HP Virtual Connect for c-Class BladeSystem Version 2.30 User Guide

Hardware information screens 147
Port Statistic Description
collision-related statistics. This counter does not increment when the
interface is operating in full-duplex mode.
Dot3StatsExcessiveCollisions A count of frames for which transmission on a particular interface fails
due to excessive collisions. This counter does not increment when the
interface is operating in full-duplex mode.
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.
Dot3StatsCarrierSenseErrors 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. This counter does not
increment when the interface is operating in full-duplex mode.
Dot3StatsFrameTooLongs A count of frames received on a particular interface that exceeds the
maximum permitted frame size. The count represented by an instance
of this object is incremented when the frameTooLong 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.
Dot3StatsInternalMacReceiveErrors 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 dot3StatsFrameTooLongs object,
the dot3StatsAlignmentErrors object, or the dot3StatsFCSErrors 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.
Dot3StatsSymbolErrors For an interface operating at 100 Mb/s, the number of times an
invalid data symbol occurred when a valid carrier was present. For an
interface operating in half-duplex mode at 1000 Mb/s, the number of
times the receiving media is non-idle (a carrier event) for a period of
time equal to or greater than slotTime, and during which there was at
least one occurrence of an event that causes the PHY to indicate 'Data
reception error' or 'carrier extend error' on the GMII.
For an interface operating in full-duplex mode at 1000 Mb/s, the
number of times the receiving media is non-idle (a carrier event) for a
period of time equal to or greater than minFrameSize, and during
which there was at least one occurrence of an event that causes the
PHY to indicate 'Data reception error' on the GMII. The count
represented by an instance of this object is incremented, at most, once
per carrier event, even if multiple symbol errors occur during the
carrier event. This count does not increment if a collision is present.