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Chapter 4
Alarm Configuration
Accessing the Basic and Advanced Alarms windows; creating a basic alarm; creating an advanced
alarm; creating events; assigning actions to events; viewing the event log
Through the RMON Alarm and Event functionality supported by your
MultiSwitch 700 module, you can configure alarms and events (and, where
appropriate, actions) for each available interface.
About RMON Alarms and Events
Although Alarms and Events are defined as separate RMON groups, neither one
can function properly without the other: you can define an alarm threshold, but if
it doesn’t point to an event, there will be no indication that the threshold has been
crossed; similarly, you can define an event, but unless it is attached to an alarm
threshold, it won’t be triggered. Each is an essential part of the same notification
process: the alarm defines a set of conditions you want to know about, and the
event determines the means of letting you know those conditions have occurred.
Events are also an integral part of the filter and packet capture functionality: you
can start and stop packet capturing in response to events, or a successful packet
capture can generate its own event.
NetSight Element Manager provides two means for configuring RMON alarms:
using the Basic Alarms window, you can define both rising and falling alarm
thresholds for up to three pre-selected MIB-II variables per interface; based on the
options you select, the application automatically creates the necessary events (to
log alarm occurrences, generate a trap, or both) and — for devices which support
the Cabletron-proprietary Actions MIB — adds the requested actions to those
events (to enable or disable bridging at the selected interface).
TIP
The Alarm, Event, and Actions windows described in this chapter are identical to those
provided via the RMON utility. For more information about other features of RMON, see
the RMON User’s Guide.