User guide

Virtual Connect modules 242
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.