Problem Solving - Cisco 1841 - 3G Bundle Router Hardware Installation Manual

Troubleshooting Cisco 1800 Series Routers
(Modular)
If you encounter problems with your Cisco 1800 series integrated services router (ISR) (modular), the
information in this chapter can help you isolate problems in the router or eliminate the router as the
source of the problem.
This chapter contains the following sections:
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To troubleshoot interface cards, see
Note
If you cannot locate the source of the problem, contact a Cisco customer service representative for
information on how to proceed. For technical support information, see the
and Submitting a Service Request" section on page
information ready:
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Problem Solving

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 router aid you in determining router performance and operation. The LEDs are
described in the
OL-5876-03
Problem Solving, page 8-1
Reading LEDs, page 8-4
System Messages, page 8-5
Recovering a Lost Password, page 8-6
More Troubleshooting Help, page 8-6
Chassis type and serial number
Maintenance agreement or warranty information
Type of software and version number
Date you received the router
Brief description of the problem
Brief explanation of the steps you have taken to isolate the problem
"Reading LEDs" section on page
C H A P T E R
Overview of Cisco Interface Cards for Cisco Access
1-15. Before you call, have the following
8-4.
Cisco 1800 Series Routers (Modular) Hardware Installation Guide
8
Routers.
"Obtaining Documentation
8-1