Nortel Passport 8600 Configuring page 132

132 Chapter 4 Configuring and graphing ports
Table 29 Ethernet Errors tab fields (continued)
Field
CarrierSenseErrors
FrameTooLongs
SQETestErrors
DeferredTransmissions
SingleCollisionFrames
MultipleCollisionFrames
LateCollisions
314723-D Rev 01
Description
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.
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 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.
A count of times that the SQE TEST ERROR message is
generated by the PLS sublayer for a particular interface. The
SQE TEST ERROR message is defined in section 7.2.2.2.4
of ANSI/IEEE 802.3-1985 and its generation described in
section 7.2.4.6 of the same document.
A count of frames for which the first transmission attempt on
a particular interface is delayed because the medium is busy.
The count represented by an instance of this object does not
include frames involved in collisions.
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 either the
ifOutUcastPkts, ifOutMulticastPkts, or ifOutBroadcastPkts,
objects and is not counted by the corresponding instance
of the dot3StatsMultipleCollisionFrames object.
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,
objects and is not counted by the corresponding instance
of the dot3StatsSingleCollisionFrames object.
The number of times that a collision is detected on a
particular interface later than 512 bit-times into the
transmission of a packet; 512 corresponds to 51.2
microseconds on a 10 Mb/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.