Troubleshooting; Solving Problems - Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual

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:
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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
Submitting a Service Request"
Center (TAC), have the following information ready:
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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:
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When solving problems, consider the following router subsystems:
OL-6425-03
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
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 System LEDs, page 6-4
Reading Port and Connection LEDs, page 6-4
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
C H A P T E R
section of the Preface. Before you call the Cisco Technical Assistance
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"Obtaining Documentation and
6-1