While there are numerous sources of information and documentation detailing every feature you can implement in a Cisco network and the commands needed to enable those features, the breadth and depth of this data makes it difficult to find the exact information you want, to call up the information quickly, or to carry it with you in the field. Cisco Field Manual: Router Configuration is designed to be a quick, portable solution for networking professionals, providing an easily accessible reference to the most commonly used features that can be configured on Cisco routers. Derived from the authors' notes about how to configure a variety of Cisco router features during the course of their preparation for the CCIE(r) exam, Cisco Field Manual: Router Configuration is an indispensable tool that helps you perform the most popular support tasks. From the first page, the authors zero in on quick facts, configuration steps, and explanations of configuration options in each Cisco IOS(r) Software feature. Divided into six major parts, the book presents concise implementation advice for families of Cisco IOS Software features, including configuration fundamentals, Layer 2 networking, network protocols, packet processing, voice and telephony, and security. Additional appendixes provide you with critical details on Cisco IOS Software filenames, password recovery, configuration registers, well-known network numbers, SNMP MIB structure, and a cabling guide. The quick reference format allows you to easily locate just the information you need without searching through thousands of pages of documentation. Each feature presents a bulleted list of quick facts to review how the feature, technology, or protocol works. This list is followed by step-by-step configuration details that walk you through the required and optional commands and examples that illustrate how to implement the commands and options. Whether you are looking for a handy, portable reference to more easily configure Cisco routers in the field or you are preparing for CCNA(r), CCNP(r), or CCIE, you will find Cisco Field Manual: Router Configuration an essential resource that will save you hours of research time. This book is part of the Cisco Press Networking Technologies Series, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.