3Com 1000 - Manual (Page 109)

Port Traffic Statistics 6-5
Fragments The total number of packets received
that were not an integral number of octets in length
or that had a bad Frame Check Sequence (FCS), and
were less than 64 octets in length (excluding fram-
ing bits, but including FCS octets).
Frames Forwarded The total number of frames
which were received by the port and forwarded to
their destination address.
Frames Filtered The total number of frames that
were filtered because the destination address was
on the same segment (port) as the source station.
Errors The total number of errors which have
occurred on this port. Errors can be one of the fol-
lowing:
■ CRC Alignment Errors
■ Short Events
■ Long Frames
■ Late Events
■ Jabbers
The value shown should be a very small proportion
of the total data traffic.
IFM Count The number of times Intelligent Flow
Management (IFM) has had to operate to minimize
packet loss.
Frame Size Analysis The number of frames of a
specified length as a percentage of the total number
of frames of between 64 and 1518 octets. This indi-
cates the composition of frames in the network.
The frame size ranges are:
■ 64 octets
■ 65–127 octets
■ 128–255 octets
■ 256–511 octets
■ 512–1023 octets
■ 1024–1518 octets
The composition of frames on your network may
help you to analyze the efficiency of your network
layer protocol.
CLEAR SCREEN COUNTERS Select this button to
set all counters shown on the screen to zero. It is
useful for trend analysis if you wish to see changes
in counters over a short period of time. This button
does not clear the counters on the device or affect
counters at the network management workstation.