3-1Chapter 3Alarm ConfigurationAccessing the Basic and Advanced Alarms windows; creating a basic alarm; creating an advancedalarm; creating events; assigning actions to events; viewing the event logThrough the RMON Alarm and Event functionality supported by yourSmartSwitch 2000, you can configure alarms and events (and, where appropriate,actions) for each available interface.About RMON Alarms and EventsAlthough Alarms and Events are defined as separate RMON groups, neither onecan function properly without the other: you can define an alarm threshold, but ifit doesn’t point to an event, there will be no indication that the threshold has beencrossed; similarly, you can define an event, but unless it is attached to an alarmthreshold, it won’t be triggered. Each is an essential part of the same notificationprocess: the alarm defines a set of conditions you want to know about, and theevent determines the means of letting you know those conditions have occurred.Events are also an integral part of the filter and packet capture functionality: youcan start and stop packet capturing in response to events, or a successful packetcapture can generate its own event.SPECTRUM Element Manager provides two means for configuring RMONalarms: using the Basic Alarms window, you can define both rising and fallingalarm thresholds for up to three pre-selected MIB-II variables per interface; basedon the options you select, the application automatically creates the necessaryevents (to log alarm occurrences, generate a trap, or both) and — for Cabletrondevices which support the Actions MIB — adds the requested actions to thoseevents (to enable or disable bridging at the selected interface).TIPThe Alarm, Event, and Actions windows described in this chapter are identical to thoseprovided via the RMON utility. For more information about other features of RMON, seethe RMON User’s Guide included with your software.
