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.