Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Preface
This preface describes the purpose, audience, organization, and conventions for the
ATM and Layer 3 Switch Router Troubleshooting Guide and provides information on how
to obtain related documentation.
Purpose
Failures in internetworks are characterized by certain symptoms. These symptoms might be general
(clients that are unable to access specific servers) or more specific (routes that are not in the routing
table). Each symptom can be traced to one or more problems or causes by using specific troubleshooting
tools and techniques. Once you know what the problem is, you can take steps to fix it.
The goal of this guide is to help you isolate and resolve the most common connectivity and performance
problems with your Cisco switch router. This guide describes how to define symptoms, identify
problems, and implement solutions in Cisco switch router environments. This guide does not describe
troubleshooting router connections and configurations. For router troubleshooting refer to the Internetwork
Troubleshooting Guide.
This preface describes who should read the ATM and Layer 3 Switch Router Troubleshooting Guide,
how it is organized, and its document conventions.
Audience
This publication is a stand-alone document for experienced network administrators responsible for
configuring and maintaining the ATM and Layer 3 switch router.
Administrators should have hands-on experience in configuring, administering, and troubleshooting a
network, should know how to configure routers, switches, and other internetwork devices, and should be
familiar with the protocols and media that their hardware supports. Awareness of the basic topology of
their network is also essential.