User`s guide

MOP Counters
Table F–1 (Cont.) MOP Counter Block
V3 V4
Name Off Len Off Len Description
TxFAIL_COUNT 26 2 - - Send failure count
2
. The
total number of times a transmit
attempt failed. Each time the
counter is incremented, a type of
failure is recorded. When Read-
counter function reads the counter,
the list of failures is also read.
When the counter is set to zero,
the list of failures is cleared. In
conjunction with total frames sent,
provides a measure of significant
transmit problems. TxFAIL_
BITMAP contains the possible
reasons.
TxFAIL_BITMAP 2C 2 - - Send failure reason bitmap
2
.
This bitmap lists the types of
transmit failures that occurred as
summarized below:
0 - Excessive collisions
1 - Carrier detect failed
2 - Short circuit
3 - Open circuit
4 - Frame too long
5 - Remote failure to defer
TxFAIL_EXCESS_COLLS - - 58 8 Send failure—Excessive colli-
sions. Exceeded the maximum
number of retransmissions due to
collisions. Indicates an overload
condition on the Ethernet.
2
V3 send/receive failures are collapsed into one counter with bitmap indicating which failures
occurred.
(continued on next page)
MOP Counters F–5