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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:
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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
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:
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OL-5332-01
Getting Started
Before Contacting Cisco or Your Reseller
ADSL Troubleshooting
SHDSL Troubleshooting
ATM Troubleshooting Commands
Software Upgrade Methods
Recovering a Lost Password
Managing Your Router with SDM
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
Brief description of the steps you have taken to isolate the problem
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
C H A P T E R
14.) With a connected terminal or PC, you can view status
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Table of Contents
Troubleshooting
