Check manual page of genua_fan
Genuscreen: Fan State and RPM
This check monitors the state and rpm of fans found on genuscreen firewalls.
Lower and upper levels for the rpm may be given.
The check is known to run with genuscreen version 3.0 and 4.1, and supports
genuas regular enterprise id 3717 as well as the id 3137 which was
introduced in a bug in some versions of genuscreen.
The name of the fan according to the snmp output
The inventory process checks if the device has a system description OID
of .18.104.22.168.22.214.171.124.0 and if the name of this OID contains "genuscreen"
If this is true and a fan is found, then the it is inventorized.