Juniper Networks 8 manual Redundancy Status, Monitoring Temperatures of Modules

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	Increase space around system.
	meet specifications. (See “System
	Specifications” on page 119.)

Ambient temperature exceeds	Ambient temperature exceeds
specifications	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