Panasonic 470 User Manual

Page 61

Graphing port statistics

Field

Description

InternalMacReceiveErro
rs

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 can
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.

FrameTooLongs

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 occur are, according to
the conventions of IEEE 802.3 Layer Management,
counted exclusively according to the error status
presented to the LLC.

SQETestErrors

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 is
described in section 7.2.4.6 of the same document.

DeferredTransmissions

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.

Nortel Ethernet Switch 460/470

Configuration — System Monitoring

NN47210-503

01.01

Standard

3.7

22 February 2007

Nortel Networks Confidential