Port Statistic

Description

 

 

Dot3StatsMultipleCollisionFrames

A count of successfully transmitted frames on a particular interface for

 

which transmission is inhibited by more than one collision. A frame that is

 

counted by an instance of this object is also counted by the corresponding

 

instance of either the ifOutUcastPkts, ifOutMulticastPkts, or

 

ifOutBroadcastPkts, and is not counted by the corresponding instance of

 

the dot3StatsSingleCollisionFrames object. This counter does not

 

increment when the interface is operating in full-duplex mode.

 

 

Dot3StatsSQETestErrors

A count of times that the SQE TEST ERROR message is generated by the

 

PLS sublayer for a particular interface. The SQE TEST ERROR is set in

 

accordance with the rules for verification of the SQE detection mechanism

 

in the PLS Carrier Sense Function as described in IEEE Std. 802.3, 1998

 

Edition, section 7.2.4.6. This counter does not increment on interfaces

 

operating at speeds greater than 10 Mb/s or operating in full-duplex

 

mode.

 

 

Dot3StatsDeferredTransmissions

A count of frames for which the first transmission attempt on a particular

 

interface is delayed because the medium is busy. The count represented

 

by an instance of this object does not include frames involved in collisions.

 

This counter does not increment when the interface is operating in

 

full-duplex mode.

 

 

Dot3StatsLateCollisions

The number of times that a collision is detected on a particular interface

 

later than one slotTime into the transmission of a packet. A late collision

 

included in a count represented by an instance of this object is also

 

considered a generic collision for purposes of other collision-related

 

statistics. This counter does not increment when the interface is operating

 

in full-duplex mode.

 

 

Dot3StatsExcessiveCollisions

A count of frames for which transmission on a particular interface fails

 

because of excessive collisions. This counter does not increment when the

 

interface is operating in full-duplex mode.

 

 

Dot3StatsInternalMacTransmitErrors

A count of frames for which the transmission on a particular interface fails

 

because of an internal MAC sublayer transmit error. A frame is only

 

counted by an instance of this object if it is not counted by the

 

corresponding instance of the dot3StatsLateCollisions object, the

 

dot3StatsExcessiveCollisions object, or the dot3StatsCarrierSenseErrors

 

object. The precise meaning of the count represented by an instance of

 

this object is implementation-specific. In particular, an instance of this

 

object may represent a count of transmission errors on a particular

 

interface that are not otherwise counted.

 

 

Dot3StatsCarrierSenseErrors

The number of times that the carrier sense condition was lost or never

 

asserted when attempting to transmit a frame on a particular interface.

 

The count represented by an instance of this object is incremented, at

 

most, once per transmission attempt, even if the carrier sense condition

 

fluctuates during a transmission attempt. This counter does not increment

 

when the interface is operating in full-duplex mode.

 

 

Dot3StatsFrameTooLongs

A count of frames received on a particular interface that exceeds the

 

maximum permitted frame size. The count represented by an instance of

 

this object is incremented when the frameTooLong status is returned by the

 

MAC service to the LLC (or other MAC user). According to the conventions

 

of IEEE 802.3 Layer Management, received frames for which multiple

 

error conditions are obtained are counted exclusively according to the

 

error status presented to the LLC.

 

 

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