Enterasys IRM2, Руководство пользователя

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Alarm Limits
5-6 Configuring Alarms
OOW Collisions If this check box is selected, all collisions out of
the standard collision window (51.2
µ
s) 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).
within:
This field displays the user-configurable alarm limit timer interval: the amount of
time the selected statistics will be counted before being compared to the
configured thresholds. The allowable values are 10 seconds to 23 hours/59
minutes/59 seconds.
Configuring Alarms
You configure alarms by choosing the alarm you wish to enable, setting the
threshold to the desired level, and selecting a time interval within which that
threshold must occur. You can base the alarms on:
• Number of collisions per good packet
• Number of total packets
• Number of broadcast packets
• Percentage of error packets
You can also configure board or port alarm limits so that the board or port will be
disabled when an alarm limit is reached.
Setting the Alarm Limits Time Interval
To set the time interval within which the defined alarm thresholds must be
reached in order to trigger an alarm:
1. Click on the clock next to the within: text box in any one of the alarm limits
windows; the interval you set applies to all configured alarms at all levels. The
Alarm Interval window,
Figure 5-4 , will appear.