8101 Datasheet, PDF (71/172 Pages) LSI Computer Systems – Gigabit Ethernet Controller

Table 2.14 Counter Definition (Cont.)
Counter Description
Counter Counter Name
Number (MIB Object Name)
RX/TX Definition
Size
(Bits)
Register
Address
REGAD[7:0]
(Low/High)
42
dot3StatsLateCollisions
Packets that encounter a late collision,
i.e. encountered collisions more than
512-bit times into transmitted packet.
A late collision is counted twice:
as a collision and a late collision.
Since controller is Full Duplex only,
0b11010010
TX
this counter is undefined.
32
0b11010011
Packets not successfully transmitted
after more than 15 collisions
(ie: attempt value=16).
Since controller is Full Duplex only,
dot3StatsExcessiveCollisions
TX
this counter is undefined.
0b11010100
0b11010101
Packets with transmit FIFO underflow
error.
43
dot3StatsInternalMacTransmitErrors TX
Equivalent to "ifOutDiscards"
32
Use Ctr. #34
dot3StatsCarrierSenseErrors
Carrier sense dropout errors, i.e.
number of times that carrier sense is
not asserted or deasserted during
packet transmission, without a collision.
This counter is only incremented once
per packet, regardless of the number of
dropout errors in the packet.
There is no CRS loopback in 8B10B
TX
Ethernet, so this counter is undefined.
0b11010110
0b11010111
dot3StatsFrameTooLongs
Packets of length > Max_Packet_Length
with no other errors.
RX
Equivalent to "etherStatsOversizePkts"
Use Ctr. #8
Packets with receive FIFO overflow
error.
44
dot3StatsInternalMacReceiveErrors RX
Equivalent to "etherStatsDropEvents" 32
Use Ctr. #1
Ethernet MIB (IEEE 802.3z Clause 30)
aFramesTransmittedOK
All packets, good only.
Equivalent to
TX
"etherStatsPkts_TX - ifOutErrors"
Use Ctr.
#19 through
35
44
aSingleCollisionFrames
Packets successfully transmitted after
one and only one collision (ie: attempt
value = 2).
Equivalent to
TX
"dot3StatsSingleCollisionFrames"
32
Use Ctr. #38
Counters
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