Cabletron Systems EMM-E6 - Manual (Page 56)

Alarm Configuration
3-6 Setting Module and Port Alarms
Setting Module and Port Alarms
The following sections describe procedures for setting module and port alarm
limits. Module-level alarms are based on the combined traffic within a particular
module, while port-level alarms are based on an individual port.
Setting Module Alarms
1. In the Alarms window, click mouse button 1 on a repeater selection in the
scroll list.
2. Click mouse button 1 on to open the Set Module Alarms
window.
NOTE
The Timebase applies to all enabled alarms, port-level and module-level alarms as well as
repeater-level alarms. The Timebase appears in each alarms window — repeater, module,
and port — but you can only edit it in the Repeater Alarms window.
Since alarm condition samples are taken at the end of the defined timebase interval, alarm
conditions which occur over the span of two timebase intervals will not be detected even if
the threshold is crossed within the defined timebase. For example, if the timebase is set to
10 seconds and the broadcast alarm threshold is set to 20, 20 or more broadcast packets
may be detected in the last 5 seconds of one time interval and the first five seconds of the
subsequent interval (for a total time interval of 10 seconds), but no alarm will be triggered
because the broadcasts occurred within two different timebase intervals. The shorter the
timebase, the more likely this condition is to occur.