TNETX3150 datasheet(80/113 Pages) TI1

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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

address duplications

The

number

address

duplications

between

securely

assigned

port

address

within

the

TNETX3150/TNETX3150A and a source address observed on this port. Occurrence of this causes the

TNETX3150/TNETX3150A to suspend the port (see

port status register description).

address mismatches/address changes

The sum of:

The number of mismatches seen on a port between a securely assigned port address and the source

address observed on the port. Occurrence of this causes the TNETX3150/TNETX3150A to suspend the

port (see

port status register description).

The number of times the TNETX3150/TNETX3150A is required to assign or learn an address for a port.

Port statistics memory region 0x780–0x7FF.

broadcast RX frames

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

multicast packets.

broadcast TX frames

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

multicast packets. See IEEE Std 802.3 Supplements, Layer Management (section 5) 5.2.2.1.1, number 6.

carrier sense errors

The number of times the carrier sense condition was lost or never asserted when attempting to transmit a frame

on a particular interface. The count is incremented a maximum of once per transmission attempt, even if the

carrier sense condition fluctuates during a transmission attempt.

collisions port (03–14)

The number of times the port’s transmitter was required to send a jam sequence

The following counters are implemented in previously described counters.

deferred TX frames

A count of the frames for which the first transmission attempt on a particular interface was delayed because the

medium was busy

excessive collisions

A count of frames for which transmission on a particular interface fails due to excessive collisions

filtered RX frames

The count of frames received but discarded due to lack of resources (TXQ full, destination disabled, or RX

errors). The number of frames sent to the TNETX3150/TNETX3150A discard channel.

good RX frames

The total number of good packets (including unicast, broadcast packets and multicast packets) received

good TX frames

The total number of packets (including bad packets, broadcast packets, and multicast packets) transmitted

successfully. See IEEE Std 802.3 Supplements, Layer Management (section 5) 5.2.2.1.1, number 1.

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