Troubleshooting Power Failures; Understanding Status Leds To Troubleshoot; Led Identification - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - ERX HARDWARE GUIDE REV 26-9-2010 Hardware Manual

ERX 11.3.x Hardware Guide

Troubleshooting Power Failures

Table 9: Causes of Power Failures
Symptom Possible Problems
System does not System is not receiving power.
power up.
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

LED Identification

96
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.
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.
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.
For example, an OCx/STMx line module can pair with either an OC3-4 or an OC12/STM4
I/O module. Consequently, the line module has four port status LEDs for OC3/STM1
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.
Copyright © 2010, Juniper Networks, Inc.