Cabletron Systems 7000 manual Problems

Statistics

NOTE

If you reset your device, you must Þrst close, then re-open the Statistics window to refresh peak values.

Problems
CRC/Alignment	Indicates the number of packets processed by the
	network segment that had a non-integral number of
	bytes (alignment error) or a bad frame check sequence
	(Cyclic Redundancy Check, or CRC error).
Fragments	Indicates the number of packets processed by the
	network segment that were undersized (less than 64
	bytes in length; a runt packet) and had either a
	non-integral number of bytes (alignment error) or a bad
	frame check sequence (CRC error).
Jabbers	Indicates the number of packets processed by the
	network segment that were oversized (greater than 1518
	bytes; a giant packet) and had either a non-integral
	number of bytes (alignment error) or a bad frame check
	sequence (CRC error).
Collisions	Indicates the total number of receive (those the device
	detects while receiving a transmission) and transmit
	(those the device detects while transmitting) collisions
	detected on the network segment.
Undersized	Indicates the number of packets processed by the
	network segment that contained fewer than 64 bytes
	(runt packets) but were otherwise well-formed.
Oversized	Indicates the number of packets processed by the
	network segment that contained more than 1518 bytes
	(giant packets) but were otherwise well-formed.

In their default state, the percentages displayed to the right of the numerical values for these Þelds indicate what percentage of total packets transmitted on the network segment were of the noted type. If you select the% of Tot. Errors option by clicking the mouse button in the check box, the percentages will indicate what percentage of problem, or error, packets transmitted on the network segment were of the noted type; these percentages will add up to 100. (The% of Tot. Errors option is active if there is an X in the check box.) The pie chart in the center of the window provides a graphical view of the selected percentage breakdown; colors in the pie chart correspond to colors in the percentage display boxes. Values listed to the right of the pie chart indicate peak delta values recorded since the statistics screen was launched, and the date and time they occurred.

3-4 RMON Statistics