Juniper EX9214

Maintaining the Fan Tray in EX9200 Switches
IN THIS SECTION
Purpose | 209
Acon | 209
Purpose
For opmum cooling, verify the condion of the fans.
Acon
• Monitor the status of the fans. A fan tray contains mulple fans that work in unison to cool the
switch components. If one fan fails, the host subsystem adjusts the speed of the remaining fans to
maintain proper cooling. A major alarm is triggered when a fan fails and a minor alarm and a major
alarm are triggered when a fan tray is removed.
• To display the status of the cooling system, issue the show chassis environment command. The output is
similar to the following:
user@switch> show chassis environment
Class Item Status Measurement
Temp PEM 0 OK 30 degrees C / 86 degrees F
PEM 1 OK 35 degrees C / 95 degrees F
PEM 2 Check
PEM 3 Absent
Routing Engine 0 OK 31 degrees C / 87 degrees F
Routing Engine 0 CPU OK 30 degrees C / 86 degrees F
Routing Engine 1 OK 33 degrees C / 91 degrees F
Routing Engine 1 CPU OK 31 degrees C / 87 degrees F
CB 0 Intake OK 30 degrees C / 86 degrees F
CB 0 Exhaust A OK 29 degrees C / 84 degrees F
CB 0 Exhaust B OK 36 degrees C / 96 degrees F
CB 0 ACBC OK 34 degrees C / 93 degrees F
CB 0 XF A OK 50 degrees C / 122 degrees F
CB 0 XF B OK 46 degrees C / 114 degrees F
CB 1 Intake OK 30 degrees C / 86 degrees F
209