Troubleshooting; Diagnosing Problems; Initialization Sequence; Chapter 10 Troubleshooting - Juniper E Series Hardware Manual

Chapter 10

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.
Topic
Diagnosing Problems
Troubleshooting Power Failures
Understanding Status LEDs to Troubleshoot
Monitoring Temperatures of Modules
Resetting Line Modules and SRP Modules
Double-Bit Errors on SRP Modules
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.
Running the show version and show hardware commands is often a good
NOTE:
first step when trying to troubleshoot a problem.
Each E-series line module is initialized independently. As a result, the CLI on the
SRP module may become available before the line modules have completed
initialization. Commands relating to a line module may fail if the module has not
completed initialization. The show version command can be used to display line
module status. Do not enter commands for a line module until its state is "online."
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Diagnosing Problems

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