Appendix; Troubleshooting; Problem Solving - Cisco 901 Installation Manual

Troubleshooting

The Cisco ASR 901 router undergoes extensive testing before it leaves 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:
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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 Cisco Information Packet publication that
shipped with your router. Before you call, have the following information ready:
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Note

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 front 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:
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OL-23778-01
Problem Solving, page A-1
Reading the LEDs, page A-4
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
Ensure you provide the customer service representative with any upgrade or maintenance
information that was performed on the Cisco ASR 901 router after your initial installation (see
Appendix C, "Site Log"
Power and cooling systems—External power source, power cable, router power supply and circuit
breaker, and router fans. Also check for inadequate ventilation or air circulation.
Modules—Checking the LEDs on the modules can help you to identify a failure.
Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
A P P E N D I X
for Site Log information.)
"Reading the LEDs" section on page
A
A-4.
A-1