Troubleshoot Temperature Alarms In Ex Series Switches - Juniper EX8208 Hardware Manual

Tighten the captive screws on the faceplate of the line card to ensure that the line card is seated correctly
in the slot in the switch chassis.
SEE ALSO
Line Card Model and Version Compatibility in an EX8200 Switch | 84

Troubleshoot Temperature Alarms in EX Series Switches

Problem
Description: EX Series switches generate a temperature alarm FPC 0 EX-PFE1 Temp Too Hot.
Cause
Temperature sensors in the chassis monitor the temperature of the chassis. The switch raises an alarm if
a fan fails or if the temperature of the chassis exceeds permissible levels.
Solution
When the switch raises a temperature alarm such as the FPC 0 EX-PFE1 Temp Too Hot alarm, use the
show chassis environment and the show chassis temperature-thresholds commands to identify the
condition that triggered the alarm.
CAUTION:
exceeds the maximum recommended ambient temperature. To prevent airflow
restriction, allow at least 6 inches (15.2 cm) of clearance around the ventilation
openings.
1. Connect to the switch by using Telnet and issue the show chassis environment command. This command
displays environmental information about the switch chassis, including the temperature, and information
about the fans, power supplies, and Routing Engines. Following is a sample output on an EX9208 switch.
The output is similar on other EX Series switches.
user@switch> show chassis environment
Class Item
Temp PEM 0
PEM 1
PEM 2
PEM 3
To prevent the switch from overheating, do not operate it in an area that
Status
OK
OK
Absent
Absent
Measurement
40 degrees C / 104 degrees F
40 degrees C / 104 degrees F
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