Gigabit Ethernet Switch User’s Guide
64
Figure 6-54. Port Error Packet Statistics screen
The information displayed above includes:
♦
Ports
This field always displays either “
1 to 4”
or
“5 to 8”
in this 8-port switch version.
♦
Polling Interval
Select the desired update increment setting from:
1 sec
,
5 sec
,
15 sec
,
30 sec
,
1 min
, or
Suspend
.
♦
CRC Errors
The number of frames that fail the CRC integrity check.
♦
Oversize Frames
The number of good frames with length greater than 1518 bytes and therefore are
greater than the maximum legal length.
♦
Fragments
The number of packets less than 64 bytes with either bad framing or an invalid CRC.
These are normally the result of collisions.
♦
Jabbers
The number of frames with length more than 1518 bytes and with CRC error or misalignment
(bad framing).
♦
Late Collision
The number of collisions that occur at or after the 64
th
byte (octet) in the frame.
♦
Mac Rx Errors
The number of frames with received MAC Errors.
♦
Dropped Frames
Counts received packets which are dropped due to any of the following reasons: lack
of available receive buffers, port-disable, link-test-fail, spanning tree, or empty distribution list.
♦
Total errors
The sum of the CRC Errors, Oversize Frames, Fragments, Jabbers, Late Collision, Mac
Rx Errors, and Dropped Frames counters.
♦
Collisions
The number of collision errors.
Press CLEAR COUNTER to reset all statistic counters on this screen.
Port Packet Analysis Statistics
To access the fourth item on the
Traffic Statistics
menu, choose
Port
Packet
Analysis Statistics
. The
following table appears:
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