This attribute counts the number of frames with the Discard
Eligibility (DE) bit set sent to the link since the start of the interval.
Subtract the value of this attribute from totalEgressFrames to
calculate total frames, with DE set to 0, sent to the link.The start of
the interval is captured in the startTime attribute. The count is reset
to zero when an accounting record is generated call setup. If the
accountingEnabled attribute is no, then this attribute is not
displayed.