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April, 2002
L84302 Quad 4-Port Ethernet Controller - Technical Manual
Copyright 1997-2002 by LSI Logic Corporation. All rights reserved.
Notes:
1.
Bad RX packet = legal-length error, CRC error , alignment error.
CRC Error is bad FCS with an integral number of octets.
Alignment Error is bad FCS with non-integral number of octets.
2.
Bad TX packet = legal length error , carrier sense dropout error,
late collision, excess collision, transmit FIFO underflow
3.
Legal-length packet is between 64 and Max_Packet_Length in bytes.
Preamble is not included in length count.
4.
Max_Packet_Length defaults to 1518 bytes but can be programmed
to any value from 1518-1533 bytes.
5.
All TX packet counts include retries, unless specifically excluded.
6.
RMON specs literally state that packet and octet counters should
only tabulate received information. This is sometimes interpreted to
dot3StatsExcessive
Collisions
TX
Packets not successfully transmitted
after more than 15 collisions (i.e.:
attempt value=16). Equivalent to
“aFrameAbortedDueToXSCollisions”
Packets with transmit FIFO underflow
error. Equivalent to “aFrameAborted
DueToIntMACXmitError”
Carrier sense dropout errors, i.e. num-
ber of times that carrier sense is not
asserted or deasserted during packet
transmission, without a collision. Equiv-
alent to “aCarrierSenseErrors”
Packets with receive FIFO overflow
error. Equivalent to
“aFramesLostDueToIntMACRcvrError”
Packets of length > Max_Packet_Length
with no other errors. Equivalent to
“aFrameTooLongErrors”
Number of times SQE was detected.
Equivalent to “aSQETESTErrors”
Use Ctr.
#41
dot3StatsInternalMAC
TransmitErrors
TX
Use Ctr.
#28
dot3StatsCarrierSense
Errors
TX
Use Ctr.
#42
dot3StatsInternalMAC
ReceiveErrors
RX
Use Ctr.
#1
dot3StatsFrameTooLongs
RX
Use Ctr.
#4
dot3StatsSQETESTErrors
RX
Use Ctr.
#51
Table 12
Counter Definition (Cont.)
Ctr.
#
Counter Name
(MIB Object Name)
Counter Definition
RX/
TX
Description
Size
(Bits)
Register
Address
A[7:1]