CHAPTER
6-1
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
6
Troubleshooting
If you encounter problems with your Cisco 1800 series fixed-configuration router, use the information
in this chapter to isolate problems in the router or to eliminate the router as the source of the problem.
This document includes the following sections:
• Solving Problems, page 6-1
• Reading System LEDs, page 6-4
• Reading Port and Connection LEDs, page 6-4
• System Messages, page 6-6
• Recovering a Lost Password, page 6-7
• More Troubleshooting Help—Cisco Technical Assistance Center, page 6-7
If you cannot locate the source of the problem, contact a customer service representative for information
on how to proceed. For technical support information, see the
“Obtaining Documentation and
Submitting a Service Request” section of the Preface. Before you call the Cisco Technical Assistance
Center (TAC), 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
Solving Problems
The key to solving problems is to isolate each problem to a specific subsystem by comparing what the
router is doing to what it should be doing.
Observing the LED indicators on the front and back panels of the router can help you determine router
performance and operation. See the following sections:
• Reading System LEDs, page 6-4
• Reading Port and Connection LEDs, page 6-4
When solving problems, consider the following router subsystems:
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