This object specifies the clear high threshold in percentage
of available public ports that are used up. The notification
cNatCgnNotifPortUsageWatermarkHighClear is sent once the value
of cNatCgnCounterAveragePortAllocation becomes less than or
equal to this value. If this object is set to zero, the
notification is not generated.
Implementations must ensure that values of objects
cNatCgnCounterPortUsageClearHighThreshold and
cNatCgnCounterPortUsageHighThreshold remain consistent. For
example, an implementation must respond with an
inconsistentValue error if an attempt is made to set the the
value of cNatCgnCounterPortUsageClearHighThreshold to be more
than or equal to that of cNatCgnCounterPortUsageHighThreshold
and vice versa.