3Com LINKBUILDER 3C18500, User Manual

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T H E R N E T
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T A T I S T I C S
This appendix lists the terms that are used in the Repeater Statistics,
Module Statistics and Port Statistics screens. There are suggestions for
courses of action to take, if required. In general, if repeater statistics
indicate a problem, try to isolate the source of the problem by
examining module and then port statistics.
Alignment Errors . An alignment error occurs if the last byte of the
frame is not received whole. The number of alignment errors should
be a very small percentage of the total data traffic.
Alignment errors are likely to be caused by a fault at the
transmitting device. Try to isolate the cause by looking at the
module and/or port statistics to locate the source of the errors.
Check the transceiver or adapter card of the device connected to
the problem port. If the card appears to be operating correctly,
check the cable and cable connections for breaks or damage.
Auto Partitions . The number of times the port or ports have
automatically partitioned. Autopartitioning occurs when excessive
(more than 64) consecutive collisions occur at a port.
Autopartitioned ports are automatically reconnected when the
fault is rectified. Frequent partitions can indicate that there is a
problem in the cabling between two repeaters, modules or ports, or
one of these and an attached device. It can also indicate that a
device is faulty. Check the cabling at both the stack and the devices
connected to it.
Bandwidth Used (%). The percentage bandwidth used. This statistic
gives an indication of the general traffic level of the network.
Broadcast Frames . The total number of broadcast frames seen at the
repeater, module or port. Broadcast frames are frames that are