The tolerance level used to calculate the
fault warning threshold for this fault type.
The agent will periodically check relevant
statistics for each port for each type of fault.
If the warning threshold has been exceeded, and
fault warning action is enabled for that fault
type, an hpicfFaultFinderTrap notification will
be sent. In addition, an entry will be made in
the hpicfFfLogTable for the fault. Once a fault
warning has fired, a hysteresis mechanism assures
that another warning will not be fired until the
relevant counter drops below a hysteresis
threshold value.