Planet Technology IP DSLAM IDL-4801 - Manual (Page 316)

IDL series User Guide 316
re-initialization of the management system, and at other times as
indicated by the value of ifCounterDiscontinuityTime.
Excess Collisions
Frames
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.
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.
Mac Tx Errors Frames 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. 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 dot3HCStatsInternalMacTransmitErrors 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.
Carrier Sense Errors 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. 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.
Too Long Frames A count of frames received on a particular interface that exceed
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