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ERX 11.1.x Hardware Guide
Troubleshooting Power Failures
The system's distributed power system is designed to consume low levels of power
and dissipate low levels of heat. See "System Specifications" on page 109 for
specifications of power consumption and heat dissipation. If you suspect a power
problem, see Table 9 on page 96.
Table 9: Causes of Power Failures
Symptom
Possible Problems
System does not
System is not receiving
power up.
power.
Module's power supply has
malfunctioned.
Power source cannot handle
system load.
System shuts
Temperature is too high.
down.
Power is lost.
Understanding Status LEDs to Troubleshoot
Module LEDs can show you the current status of a module and alert you to a problem
with the module or one of its ports. We recommend you familiarize yourself with
LED activity so that you can easily detect and correct a module-related problem with
minimal or no system downtime.
LED Identification
The system's modules have two sets of status LEDs. The top set indicates overall
router and module status. The bottom set indicates module-specific status, such as
port status (line modules) or fan status (SRP module).
The number next to the port status LED on a line module corresponds to the number
of the port on the I/O module. Some line modules have more port status LEDs than
the number of ports on the I/O module. In these cases, only the LEDs for the
corresponding ports on the I/O modules are active.
96
Troubleshooting Power Failures
Actions
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. See "System Specifications"
on page 109.
3.
If the system still does not operate, contact Juniper Networks
Customer Service.
The following actions apply to all of the possible problems:
1.
Verify that power connections are properly attached.
2.
Verify that system is receiving power.
3.
Look to see whether or not the LEDs are lit.
4.
Run diagnostics on SRP and line modules.
5.
If system does not not reset, contact Juniper Networks Customer
Service.
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Table of Contents
Troubleshooting
