Cisco Systems OL-6426-02 manual Troubleshooting, Getting Started, 14-1

BETA DRAFT - CISCO CONFIDENTIAL

C H A P T E R 14

Troubleshooting

Use the information in this chapter to help isolate problems you might encounter or to rule out the router as the source of a problem. This chapter contains the following sections:

•Getting Started

•Before Contacting Cisco or Your Reseller

•ADSL Troubleshooting

•SHDSL Troubleshooting

•PortFast Troubleshooting

•ATM Troubleshooting Commands

•Software Upgrade Methods

•Recovering a Lost Password

•Managing Your Router with SDM

Getting Started

Before troubleshooting a software problem, you must connect a terminal or PC to the router using the light-blue console port. (For information on making this connection, see the documentation listed in the “Related Documents” section on page 4.) With a connected terminal or PC, you can view status messages from the router and enter commands to troubleshoot a problem.

You can also remotely access the interface (Ethernet, ADSL, or telephone) by using Telnet. The Telnet option assumes that the interface is up and running.

Before Contacting Cisco or Your Reseller

If you cannot locate the source of a problem, contact your local reseller for advice. Before you call, you should have the following information ready:

•Chassis type and serial number

•Maintenance agreement or warranty information

•Type of software and version number

•Date you received the hardware

•Brief description of the problem

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

OL-6426-02 14-1