CHAPTER
14-1
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
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
• 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 14.) 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
• Brief description of the steps you have taken to isolate the problem
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