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 80 minutes if it is incrementing

 

at its maximum rate. Since that amount of time could be less

 

than management station's poll cycle time, in order to avoid a loss

 

of information, a management station is advised to poll the

 

dot3HCStatsFrameTooLongs 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.

 

 

Mac Rx Error Frames

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. 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 dot3HCStatsInternalMacReceiveErrors 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.

 

 

Duplex Status

The current mode of operation of the MAC entity.'unknown'

 

indicates that the current duplex mode could not be determined.

 

Management control of the duplex mode is accomplished thrugh

 

'duplexmode' in ethernet command. Note that this object provides

 

redundant information with etherActualDuplexMode

 

inetherIfTable.

 

 

IP DSLAM

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