Water System User Manual

90 Chapter 3 Configuring and graphing ports
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Table 39 describes the Ethernet Errors tab fields.
Table 34 Ethernet Errors tab fields
Field Description
AlignmentErrors 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 occur
are, according to the conventions of IEEE 802.3 Layer
Management, counted exclusively according to the error
status presented to the LLC.
FCSErrors 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. 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 occur
are, according to the conventions of IEEE 802.3 Layer
Management, counted exclusively according to the error
status presented to the LLC.
InternalMacTransmitErrors A count of frames for which transmission on a particular
interface 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.
InternalMacReceiveErrors A count of frames for which reception on a particular
interface 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 may represent a count of
receive errors on a particular interface that are not otherwise
counted.
CarrierSenseErrors 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.