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CHAPTER 8
Troubleshooting
8-2
LED Activity
Module LEDs can show you the immediate status of a module and alert
you to a problem with the module or one of its ports. It is helpful to
familiarize yourself with LED activity so that you can easily detect and
correct a module-related problem with minimal or no system downtime.
See Table 8-2 and Table 8-3 for specific information on normal LED
activity. See Table 8-4 for specific information on troubleshooting
abnormal LED activity.
Module Cables
See Chapter 4, Cabling the ERX System, for information about cabling
modules.
Initialization Sequence
Each ERX 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.”
Troubleshooting Power Failures
The system’s distributed power system is designed to consume low levels
of power and dissipate low levels of heat. See Appendix A, System
Specifications for specifications of power consumption and heat
dissipation. If you suspect a power problem, refer to Table 8-1.
Table 8-1 Causes of power failures
Symptom Possible Problems Actions
System does not power
up.
• System is not receiving
power.
• A module’s power supply
has malfunctioned.
• Power source cannot
handle system load.
Note: The following actions apply to all of the possible
problems.
1 Verify that all power connections are correct.
2 Verify that the power supply is delivering the correct
voltage, current, and wattage to the system. Refer to
Appendix A, System Specifications.
3 If the system still does not operate, contact Juniper
Networks Customer Service.