Check manual page of netextreme_fan
Extreme Networks Switch: Fan State and Speed
This check monitors the fan state and speed of a Extreme Networks Switch
which supports the EXTREME-MIB.
The fan state can be 'on' or 'off'.
Upper and lower default levels are 8000, 8400 and 2000, 1000 measured in RPM
and are configurable.
The fan number.
One service per fan is created.