Juniper E Series User Manual

Diagnosing Problems ! 99
Chapter 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.
Initialization Sequence
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.”
Topic Page
Diagnosing Problems
99
Troubleshooting Power Failures
100
Understanding Status LEDs to Troubleshoot
100
Monitoring Temperatures of Modules
107
Resetting Line Modules and SRP Modules
107
Double-Bit Errors on SRP Modules
108
NOTE: Running the show version and show hardware commands is often a good
first step when trying to troubleshoot a problem.

Juniper E Series Specifications

General

Brand	Juniper
Model	E Series
Category	Network Router
Language	English