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IDL series User Guide
314
Carrier Sense Errors : 18 Too Long Frames : 19
Mac Rx Error Frames : 20 Duplex Status :
FullDuplex
Output field:
Field Description
IfName
An index name that uniquely identifies an interface to an
ethernet-like medium.
Alignment Errors
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). Received frames
for which multiple error conditions pertain are, according to the
conventions of IEEE 802.3 Layer Management, counted
exclusively according to the error status presented to the LLC.
This counter does not increment for group encoding schemes
greater than 4 bits per group. For interfaces operating at 10 Gb/s,
this counter can roll over in less than 5 minutes if it is
incrementing at its maximum rate. Since that amount of time
could be less than a management station's poll cycle time, in
order to avoid a loss of information, a management station is
advised to poll the dot3HCStatsAlignmentErrors object for 10
Gb/s or faster interfaces. Discontinuities in the value of this
counter can occur at re-initialization of the management system,
and at other times as indicated by the value of
ifCounterDiscontinuityTime.
FCS Errors
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
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). Received frames for which multiple
error conditions pertain are, according to the conventions of IEEE
802.3 Layer Management, counted exclusively according to the
error status presented to the LLC. For interfaces operating at 10
Gb/s, this counter can roll over in less than 5 minutes if it is
incrementing at its maximum rate. Since that amount of time
could be less than a management station's poll cycle time, in