N8406-023 1Gb Intelligent L3 Switch Command Reference Guide (ISCLI) 59
The following table describes the Ethernet statistics for a selected port:
Table 47 Ethernet statistics for port
Statistics
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 Frame
Check Sequence (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 Logical Link Control (LLC) (or other MAC user).
Received frames for which multiple error conditions obtained are,
according to the conventions of IEEE 802.3 Layer Management,
counted exclusively according to the error status presented to the
LLC.
dot3StatsFCSErrors
A count of frames received on a particular interface that are an
integral number of octets in length but do not pass the Frame
Check Sequence (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 obtained are,
according to the conventions of IEEE 802.3 Layer Management,
counted exclusively according to the error status presented to the
LLC.
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 the ifOutUcastPkts,
ifOutMulticastPkts, or ifOutBroadcastPkts, and is not counted by the
corresponding instance of the dot3StatsMultipleCollisionFrame
object.
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.
dot3StatsLateCollisions
The number of times that a collision is detected on a particular
interface later than 512 bit-times into the transmission of a packet.
Five hundred and twelve bit-times corresponds to 51.2
microseconds on a 10 Mbit/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.
dot3StatsExcessiveCollisions
A count of frames for which transmission on a particular interface
fails due to excessive collisions.
dot3StatsInternalMacTransmitError
s
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
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.
