Appendix; Troubleshooting; Isolating Problems - Cisco Router 3600 Hardware Installation Manual

Troubleshooting

Your Cisco 3600 series router goes through extensive testing and burn-in before leaving the factory. If
you encounter problems, use the information in this appendix to help isolate problems or to eliminate
the router as the source of the problem.
This appendix contains the following sections:
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Note To troubleshoot a network module refer to the
troubleshoot a WAN interface card, refer to the
If you cannot locate the source of the problem, contact a customer service representative for information
on how to proceed. For technical support information, refer to the
section on page
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Isolating Problems

The key to problem solving is to isolate the problem to a specific subsystem by comparing what the
router is doing to what it should be doing.
The LEDs on the front and rear panel of the router enable you to determine router performance and
operation. For a description of these LEDs, see the
and the
OL-2056-05
Isolating Problems, page A-1
Reading Front-Panel LEDs, page A-4
Reading Rear-Panel LEDs, page A-8
Error Messages, page A-10
Recovering a Lost Password, page A-16
xviii. Before you call, 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 new chassis
Brief description of the problem
Brief explanation of the steps you have taken to isolate the problem
"Reading Rear-Panel LEDs" section on page
A P P E N D I X
Cisco Network Modules Hardware Installation
Cisco Interface Cards Hardware Installation
"Obtaining Technical Assistance"
"Reading Front-Panel LEDs" section on page A-4
A-8.
Cisco 3600 Series Routers Hardware Installation Guide
A
Guide; to
Guide.
A-1