Cisco ASR 901S Series Troubleshooting

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.
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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 4.
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