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HP 1.10GB Virtual Connect Ethernet Module for c-Class BladeSystem User Manual

Page 169

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Port Statistic

Description

Dot3StatsAlignmentErrors

A count of frames received on a particular interface that are not an

integral number of octets in length and do not pass the FCS check. The

count represented by an instance of this object is incremented when the

alignmentError 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. This counter does not increment for 8-bit wide group encoding

schemes.

Dot3StatsFCSErrors

A count of frames received on a particular interface that are an integral

number of octets in length but do not pass the FCS check. This count does
not include frames received with a frame-too-long or frame-too-short error.

The count represented by an instance of this object is incremented when

the frameCheckError 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. Coding errors detected by the physical layer for speeds above

10 Mb/s will cause the frame to fail the FCS check.

Dot3StatsSingleCollisionFrames

A count of successfully transmitted frames on a particular interface for

which transmission is inhibited by exactly 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 dot3StatsMultipleCollisionFrames object. This counter does not

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

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 as a (generic) collision for purposes of other collision-related

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

in full-duplex mode.