Table of Contents

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.

Organization

The major sections of this guide are as follows:

Related Documentation

Use the following books as supplements to this guide:

• Internetwork Troubleshooting Guide
  
  
• Debug Command Reference
  
  
• Guide to ATM Technology
  
  
• ATM Switch Router Software Configuration Guide
  
  
• ATM Switch Router Command Reference
  
  
• Layer 3 Switching Software Feature and Configuration Guide
  
  
• Catalyst 8540 CSR Route Processor and Interface Module Installation Guide
  
  
• Site Preparation and Safety Guide
  
  
• Catalyst 8540 Chassis Installation Guide
  
  
• Hardware Installation Guide (Catalyst 8510 MSR and LightStream 1010)
  
  
• Processor Installation Guide (Catalyst 8510 MSR and LightStream 1010)
  
  
• ATM Port Adapter and Interface Module Installation Guide
  
  
• Configuration Fundamentals Command Reference
  
  

Conventions

This document uses the following conventions:

Notes use the following convention:

Note   Means reader take note. Notes contain helpful suggestions or references to material not covered in the publication.

Cautions use the following convention:

Caution   Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.

Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following sites:

• http://www.cisco.com
  
  
• http://www-china.cisco.com
  
  
• http://www-europe.cisco.com
  
  

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

• Registered Cisco Direct Customers can order Cisco Product documentation from the Networking Products MarketPlace:
  
  

http://www.cisco.com/public/ordsum.html

• Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:
  
  

http://www.cisco.com/go/subscription

• Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, in North America, by calling 800 553-NETS(6387).
  
  

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:

Attn Document Resource Connection
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.

To access Cisco.com, refer to the following website:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

http://www.cisco.com/tac

P3 and P4 level problems are defined as follows:

• P3—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
  
  
• P4—You need information or assistance on Cisco product capabilities, product installation, or basic product configuration.
  
  

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, refer to the following website:

http://www.cisco.com/register/

If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:

http://www.cisco.com/tac/caseopen

Contacting TAC by Telephone

If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, refer to the following website:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

P1 and P2 level problems are defined as follows:

• P1—Your production network is down, causing a critical impact to business operations if service is not restored quickly. No workaround is available.
  
  
• P2—Your production network is severely degraded, affecting significant aspects of your business operations. No workaround is available.