Gigabit Ethernet Switch User’s Guide
Web-Based Network Management
99
♦
CRC + Alignment
Counts otherwise valid frames that
did not end on a byte (octet) boundary.
♦
Late Collision
Counts collisions that occur at or after
the 64
th
byte (octet) in the frame. This may indicate that
delays on your Ethernet are too long, and you have either
exceeded the repeater count or cable length specified in
the Ethernet standard.
♦
MAC Received Error
Counts bit patterns with illegal
encodings. This may indicate noise on the line.
♦
Oversize Frames
Counts packets received that were
longer than 1518 octets (excluding framing bits, but
including FCS octets) and were otherwise well formed.
♦
Received Bad Fragments
The number of good frames
with length less than the 64-byte (octet) minimum defined
by the Ethernet standard. These are usually caused by
collisions.
♦
Total Errors
The sum of the CRC + Alignment, Late
Collision, MAC Received Error, Oversize Frames, and
Received Bad Fragments counters.
♦
Collisions
The best estimate of the total number of
collisions on this Ethernet segment.