Port Packet Analysis - D-Link DES-6000 User Manual

Modular Ethernet Switch User's Guide
♦ Clear button Clicking on this button resets all counters in the tables on this page to the value zero.
♦ Link Status Indicates the current link status.
Other errors:
♦ CRC Error Counts otherwise valid frames that did not end on a byte (octet) boundary.
♦ Oversize Frames Counts packets received that were longer than 1536 octets (excluding framing
bits, but including FCS octets) and were otherwise well formed.
♦ Fragments The number of packets less than 64 bytes with either bad framing or an invalid CRC.
These are normally the result of collisions.
♦ Jabber The number of frames with length more than 1536 bytes and with CRC error or
misalignment (bad framing).
♦ Late Collision Counts collisions that occur at or after the 64
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 Rx Error Counts data errors detectable as 100BASE-TX "symbol errors," bit patterns with
illegal encodings. This may indicate noise on the line.
♦ Dropped Frames
reboot.
♦ Undersize Frames The number of frames detected that are less than the minimum permitted
frame size of 64 bytes and have a good CRC. Undersize frames usually indicate collision fragments, a
normal network occurrence.
♦ Total Errors The sum of the CRC Error, Oversize Frames, Fragments, Jabber, Late Collision, MAC
Rx Error, Dropped Frames, and Undersize Frames counters.
♦ Collisions The total number of collisions on this Ethernet segment.

Port Packet Analysis

Web-Based Network Management
The number of frames which are dropped by this port since the last Switch
Figure 7-52. Port Packet Analysis window
byte (octet) in the frame. This may
th
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