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10
Troubleshooting
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.
Diagnosing Problems
Your initial response to a system problem should be to:
1 Check power connections.
2 Observe the system’s LEDs carefully.
3 Check cable connections on the system modules.
If a problem is beyond the scope of this chapter, refer to Appendix C,
Customer Support for further instructions.
Note: Running the show version and show hardware commands is often a good
first step when trying to troubleshoot a problem.
Topic Page
Diagnosing Problems 10-1
Troubleshooting Power Failures 10-2
Understanding Status LEDs to Troubleshoot 10-2
Monitoring Temperatures of Modules 10-9
Resetting Line Modules and SRP Modules 10-10
Double-Bit Errors on SRP Modules 10-10