Planet Technology IP DSLAM IDL-4801 - Manual (Page 317)

IP DSLAM 317
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.