Juniper EX4300 Series

Troubleshoot Temperature Alarms in EX Series Switches
IN THIS SECTION
Problem | 334
Cause | 334
Soluon | 334
Problem
Descripon
EX Series switches trigger a temperature alarm FPC 0 EX-PFE1 Temp Too Hot when the switch temperature
becomes too hot.
Cause
Temperature sensors in the chassis monitor the temperature of the chassis. The switch triggers an alarm
if a fan fails or if the temperature of the chassis exceeds permissible levels for some other reason.
Soluon
When the switch triggers 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 idenfy the condion that
triggered the alarm.
CAUTION: To prevent the switch from overheang, operate it in an area with an
ambient temperature within the recommended range. To prevent airow restricon,
allow at least 6 inches (15.2 cm) of clearance around the venlaon openings.
1. Connect to the switch by using Telnet, and issue the show chassis environment command. This command
displays environmental informaon about the switch chassis, including the temperature. The
command also displays informaon about the fans, power supplies, and Roung Engines. Following is
a sample output on an EX9208 switch. The output is similar on other EX Series switches.
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