TNETX3150 Datasheet, PDF (80/113 Pages) Texas Instruments – ThunderSWITCHE 15-PORT 10-/100-MBIT/S ETHERNETE SWITCH

TNETX3150/TNETX3150A
ThunderSWITCH^™ 15-PORT 10-/100-MBIT/S ETHERNET^™ SWITCH
SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997
glossary
address duplications
The number of address duplications between a 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:
1. 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).
2. 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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