Reduced Bit Rate threshold in bits per second that is needed
for generating a minor alarm. If the threshold for the
interface is greater than the maximum value reportable by
this object then this object should report its maximum value
(4,294,967,295) and ethIfSrcMinorReducedBitRateHighThreshold
must be used to set or report the threshold value. A value
of 0 disables the reduced bit rate detection.