Juniper QFX10002 Hardware Manual page 57

Fan Module Status
You can check the status of fan modules through the show system alarms command or show chassis fan
commands or by looking at the LEDs next to each fan module. For example:
user@device> show chassis fan
Item
Tray 0 Fan 0
Tray 0 Fan 1
Tray 1 Fan 0
Tray 1 Fan 1
Tray 2 Fan 0
Tray 2 Fan 1
Each switch has a status LED (labeled ST) for each fan module on the left side of the corresponding fan
module slot. It indicates the status of all the fan modules.
on the fan module in a QFX10002.
Table 18: Fan Module Status LED
LED State
Solid Green
Solid Amber
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors
in the chassis monitor the temperature within the chassis.
The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises
above the acceptable range. If the temperature inside the chassis rises above the threshold temperature,
the system shuts down automatically.
Status RPM Measurement
Absent
Absent
OK 5000 Spinning at normal speed
OK 4400 Spinning at normal speed
OK 5000 Spinning at normal speed
OK 4400 Spinning at normal speed
Description
Indicates the individual fan module is present. After the hardware senses the
fan module, software ensures the airflow is consistent with the other fan
modules and that it is functioning correctly.
Indicates one of the following:
•
The fan module is not present.
•
The fan module is not functioning normally.
Table 18 on page 48 describes the status LED
48