See the latest about a temporary release delay on new titles. Learn more. View Larger Image. Register your product to gain access to bonus material or receive a coupon. As a networking professional, you will find this practical guide an invaluable resource for understanding routing technologies and configuring and troubleshooting Cisco routers, as well as for studying for the CCIE exam.

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See the latest about a temporary release delay on new titles. Learn more. View Larger Image. Register your product to gain access to bonus material or receive a coupon. As a networking professional, you will find this practical guide an invaluable resource for understanding routing technologies and configuring and troubleshooting Cisco routers, as well as for studying for the CCIE exam. Cisco IP Routing presents the most thorough information available on the inner workings of Cisco routers.

Focusing on intra-domain dynamic routing protocols, the book provides an in-depth understanding of IP routing and forwarding technologies, and their implementation within Cisco routers. You will find essential background information on IP addressing, general routing and forwarding processes, and routing table maintenance.

The book discusses packet forwarding and static routing, and details the specific mechanisms inside the dynamic routing protocols, covering both the distance vector and link-state routing protocols. Numerous examples of logs from real Cisco routers illustrate the concepts presented and their practical application. Useful configuration examples are also presented. In addition, many of the chapters include a Frequently Asked Questions section that clarifies common misunderstandings and confusion about IP routing technologies and Cisco routers.

Comprehensive, yet detailed and accessible, Cisco IP Routing provides the inside information you need to be a truly proficient Cisco router networking professional. Routing and Forwarding Processes.

Click below for Sample Chapter related to this title: zininch3. Overview of Cisco Routers. Description of a Cisco Router. The role of the Internet today cannot be overestimated. It has become a part of our culture. Children learn how to use the Internet at school. Millions of people start their day by checking the e-mail messages. Internet connectivity is not considered as something extraordinary anymore. People use the Internet every day, as they have been using cars or TV sets for decades.

More and more devices become connected to the Internet. These are not limited to servers and personal computers anymore. Electronic organizers, cellular phones, TV sets, and many other types of equipment come with the Internet applications. Digital video cameras and phones are connected to the Internet to instantly cast data to remote users around the globe. The value of the Internet is definitely not in its just being a global network, but in the resources available through this network.

Resources are provided and used by the end devices for example, servers and personal computers --the largest part of the Internet. The other part of it is the intermediate network devices or routers. The role of the routers is to provide connectivity between the end devices by properly forwarding the packets of the Internet Protocol IP that end devices send to each other in order to exchange data such as e-mail messages or the contents of the web pages.

In order to deliver IP packets to their destinations successfully, routers communicate the network reachability information to each other using routing protocols. The information provided by the routing protocols allows the routers to calculate the paths to remote networks. All routing protocols are divided into two groups--intra-domain and inter-domain. Intra-domain routing protocols for exampl! Cisco routers are the most widely spread network devices in the Internet today.

They are used to provide connectivity to the end users, aggregate traffic from multiple access devices, and perform routing in the Internet backbone. This book describes very deep details of Cisco routers functionality with the emphasis on packet forwarding and intra-domain dynamic routing protocols.

Quite a few very high quality books on IP, IP routing, IP network design, and configuration of Cisco routers have recently become available. However, it is still hard to find detailed explanation of the processes happening inside the routers. Nevertheless, this knowledge is vital for network professionals to be able to properly configure and efficiently troubleshoot Cisco routers. This book does not teach how to build networks. It also does not teach the basics of the IP protocol or Cisco routers.

Instead, it is written to thoroughly explain a very limited set of questions--IP routing and IP forwarding inside Cisco routers. The goal of this book is to give the reader a very deep understanding of the routing and forwarding technologies in general and in connection with their implementation in Cisco routers.

The contents are intended to make sure the reader feels the details instead of just memorizing them. The book also clarifies a great number of very common misunderstandings about IP routing technologies and Cisco routers in particular.

An important condition that applies to the readers of this book is the presence of at least basic knowledge of IP and Cisco routers. Except for this reservation, the book is addressed to a wide range of readers. This includes IP network architects, engineers and operators that would like to know more details on IP routing technologies and processes inside Cisco routers, network engineers preparing for the Cisco certified internetworking engineer CCIE examination, network support and consulting engineers, and so on.

