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F5 Big-IP: System fans

Distribution: official part of Check_MK
License: GPL
Supported Agents: SNMP

The check queries the MIB tables of F5 BIG-IP loadbalancers (local traffic managers) for the status of builtin fans. It will alert if the rotational speed falls below user-definable levels.

It supports devices running the 9.0 and above releases of the F5 OS. It's tested against 9.3 devices.


The check gather a list of the existing fans in a system. It labels them as either chassis or CPU fans.