementing BGP in Cisco IOS XR”: This chapter introduces the IOS XR implementation of BGP. This chapter assumes that you have prior experince and knowledge of the BGP protocol and focuses on unique aspects of IOS XR BGP configuration. This chapter also provides details on Routing Policy Language as a vehicle for implementing BGP routing policies.
  • Chapter 9, “Cisco IOS XR MPLS Architecture”: This chapter discusses Multiprotocol Label Switching (MPLS), an important technology for building converged network infrastructure and services. This chapter assumes that you are familiar with MPLS protocols and operations. This chapter discusses IOS XR MPLS architecture, features, implementation, and configuration. It covers LDP, Layer 3 VPN, VPWS, VPLS, and MPLS Traffic Engineering.
  • Chapter 10, “Cisco IOS XR Multicast”: This chapter discusses when to use queuing and which queuing technique to use. This chapter also examines Weighted Fair Queuing (WFQ), Custom Queuing, and Priority Queuing and addresses the need for compression in today’s enterprise network.
  • Chapter 11, “Secure Domain Router”: This chapter covers the concept of SDRs. It discusses the Distributed Route Processor (DRP) hardware needed to implement SDRs and provides configuration examples.
  • Chapter 12, “Understanding CRS-1 Multishelf”: This chapter discusses the Cisco implementation of the CRS-1 multishelf system. The key components are discussed to understand the architecture and troubleshooting of a CRS-1 multishelf system. A fabric troubleshooting section is covered to support implementation and operation.

© Copyright Pearson Education. All rights reserved.

Read More Show Less

Customer Reviews

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  • Anonymous

    Posted March 24, 2011

    MUST READ & HAVE IF YOU WORK WITH CISCO SOLUTIONS

    I was in the need to learn and had a reference book around IOS XR because my daily job activities. Cisco IOS XR FUNDAMENTALS is the right reference guide to learn the foundations for this Cisco Line of product.

    It is a book that builds knowledge with the content you will see that the 12 chapter it contains explain from the fundamentals of the software, the fundamentals of the implementation of the IGP protocols, BGP, MPLS, Multicast and SDR.

    I cannot stop reiterating that this book is a mandatory field guide for any engineer that works with Cisco IOS XR and a must read to be introduce for the engineer that wants to learn and is starting his career on this line of product.

    The author build a book that has a lot of show commands that are very useful to understand all the examples of deployments it shows.

    I was expecting a simple topology where all the examples can be build from and follow-up on all the examples, but the topologies and example are very close to a real world implementation.

    In general nobody puts their attention on the appendix of a book, sometime you use them sometime no, but I will recommend taking a look at it in order to know the information that is in there, it will probably help you in the future.

    One chapter that is very useful to really understand what is the purpose of the book and why its content is the chapter 1 and 2, where you will learn the blueprints for the Cisco IOS XR. In addition chapter 12 helps you understand the architecture of the CR-1 and a lot of fundamentals of the main platform where the Cisco IOS XR was developed.

    Cisco IOS XR Fundamentals really points the blueprints around the infrastructure mainly around the network and some parts of the end point, like the servers. When it covers this part it is really sad that the only type of server technology the author points out is the IBM Data Center, probably the justification is that it only talks about the Protocol but I would like to see some other vendors or general endpoints mention like blades, rack mount servers, tower or micro tower servers.

    I will recommend the book as a daily personal reference because you can find out concept that will help you on your daily work when you're are designing or deploying infrastructures with Cisco IOS XR in an enterprise or a service provider.

    I will suggest the author that for the second edition will need to cover the architecture of all the platforms where Cisco IOS XR is used.

    This is a must learn platform because probably all the software around Cisco products will converge in a combination between IOS, NEXUS-OS and IOS-XR.

    My rating of the book is a 4, good book for reference.

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  • Anonymous

    Posted December 15, 2009

    No text was provided for this review.

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