| Description | For a clause 9 repeater port, this counter is
incremented by one for each CarrierEvent
on this port in which the CollIn(X)
variable transitions to the value SQE (Ref:
9.6.6.2, IEEE 802.3 Std) while the
ActivityDuration is greater than the
LateEventThreshold. For a clause 27 repeater
port, this counter is incremented by one on
entering the Collision Count Increment state
of the partition state diagram (fig 27-8)
while the ActivityDuration is greater than
the LateEvent- Threshold. Such a CarrierEvent
is counted twice, as both a collision and as a
lateEvent.
The LateEventThreshold is greater than 480 bit
times and less than 565 bit times.
LateEventThreshold has tolerances included to
permit an implementation to build a single
threshold to serve as both the LateEventThreshold
and ValidPacketMinTime threshold.
A discontinuity may occur in the value
when the value of object
rptrMonitorPortLastChange changes.
The approximate minimum time for rollover of this
counter is 81 hours in a 10Mb/s repeater. |