Enterasys Networks 2000 User Manual
Page 97
Basic Alarm Configuration
3-5
Alarm Configuration
Log/Trap
Indicates whether or not each alarm has been configured to create a silent log of
event occurrences and the alarms that triggered them, and whether or not each
alarm has been configured to issue a trap in response to a rising or falling alarm
condition. Possible values are log, trap, log&trap, or none.
Polling Interval
Displays the amount of time, in days, hours, minutes, and seconds, over which
the selected alarm variable will be sampled. At the end of the interval, the sample
value will be compared to both the rising and falling thresholds (described
below). You can set any interval up to 24,855 days.
Rising Threshold
Displays the high threshold value set for the selected alarm variable. Values used
to compare to the thresholds are relative, or delta values (the difference between
the value counted at the end of the current interval and the value counted at the
end of the previous interval); be sure to set your thresholds accordingly.
Rising Action
Indicates whether or not a rising alarm occurrence will initiate any actions in
response to the alarm condition: Enable if bridging will be enabled at the selected
interface in response to a rising alarm, Disable if bridging will be disabled at the
selected interface in response to a rising alarm, and None if no actions have been
configured for the selected alarm. Note that the Action fields will be unavailable
for devices configured to operate in SecureFast switching mode.
Falling Threshold
Displays the low threshold value set for the selected alarm variable. Values used
to compare to the thresholds are relative, or delta values (the difference between
the value counted at the end of the current interval and the value counted at the
end of the previous interval); be sure to set your thresholds accordingly.
Falling Action
Indicates whether or not a falling alarm occurrence will initiate any actions in
response to the alarm condition: Enable if bridging will be enabled at the selected
interface in response to a falling alarm, Disable if bridging will be disabled in
response to a falling alarm, and None if no actions have been configured for the
selected alarm. Note that the Action fields will be unavailable for devices
configured to operate in SecureFast switching mode.
TIP
Before you decide whether or not to assign an action to a rising or falling alarm, it is
important to understand something about the hysteresis function built in to the RMON
alarm functionality. See
How Rising and Falling Thresholds Work
page 3-27
, for
more information.