TNETX3100 datasheet(54/80 Pages) TI1

54 / 80 page

TNETX3100

ThunderSWITCH™ 10-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS031D – JUNE 1997 – REVISED OCTOBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

glossary (continued)

RX and TX frames 1024–1518

The total number of packets (including bad packets) received and transmitted that were between 1024 and 1518

octets in length inclusive (excluding framing bits but including FCS octets). If the LONG bit is set, this statistic

counts frames that are between 1024 and 1535 octets in length inclusive (excluding framing bits but including

FCS octets).

RX CRC errors

A count of frames received on a particular interface that is an integral number of octets in length but does not

pass the FCS check.

RX H/W errors

The function of this counter is performed by the filtered RX frames counter.

RX fragments

The total number of packets received that were less than 64 octets in length (excluding framing bits, but

including FCS octets) and had either a bad FCS with an integral number of octets (FCS error) or a bad FCS

with a nonintegral number of octets (alignment error).

RX jabbers

The total number of packets received that were longer than 1518 octets (excluding framing bits, but including

FCS octets), and had either a bad frame-check sequence (FCS) with an integral number of octets (FCS error)

or a bad FCS with a nonintegral number of octets (alignment error). If the LONG bit in the system control register

is set, RX jabber is redefined as being longer than 1535 octets.

RX octets

This contains a count of data and padding octets in frames that were successfully received. This does not

include octets in frames received with frame-too-long, FCS, length, or alignment errors. (IEEE Std 802.3

Supplements, Layer Management (section 5) 5.2.2.1.3, number 2).

RX overruns port (00–09)

The number of frames lost due to a lack of resources during frame reception. This counter is incremented when

frame data cannot enter the RX FIFO for any reason. Frames that overrun after entering the FIFO also can be

counted as RX discards (if they are not cut-through).

single-collision TX frames

A count of successfully transmitted frames on a particular interface for which transmission is inhibited by exactly

one collision.

signal-quality error (SQE) test errors

A count of times that the SQE test error is generated by the PHY sublayer for a particular interface. The SQE

test error is defined in section 7.2.2.2.4 of ANS/IEEE Std 802.3-1985 and its generation is described in

section 7.2.4.6 of the same document.

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