User`s guide

Viewing Statistics 9 - 7
Ethernet Error Statistics
n Buffer Full Frames Lost: Number of frames lost due to a lack of
receiver buffer space in the unit.
n CRC Errors: Number of frames received with an invalid CRC.
n Collisions: Number of times a collision occurred while the frame
was being received. This would indicate a hardware problem with an
Ethernet node on the infrastructure.
n Frame Alignment Errors: Number of frames received whose size
in bits was not a multiple of 8. Occasionally, extra bits of data are
inadvertently attached to a transmitted packet causing a frame align-
ment error.
n Over-length Frames: Number of frames received that are longer
than the configured maximum packet size.
n Short Frames: Number of frames received that are shorter than the
allowed minimum packet size of 64 bytes.
n Overruns: Number of times the hardware receive FIFO overflow.
This should be a rare occurrence.
n Misses: The number of Ethernet packets that were lost due to a lack
of buffer space on the unit.
n Excessive Collisions: Number of times transmissions failed due to
excessive collisions. Usually indicates the frame had to be continu-
ously retried due to heavy traffic on the Ethernet infrastructure.
n Deferrals: Number of times frames had to wait before transmitting
due to activity on the cable.
ETHERNET ERROR STATISTICS
Cleared 19:36:31 ago
Receive Transmit
-------------------------------------- -------------------------------
Buffer full frames lost 0 Excessive collisions 0
CRC errors 0 Deferrals 273
Collisions 2 +2 Excessive deferrals 0
Frame alignment errors 0 No carrier sense present 0
Over-length frames 0 Carrier sense lost 0
Short frames 0 Out of window collisions 0
Overruns 0 Underruns 0
Misses 0 Bad length 0
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