MOP Counters
Table G–1 (Cont.) MOP Counter Block
V3
V4
Name
Off Len
Off Len
Description
TxFAIL_REMOTE_DEFER
-
-
80 8
Send failure - Remote failure
to defer.
3
A remote system
began transmitting after the
allowed window for collisions.
This indicates either a problem
with some other system’s carrier
sense or a weak transmitter.
RxFAIL_COUNT
2A 2
-
-
Receive failure count.
2
The total
number of frames received with
some data error. Includes only
data frames that passed either
physical or multicast address
comparison. This counter includes
failure reasons in the same way
as the send failure counter. In
conjunction with total frames
received, provides a measure of
data related receive problems.
RxFAIL_BITMAP contains the
possible reasons.
RxFAIL_BITMAP
2C 2
-
-
Receive failure reason bitmap.
2
This bitmap lists the types of
receive failures that occurred as
summarized below.
0 - Block check failure.
1 - Framing error.
2 - Frame too long.
RxFAIL_BLOCK_CHECK
-
-
88 8
Receive failure - Block check
error.
A frame failed the CRC
check. This indicates several
possible failures, such as EMI,
late collisions, or improperly set
hardware parameters.
2
V3 send/receive failures are collapsed into one counter with bitmap indicating which failures
occurred.
3
Always zero.
(continued on next page)
MOP Counters
G–7
