This field records how much the counter for frames that were eventually transmitted successfully but only after more than one collision on the wire increased during the most recent collection interval, rather than the lifetime cumulative total. For a network admin, this is a milder cousin of excessCollision on the same interface, and a rising trend here can be an early warning of the same duplex or loading problem before it gets bad enough to actually drop frames. For example, 2 frames in the last interval on this specific FCoE path would already be worth a closer look, since this counter should normally sit at or near zero.