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Troubleshooting
Your Cisco 7401ASR router went through extensive testing before leaving the factory. However, if you
encounter problems starting the router, use the information in this chapter to help isolate the cause of the
problems. This chapter contains the following sections:
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The procedures in this chapter assume that you are troubleshooting the initial system startup, and that
your router is in the original factory configuration. If you have removed or replaced components or
changed any default settings, the recommendations in this chapter might not apply. Make sure to review
the safety warnings listed in the publication Cisco 7401ASR Regulatory Compliance and Safety
Information that accompanied your Cisco 7401ASR router before using the troubleshooting procedures
in this chapter.
Troubleshooting Overview
This section describes the troubleshooting methods used in this chapter and describes how the
Cisco 7401ASR router is divided into subsystems for more efficient problem solving. If you are unable
to easily solve the problem, contact a customer service representative for assistance and further
instructions. Provide the representative with the following information:
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The following table shows the general troubleshooting strategy described in this appendix. Refer to this
table, as necessary, to follow the steps to isolate problems to a specific subsystem; resolve the problem
if possible.
OL-5419-01 B0
Troubleshooting Overview, page 5-1
Problem Solving Using a Subsystems Approach, page 5-2
Upgrading the Boot Helper (Boot Loader) Image, page 5-7
PXF Troubleshooting Information, page 5-8
Date you received the router
Chassis serial number
Type of software and release number
Brief description of the problem you are having
Brief explanation of the steps you have taken to isolate and resolve the problem
Maintenance agreement or warranty information
C H A P T E R
Cisco 7401ASR Installation and Configuration Guide
5
5-1
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Table of Contents
Troubleshooting
