Table of Contents
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Chapter 9
Troubleshooting
Diagnosing Problems
Initialization Sequence
This chapter explains how you can troubleshoot a specific problem, such as abnormal
LED activity or no system power, when you power up the router. It contains the
following sections:
Diagnosing Problems on page 79
Troubleshooting Power Failures on page 80
Understanding Status LEDs to Troubleshoot on page 80
Monitoring Temperatures of Modules on page 85
Resetting Line Modules and SRP Modules on page 86
Double-Bit Errors on SRP Modules on page 86
When you first encounter a system problem:
Make sure power connections are secure attached.
1.
Observe the system's LEDs carefully.
2.
Make sure cable connections on the system modules are securely attached.
3.
If a problem is beyond the scope of this chapter, see "Contacting Customer Support
and Returning Hardware" on page 113 for further instructions.
NOTE: Running the show version, show hardware, and show environment
commands is often a good first step when trying to troubleshoot a problem.
Each line module is initialized independently. As a result, the command-line interface
(CLI) on the switch route processor (SRP) module might become available before the
line modules have completed initialization. Commands relating to a line module
might fail if the module has not completed initialization. Use the show version
command to display line module status. Do not enter commands for a line module
until its state is online.
79
Diagnosing Problems
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Table of Contents
Troubleshooting
