ENTITY-SENSOR-MIB adds support for physical sensors
of networking equipment beyond what
ENTITY-MIB defines. Use this MIB in tandem with the ENTITY-MIB to monitor
the operational status of the physical components of a system (for
example, fans and temperature sensors). For example, to troubleshoot
issues that might result from environmental conditions, you can map
the entity indexes from the ENTITY-MIB (entPhysicalDescr object)
to operational status values (entPhysSensorOperStatus object) in
the ENTITY-SENSOR-MIB. In the following example, all the fans and temperature
sensors for a PA-3020 firewall are working: