Enterasys Networks 2000 Basic Alarm Configuration

Alarm Configuration

Using the Advanced Alarms feature, you can define custom alarms for almost any

MIB-II or RMON object, as long as it is present in the device firmware and its

value is defined as an integer (including counters, timeticks, and gauges). All

aspects of these alarms are user-selectable: thresholds can be established on either

the absolute or delta value for a variable; events can be configured to create a log,

generate a trap, or both; and for Enterasys devices that support the Actions MIB,

events can also be configured to perform any defined SNMP SET or series of SETs

on device objects. The Advanced Alarms feature also allows you to configure any

events you wish to use in conjunction with the Packet Capture functionality. (For

more information on using the Packet Capture feature, see the RMON User’s

Guide included with your software.)

The Basic Alarms feature allows you to assign alarms to any interface type; using

the Advanced Alarms feature, you need only be sure to select variables

appropriate to the interface — Ethernet for Ethernet, Token Ring for Token Ring,

etc. — when defining your alarms.

Basic Alarm Configuration

Using the Basic Alarm Configuration application, you can define both rising and

falling alarm thresholds for three selected MIB-II objects: ifInOctets, ifInNUcast,

and ifInErrors. Because these pre-selected objects are not RMON-specific, you can

configure alarms for all interfaces installed in your SmartSwitch 2000 — including

those, like FDDI, for which no specific RMON statistics currently exist.

In addition to configuring separate rising and falling thresholds, you can also

configure your device’s response to an alarm condition: when a threshold is

crossed, the RMON device can create a log of alarm events, send a trap notifying

your management workstation that an alarm condition has occurred, or both; you

can even configure an alarm to enable or disable bridging on the offending port in

response to a rising or falling alarm condition.

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You can use the RMON Alarms feature to configure alarms for MIB objects on FDDI,

ATM, and other interfaces that don’t specifically support RMON: the Basic Alarms

window provides MIB II objects as alarm variables; Advanced Alarm configuration allows

you to select any object as an alarm variable, as long as its value is defined as an integer

and you assign the correct instance value. See step 5 on page3-18 and the Note which

follows it for more information on assigning the correct instance value to an advanced

alarm.

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The Basic Alarm Configuration window combines the three parts of creating a working

alarm — configuring the alarm itself, configuring an event that will announce the

occurrence of an alarm (including assigning any actions), and linking the two — into a

single step, and handles the details transparently. For more information about the

individual steps involved in creating an alarm, see Advanced Alarm Configuration, on

page3-10.