TNETX3150A datasheet(81/113 Pages) TI1

81 / 113 page

TNETX3150/TNETX3150A

ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

glossary (continued)

late collisions

The number of times that a collision is detected on a particular interface later than 512-bit times into the

transmission of a packet

multicast RX frames

The total number of good packets received that were directed to the multicast address. This does not include

packets directed to the broadcast address.

For the 100-Mbit/s ports, the counter records the sum of alignment errors and code errors (frame received with

RX error signal).

multicast TX frames

The total number of packets transmitted that were directed to a multicast address. This number does not include

packets directed to the broadcast address. See IEEE Std 802.3 Supplements, Layer Management (section 5)

5.2.2.1.1, number 7.

multiple-collision TX frames

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

than one collision

net octets

The total number of octets of data (including those in bad packets) received on the network (excluding framing

bits but including frame check sequence (FCS) octets). This object can be used as a reasonable indication of

Ethernet utilization.

oversize RX frames

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

FCS octets) and were otherwise well formed. If SYSCTRL option bit LONG is set, the number is 1536 octets.

RX align/code errors

For the 10-Mbit/s ports, the counter records alignment errors.

RX and TX frame 64

The total number of packets (including bad packets) received and transmitted that were 64 octets in length

(excluding framing bits but including FCS octets)

RX and TX frames 65–127

The total number of packets (including bad packets) received and transmitted that were between 65 and 127

octets in length inclusive (excluding framing bits but including FCS octets)

RX and TX frames 128–255

The total number of packets (including bad packets) received and transmitted that were between 128 and 255

octets in length inclusive (excluding framing bits but including FCS octets)

RX and TX frames 256–511

The total number of packets (including bad packets) received and transmitted that were between 256 and 511

octets in length inclusive (excluding framing bits but including FCS octets)

RX and TX frames 512–1023

The total number of packets (including bad packets) received and transmitted that were between 512 and 1023

octets in length inclusive (excluding framing bits but including FCS octets)

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