Juniper E Series User Manual

Monitoring Temperatures of Modules ! 107
Chapter 10: Troubleshooting
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.
If the temperature of any module exceeds the upper temperature limit, the system
immediately goes into thermal protection mode. Once the system has entered
thermal protection mode, you must resolve the cause of the high temperature.
When you have resolved the cause of the high temperature, you must power cycle
the system to reset the modules.
Resetting Line Modules and SRP Modules
Two recessed buttons on line modules and SRP modules provide the mechanisms
for resetting. You can use the NMI button to reset the software on the module and
the board reset button to reset the module. See Figure 12 on page 12.
If a line module fails to respond for an extended time, there may be a software
problem with that module. You can depress the software reset button with a paper
clip to suspend the current software task. Depending on the situation, this action
may also reset the software on the module.
Table 15: 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.
Table 16: 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 Chapter 11, System
Specifications).
Increase space around system.
Ambient temperature exceeds
specifications
Ambient temperature exceeds
specifications (see Chapter 11, System
Specifications).
Provide extra cooling or heating in the
room where the system is located.
Cooling fan failure
! FAN OK LED on SRP module is not
illuminated.
! FAN FAIL LED on SRP module is
illuminated.
Replace fan tray (see Chapter 9,
Maintaining E-series Routers).
Module failure FAIL LED on module is illuminated. Replace module (see Chapter 5, Installing
Modules).

Juniper E Series Specifications

General

Brand	Juniper
Model	E Series
Category	Network Router
Language	English