| Description | The number of multiplicative downward congestion window
adjustments due to all forms of congestion signals,
including Fast Retransmit, Explicit Congestion Notification
(ECN), and timeouts. This object summarizes all events that
invoke the MD portion of Additive Increase Multiplicative
Decrease (AIMD) congestion control, and as such is the best
indicator of how a cwnd is being affected by congestion.
Note that retransmission timeouts multiplicatively reduce
the window implicitly by setting ssthresh, and SHOULD be
included in tcpEStatsPerfCongSignals. In order to minimize
spurious congestion indications due to out-of-order
segments, tcpEStatsPerfCongSignals SHOULD be incremented in
association with the Fast Retransmit algorithm. |