Enterasys Networks 6000, Matrix E7 manual Broadcast Packets, Errors of Type

Managing Ethernet MicroLAN Modules

Packets

Use the text box in this field to determine the total number of packets (including all errors except collisions) that must be processed by the repeater, board, or port within the user-specified time before an alarm is triggered. Allowable values are 1 to Ý 4 billion

32

(2 -1).

Broadcast Packets

Use the text box in this field to determine the number of broadcast packets that must be processed by the repeater, board, or port within the user-specified time before an alarm

32

limit is reached. Allowable values are 1 to Ý 4 billion (2 -1).

% Errors of Type

Use the text box in this field to determine what percentage of packets received by the repeater, board, or port within the specified time interval can be errors of the selected type or types before an alarm is triggered. Allowable values are one to 100; percentages will be calculated based on the number of error packets of all types selected (all those with an check in their check box). Again, a repeater-level alarm will count all selected error types received by the repeater channel; a port-level alarm will count only selected error types received by the individual port. (Remember, on an Ethernet MicroLAN module, a board is equivalent to a repeater channel.)

You can select any combination of the following error types:

CRC Errors	If this check box is selected, all packets with Cyclical
	Redundancy Check (CRC) errors will be included in
	calculating the overall percentage of errors.
Framing Errors	If this check box is selected, all misaligned packets will be
	included in calculating the overall percentage of errors. A
	misaligned packet is one with a non-integral number of bytes;
	these are also sometimes referred to as alignment errors.
Runts	If this check box is selected, the number of runt packets will be
	included in calculating the overall percentage of errors. A runt
	packet is one that is less than the minimum Ethernet frame size
	of 64 bytes.
OOW Collisions	If this check box is selected, all collisions out of the standard
	collision window (51.2 μs) will be included in calculating the
	overall percentage of errors. Out-of-window collisions are
	typically caused by faulty network design.
Giants	If this check box is selected, the number of giant packets will
	be included in calculating the overall percentage of errors. A
	giant packet exceeds the maximum Ethernet frame size of 1518
	bytes (excluding the preamble).

Alarm Limits 5-21