12.2.1.4.6.18.8.6 Collisions (Offset = 3A248h - Port 1)
Ethernet port 1
This statistic records the total number of times that the port experienced a collision. Collisions occur under two circumstances.
When a transmit data or MAC control frame:
Was destined for any unicast, broadcast or multicast address
Was any size
Had no carrier loss and no underrun
Experienced a collision. A jam sequence is sent for every non-late collision, so this statistic will increment on each occasion if a frame experiences multiple collisions (and increments on late collisions)
CRC errors have no effect upon this statistic.
When the port is in half-duplex mode, flow control is active, and a frame reception begins.