CCNA Routing and Switching Portable Command Guide (3rd Edition)

Book Preface

Introduction

Welcome to CCNA Routing and Switching! This book is the result of a massive redesign by Cisco of their entry-level certification exams to more closely align with indus-try’s need for networking talent as we enter into the era of “the Internet of Everything.” The success of the previous two editions of this book prompted Cisco Press to approach me with a request to update the book with the necessary new content to help both students and IT professionals in the field study and prepare for the new CCNA Routing and Switching exam. For someone who originally thought that this book would be less than 100 pages in length and limited to the Cisco Networking Academy program for its complete audience, I am continually amazed that my little engineering journal has caught on with such a wide range of people throughout the IT community.

I have long been a fan of what I call the “engineering journal,” a small notebook that can be carried around and that contains little nuggets of information—commands that you forget, the IP addressing scheme of some remote part of the network, little reminders about how to do something you only have to do once or twice a year (but is vital to the integrity and maintenance of your network). This journal has been a constant companion by my side for the past 15 years; I only teach some of these concepts every second or third year, so I constantly need to refresh commands and concepts and learn new commands and ideas as they are released by Cisco. My journals are the best way for me to review because they are written in my own words (words that I can understand). At least, I had better understand them, because if I can’t, I have only myself to blame.

My first published engineering journal was the CCNA Quick Command Guide; it was organized to match to the (then) order of the Cisco Networking Academy program. That book then morphed into the Portable Command Guide, the third edition of which you are reading right now. This book is my “industry” edition of the engineering journal. It contains a different logical flow to the topics, one more suited to someone working in the field. Like topics are grouped together: routing protocols, switches, troubleshooting. More-complex examples are given. New topics have been added, such as OSPFv3 and EIGRPv6 for IPv6, multi-area OSPF, PPPoE, GRE tunnels, and Cisco IOS Version 15. The popular “Create Your Own Journal” appendix is still here (blank pages for you to add in your own commands that you need in your specific job). We all recognize the fact that no network administrator’s job can be so easily pigeonholed as to just working with CCNA topics; you all have your own specific jobs and duties assigned to you. That is why you will find those blank pages at the end of the book. Make this book your own; personalize it with what you need to make it more effective. That way your journal will not look like mine.

â–ª C2821 ISR with PVDM2, CMME, a WIC-2T, FXS and FXO VICs, running 12.4(10a) IPBase IOS

â–ª WS-C2960-24TT-L Catalyst switch, running 12.2(25)SE IOS

â–ª WS-C2950-12 Catalyst switch, running Version C2950-C3.0(5.3)WC(1) Enterprise Edition software

â–ª C1941 ISRG2 router with WIC 2T and HWIC-4ESW, running Version 15.1(1)T Cisco IOS with a technology package of IPBaseK9

Those of you familiar with Cisco devices will recognize that a majority of these commands work across the entire range of the Cisco product line. These commands are not limited to the platforms and Cisco IOS Software versions listed. In fact, these devices are in most cases adequate for someone to continue his or her studies into the CCNP level, too.