The book consists of ten chapters. The first three chapters refresh the knowledge of Cisco routers, IP addressing and routing technologies that is required for the rest of the book.

Remain chapters guide the reader through a thorough explanation of the generic routing and forwarding mechanisms inside Cisco routers and intra-domain IP routing protocols. Brief description of each chapter of the book follows. Chapter Introduction. Chapter 1 provides brief overview of Cisco routers including basic information on routers' hardware and software, configuration and monitoring. This chapter clarifies some points important for other chapters and describes the lab network used in the illustrations.

Chapter IP addressing review. This part of the book explains topics that are important for the routing discussion--classful IP addressing and subnetting, classless IP addressing, and variable length subnet masks. Chapter Routing and forwarding processes.

This chapter sets required background for a detailed discussion on specific routing technologies. The reader is familiarized with the fundamental networking concepts and router operation algorithms. The difference between routing and forwarding processes is explained. It is followed by a description of the sources of routing information and more detailed discussions on each source and the principles of default routing. The chapter also explains the basic forwarding algorithm and the differences between classful and classless routing operations.

Chapter Routing table maintenance. Chapter 4 provides a very detailed discussion on how routing information is organized and maintained in Cisco routers.

The chapter starts with a thorough explanation of each source of routing information. The second part of the chapter is dedicated to the routing table maintenance process. This includes processing of connected, static and dynamic routes, as well as the default route selection algorithm. Chapter Packet forwarding. Chapter 5 describes in detail the IP packet forwarding process--the module that actually uses information in the routing table to move packets from one interface to another.

The chapter starts with the forwarding process overview, followed by a systematic explanation of each stage. Packet switching mechanisms available in Cisco IOS, including fast, optimum, distributed, NetFlow switching and Cisco Express Forwarding are described in the following section. The chapter ends with a discussion on the load sharing techniques available in Cisco routers. Chapter Static routes.

This chapter provides a complete description of static routes in Cisco IOS. This includes the details on recursive static routes, static routes via interfaces, backup floating , default and discard static routes. The chapter also includes implementation scenarios that help the reader understand the issues and tradeoffs involved into managing of a network using static routes. Chapter 7 provides information about generic mechanisms used by the dynamic routing protocols.

This includes basic routing protocol configuration, data structures, routes redistribution and event processing. Chapter Distance vector routing protocols. This chapter begins with a discussion on principles of distance-vector routing and, specifically, the Bellman-Ford algorithm.

Each protocol description includes information on protocol packet formats, input message and event processing, outbound message generation, as well as the configuration commands and examples.

Chapter Link-state routing protocols. The first part of the chapter gives a very detailed explanation of the link-state routing concepts, including the Dijkstra algorithm, link-state database synchronization and flooding. Practically every aspect of the protocol is explained very thoroughly in this section.

The chapter is completed with information on OSPF configuration commands and configuration examples. The chapter introduces the concepts of EIGRP by showing how the protocol solves real-life problems in the distance-vector protocols.

As in the previous chapters, full description of EIGRP packets, message and event processing, as well as update generation is included. When this book was being written, the emphasis was made on explaining why certain things work in a specific way, not just how they work. This is why practically every chapter in the book contains a theoretical introduction to the topic.

The core of every chapter is the actual explanation of specific mechanisms inside the router. In most of the cases, discussions on specific topics are given in the context of Cisco's implementation of the algorithms and mechanisms, illustrated with logs from real Cisco routers. The book contains description of many algorithms. All of them are described in human language, and for some of them a pseudocode definition is given for better understanding.

Chapters 4 through 10 also contain sections that answer the most frequently asked questions about a specific technology. The author would like to note that pseudocode used in this book is not a recompilation of the Cisco IOS source code and any similarity between the two is accidental. Get unlimited day access to over 30, books about UX design, leadership, project management, teams, agile development, analytics, core programming, and so much more.


Cisco IP Routing: Packet Forwarding and Intra-Domain Routing Protocols

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Cisco IP Routing: Packet Forwarding and Intra-domain Routing Protocols

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