User guide

E-59
Cisco Media Gateway Manager 5.0 User Guide
OL-5461-02
Appendix E Real-Time Counters
RPM-ETHERNET-Line—Supported Real-Time Counters
All Versions Late Collisions dot3StatsLateCollisions The number of times that a collision is detected on a
particular interface later than 512 bit-times into the
transmission of a packet. Five hundred and twelve
bit-times corresponds to 51.2 microseconds on a 10
Mbit/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.
All Versions MAC Tramsnit
Errors
dot3StatsInternalMacTrans
mitErrors
A count of frames for which transmission on a
particular interface fails due to an internal MAC
sublayer transmit error. A frame is only counted by an
instance of this object if it is not counted by the
corresponding instance of either the
dot3StatsLateCollisions object, the
dot3StatsExcessiveCollisions object, or the
dot3StatsCarrierSenseErrors 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
transmission errors on a particular interface that are
not otherwise counted.
All Versions Carrier Sense
Errors
dot3StatsCarrierSenseError
s
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.
All Versions Giant Frames dot3StatsFrameTooLongs 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 obtain are, according to the conventions of
IEEE 802.3 Layer Management, counted exclusively
according to the error status presented to the LLC.
All Versions MAC Receive
Errors
dot3StatsInternalMacRecei
veErrors
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.
Table E-47 Category—Ethernet Counters (continued)
Applicability Counter Name MIB Object Name Description