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
ethIfSnkMinorReducedBitRateHighThreshold must be used to set
or report the threshold value. A value of 0 disables the
reduced bit rate detection.