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24-port NWay Ethernet Switch User’s Guide
Web-Based Network Management 131
♦ 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 data errors detectable as 10BASE-TX “symbol errors,” bit patterns with illegal
encodings. This may indicate noise on the line.
♦ Dropped Frames The number of frames which are dropped by this port since the last Switch 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 Received
Error, Dropped Frames, and Undersize Frames counters.
♦ Collisions The best estimate of the total number of collisions on this Ethernet segment.
Packet Analysis
Figure 7-33. Port Packet Analysis window
The information is described as follows:
♦ Update Interval Choose the desired setting: 2 seconds, 5 seconds, 15 seconds, 30 seconds, 60 seconds or
Suspend.
♦ 64 The total number of packets (including bad packets) received that were 64 octets in length (excluding framing
bits but including FCS octets).