Cisco Systems MWR 1900 manual Troubleshooting, Problem Solving, A P P E N D I X A

A P P E N D I X A

Troubleshooting

Your Cisco MWR 1900 router goes through extensive testing 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:

•Problem Solving, page A-1

•Reading the LEDs, page A-3

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 Cisco Information Packet publication that shipped with your router. 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

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 front panel of the router enable you to determine router performance and operation. For a description of these LEDs, see Reading the LEDs, page A-3.

When problem solving, consider the following router subsystems:

•Power and cooling systems—External power source, power cable, router power supply and circuit breaker, and router blower and fan. Also consider inadequate ventilation or air circulation.

•Modules—LEDs on the modules help identify a failure.

•Cables—External cables that connect the router to the network.

Cisco MWR 1900 Mobile Wireless Edge Router Hardware Installation Guide

78-13982-02 A-1