Cisco ASR 901S Series Troubleshooting

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Troubleshooting

If you encounter problems while the router is in operation, use the information in this appendix to help isolate

problems or to eliminate the router as the source of the problem.

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 took to isolate the problem

Note

Ensure you provide the customer service representative with any upgrade or maintenance information that

was performed on the router after your initial installation.

This appendix contains the following sections.

•

Problem Solving

To solve a problem, isolate the problem to a specific subsystem by comparing the current router activity to

the expected router activity.

The LEDs on the bottom panel of the router enable you to determine router performance and operation. For

a description of these LEDs, see

When solving a problem, check the following router subsystems:

OL-29732-02

Problem Solving , page 1

Reading LEDs , page 4

Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide

Reading LEDs , on page