User`s guide

MOP Counters
Table F–1 (Cont.) MOP Counter Block
V3 V4
Name Off Len Off Len Description
Tx_INIT_DEFFERED 1A 4 40 8 Frames sent
1
, initially deferred.
The total number of times that a
frame transmission was deferred
on its first transmission attempt.
In conjunction with total frames
sent, measures Ethernet contention
with no collisions.
Tx_ONE_COLLISION 1E 4 48 8 Frames sent
1
, single collision.
The total number of times that a
frame was successfully transmitted
on the second attempt after
a normal collision on the first
attempt. In conjunction with total
frames sent, measures Ethernet
contention at a level where there
are collisions but the backoff
algorithm still operates efficiently.
Tx_MULTI_COLLISION 22 4 50 8 Frames sent
1
, multiple
collisions. The total number of
times that a frame was successfully
transmitted on the third or later
attempt after normal collisions on
previous attempts. In conjunction
with total frames sent, measures
Ethernet contention at a level
where there are collisions and
the backoff algorithm no longer
operates efficiently.
NO SINGLE
FRAME IS COUNTED IN MORE THAN ONE
OF THE ABOVE THREE COUNTERS.
1
Only one of these three counters will be incremented for a given frame.
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F–4 MOP Counters