Carrier Sense Errors

: 18

Too Long Frames

: 19

Mac Rx Error Frames

: 20

Duplex Status

:

 

FullDuplex

 

 

 

 

Output field:

 

 

 

 

 

Field

Description

 

 

 

 

 

 

 

 

 

 

IfName

An index name that uniquely identifies an interface to an

 

 

 

 

ethernet-like medium.

 

 

 

 

 

 

 

 

 

Alignment Errors

A count of frames received on a particular interface that are not

 

 

 

 

an integral number of octets in length and do not pass the 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 LLC (or other MAC user). Received frames

 

 

 

 

for which multiple error conditions pertain are, according to the

 

 

 

 

conventions of IEEE 802.3 Layer Management, counted

 

 

 

 

exclusively according to the error status presented to the LLC.

 

 

 

 

This counter does not increment for group encoding schemes

 

 

 

 

greater than 4 bits per group. 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 dot3HCStatsAlignmentErrors 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.

 

 

 

 

 

 

 

 

FCS Errors

A count of frames received on a particular interface that are an

 

 

 

 

integral number of octets in length but do not pass the FCS

 

 

 

 

check. This count does not include frames received with

 

 

 

 

frame-too-long or frame-too-short error. 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 pertain are, according to the conventions of IEEE

 

 

 

802.3 Layer Management, counted exclusively according to the

 

 

 

 

error status presented to the LLC. 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

 

 

 

 

 

 

 

 

314

IDL series User Guide