Troubleshooting Guide in the combined networks

This manual is intended for use as a tool for troubleshooting, as well as to prevent violations in the networks of all kinds. The above information it allows you to make informed, timely decisions to improve irentabelnye network environment. Furthermore, in this book presents problems frequently encountered in a particular network technology; lists the symptoms, a description of the network environment, these methods for diagnosing and finding the causes of malfunctions, and provides troubleshooting tips. The number of pending protocols includes TCP / IP, IPX, IBM, AppleTalk, a protocol transparent bridge forwarding, DECnet and ISO CLNS. In this second edition are given the latest recommendations for the detection and elimination of violations of the software Cisco Works 2000 cabling, canals DSL, WAN switching means and means of protection. This book, written with the participation of experts of the center support of Cisco Systems, provides proven guidelines for troubleshooting, the use of which helps to reduce downtime, improve performance and reliability of the network. Cisco Systems, Inc. is a leader in the field of network tools for the Internet, publishes Cisco Press publishing technical literature, is universally acknowledged as an authoritative source of knowledge, trains specialists and provides a quick and timely exchange of information that helps to reduce costs, improve efficiency of the network and establish closer business relationships with customers. This guide is created as a result of the joint efforts of the specialists of Technical Support for Cisco and other organizations. The current edition includes the latest and accurate advice on troubleshooting in the network, which repeatedly tested in practice, employees of the center. Visit Web-site technical support of Cisco at www.cisco.com/tac, to familiarize yourself with all the features provided by it round the clock support. This book is part of a series of Cisco Press Core Series, which is aimed at professionals working with networks and provides valuable information about creating optimal networks, new technologies and on how to make a career in this field