The falling threshold is a value which specifies that any enabled falling threshold events are to be generated when the value of the currently available leases drops to the falling threshold value via an allocation of a lease from the range. The number of available leases is reported in rbnDhcpRangeThresholdAvailable. A falling threshold event is either a notification or a log message or both. Falling threshold events are enabled if either or both of rbnDhcpRangeThresholdFallingSendTrap and rbnDhcpRangeThresholdFallingLogMessage are true. Note, this is a falling threshold, so a falling threshold event will only be triggered on a transition of the value of rbnDhcpRangeThresholdAvailable dropping from (rbnDhcpRangeThresholdFallingThreshold+1) to rbnDhcpRangeThresholdFallingThreshold.