Cisco Systems CISCO1841-HSEC/K9-RF manual Troubleshooting Cisco 1800 Series Routers Modular

C H A P T E R 8

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:

•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

Note To troubleshoot interface cards, see Overview of Cisco Interface Cards for Cisco Access Routers.

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 “Obtaining Documentation and Submitting a Service Request” section on page 1-15. 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 router

•Brief description of the problem

•Brief explanation of the steps you have taken to isolate the problem

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 “Reading LEDs” section on page 8-4.

Cisco 1800 Series Routers (Modular) Hardware Installation Guide

OL-5876-03 8-1