CANOGA PERKINS 9145E NID Software Version 3.0 - Manual (Page 81)

Port Information 9145E NID Software User’s Manual
Layer 2 Statistics
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5.3.1 Layer 2 Counter Definitions
The following are definitions of the counters encountered on the Layer 2 Error Statistics screen
(Figure 5-15) and Layer 2 Frame Type Statistics screens (Figure 5-16).
5.3.1.1 Layer 2 Statistics
Frames Sent - reports the total number of frames sent from the interface since the last
reset (Raw) or the last counter reset (Current).
Frames Rcvd - reports the total number of valid frames received on the interface since
the last reset (Raw) or the last counter reset (Current).
Bytes Sent - reports the total number of bytes transmitted from the interface since the
last reset (Raw) or the last counter reset (Current).
Bytes Rcvd - reports the total number of valid bytes received on the interface since the
last reset (Raw) or the last counter reset (Current).
Frames > 1518 - reports the number of frames received on the interface that had a length
(excluding framing bits, but including the CRC) of 1519 or higher.
Frames > Limit - reports the number of frames received on the interface that had a
length that exceeded the user-defined Frame Size.
Line Rate Utilization - This is the percent utilization of the Ethernet segment on a scale
of 0 to 100 percent.
5.3.1.2 Layer 2 Error Statistics Screen
Frames Sent - reports the total number of frames sent from the interface since the last
reset (Raw) or the last counter reset (Current).
Frames Rcvd - reports the total number of valid frames received on the interface since
the last reset (Raw) or the last counter reset (Current).
Collisions - reports the number of collisions that the interface encountered when
attempting to transmit a frame over a half duplex connection.
Late Collisions - reports the number of collisions that the interface encountered later
than 512 bit-times into the frame when attempting to transmit a frame over a half duplex
connection.
Alignment Errors - reports the number of frames received on the interface that had a
non-integral number of octets and a bad CRC. The interface will discard the frame.
Undersize < 64 - reports the number of frames received on the interface that were less
than 64 bytes in length (excluding framing bits, but including the CRC), and were
otherwise well formed. The interface will discard the frame.
Oversize > MaxFrameSize- reports the number of frames received on the interface that
had a length (excluding framing bits, but including the CRC) greater than the Maximum
Frame Size set for the unit, inclusive.
See the Functional Configuration screen for information on how to set the Maximum
Frame Size. The interface will discard the frame.
Fragments - reports the number of frames received on the interface that were not an
integral number of bytes in length or that had a bad CRC, and were less than 64 bytes in
length (excluding framing bits but including the CRC). The interface will discard the frame.
CRC Errors - reports the number of frames received on the interface that had a length
(excluding framing bits, but including the CRC) of between 64 and the Maximum Frame
Size, inclusive, but had a bad CRC. The interface will discard the frame.