Juniper Networks ERX Hardware 8 - Manual (Page 131)

Troubleshooting
Redundancy Status
You can determine the redundancy state of line modules by examining the ONLINE
and REDUNDANT status LEDs (ERX-7xx and ERX-14xx models only). See Table 14.
NOTE: The REDUNDANT LED on the cOCx/STMx, FE-8, GE/FE, HSSI, and
OCx/STMx modules is nonfunctional.
Table 14: Redundancy Status of a Line Module
ONLINE LED REDUNDANT LED State of the Line Module
Off Off Module is booting or is an
inactive primary line module.
On Off Module is active, but no
standby module is available.
Off On Module is in standby state.
On On Module is active, and a
standby module is available.
Monitoring Temperatures of Modules
You can view the temperature of each module by issuing the show environment all
and show environment table commands. In addition, the system generates detailed
log messages if the temperature of a module is outside normal operating limits.
For example, if the temperature of any forwarding controller exceeds 212° F
(100° C), a message appears on the console and the event is added to the system
log. If you receive this message, report it to your customer service representative.
If the temperature of any module exceeds the upper temperature limit,
the system immediately goes into thermal protection mode. After the
system has entered thermal protection mode, you must resolve the
cause of the high temperature quickly.
Table 15: Troubleshooting High-Temperature Conditions
Cause of High Operating
Temperature
Symptoms Resolution
Air vents to system are blocked Space around system does not
meet specifications. (See “System
Specifications” on page 119.) Increase space around system.
Ambient temperature exceeds
specifications Ambient temperature exceeds
specifications. (See “System
Specifications” on page 119.) Provide extra cooling or heating in the
room where the system is located.
Monitoring Temperatures of Modules 113