Viewing MLT Ethernet Error Statistics

AlignmentErrors

Specifies the frame count frames received on a particular MLT that is not an integral number of octets in length and does not pass the FCS check. The count represented by an instance of this object increments when the alignmentError status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions occur are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.

FCSErrors

Specifies the frame count received on an MLT that is an integral number of octets in length, but does not pass the Frame Check Sequence (FCS) check. The count represented by an instance of this object increments when the FrameCheckError status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions occur are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.

IMacTransmitError

Specifies the frame count for which transmission on a particular MLT fails due to 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 either the LateCollisions object, the ExcessiveCollisions object, or the CarrierSenseErrors object.

IMacReceiveError

Specifies the frame count for which reception on a particular MLT fails due to an internal MAC sublayer receive error. A frame is only counted by an instance of this object if it is not counted by the corresponding instance of either the FrameTooLongs object, the AlignmentErrors object, or the FCSErrors object.

The precise meaning of the count represented by an instance of this object is implementation specific. In particular, an instance of this object can represent receive errors on a particular interface that are not otherwise counted.

CarrierSenseError

Specifies the number of times that the carrier sense condition was lost or never asserted when attempting to transmit a frame on a particular MLT. The count represented by an instance of this object increments at most once for each transmission attempt, even if the carrier sense condition fluctuates during a transmission attempt.

FrameTooLong

Specifies the frame count received on a particular MLT that exceeds the maximum permitted frame size. The count represented by an instance of this object increments when the frameTooLong status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions occur are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.

SQETestError

Specifies the number of times that the SQE test error message is generated by the PLS sublayer for a particular MLT. The SQE test error message is defined in section 7.2.2.2.4 of ANSI/ IEEE 802.3-1985.

DeferredTransmiss

Specifies the frame count for which the first transmission attempt on a particular MLT is delayed because the medium is busy. The count represented by an instance of this object does not include frames involved in collisions.

SingleCollFrames

Specifies a count of successfully transmitted frames on a particular MLT 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 object, the ifOutMulticastPkts object, or the ifOutBroadcastPkts object, and is not counted by the corresponding instance of the MultipleCollisionFrames object.

MultipleCollFrames

Specifies the successfully transmitted frame count on a particular MLT 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 object, the ifOutMulticastPkts object, or the ifOutBroadcastPkts object, and is not counted by the corresponding instance of the SingleCollisionFrames object.

LateCollisions

Specifies the number of times that a collision is detected on a particular MLT later than 512 bit-times into the transmission of a packet; 512 corresponds to 51.2 microseconds on a 10 Mb/s system. 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.

ExcessiveCollis

Specifies the frame count for which transmission on a particular MLT fails due to excessive collisions.