Setting the RMON AlarmTo set an alarm on any MIB object, use the rmon alarm or rmon hc-alarm command in GLOBAL CONFIGURATION mode.• Set an alarm on any MIB object.CONFIGURATION mode[no] rmon alarm number variable interval {delta | absolute} rising-threshold [value event-number] falling-threshold value event-number [owner string]OR[no] rmon hc-alarm number variable interval {delta | absolute} rising-threshold value event-number falling-threshold value event-number [owner string]Configure the alarm using the following optional parameters:• number: alarm number, an integer from 1 to 65,535, the value must be unique in the RMON Alarm Table.• variable: the MIB object to monitor — the variable must be in SNMP OID format; for example, 1.3.6.1.2.1.1.3. The object typemust be a 32-bit integer for the rmon alarm command and 64 bits for the rmon hc-alarm command.• interval: time in seconds the alarm monitors the MIB variable, the value must be between 1 to 3,600.• delta: tests the change between MIB variables, this option is the alarmSampleType in the RMON Alarm table.• absolute: tests each MIB variable directly, this option is the alarmSampleType in the RMON Alarm table.• rising-threshold value: value at which the rising-threshold alarm is triggered or reset. For the rmon alarm command,this setting is a 32-bits value, for the rmon hc-alarm command, this setting is a 64-bits value.• event-number: event number to trigger when the rising threshold exceeds its limit. This value is identical to thealarmRisingEventIndex in the alarmTable of the RMON MIB. If there is no corresponding rising-threshold event, the value should bezero.• falling-threshold value: value at which the falling-threshold alarm is triggered or reset. For the rmon alarm command,this setting is a 32-bits value, for the rmon hc-alarm command this setting is a 64 bits value.• event-number: event number to trigger when the falling threshold exceeds its limit. This value is identical to thealarmFallingEventIndex in the alarmTable of the RMON MIB. If there is no corresponding falling-threshold event, the value should bezero.• owner string: (Optional) specifies an owner for the alarm, this setting is the alarmOwner object in the alarmTable of the RMONMIB. Default is a null-terminated string.Example of the rmon alarm CommandTo disable the alarm, use the no form of the command.The following example configures RMON alarm number 10. The alarm monitors the MIB variable 1.3.6.1.2.1.2.2.1.20.1 (ifEntry.ifOutErrors)once every 20 seconds until the alarm is disabled, and checks the rise or fall of the variable. The alarm is triggered when the1.3.6.1.2.1.2.2.1.20.1 value shows a MIB counter increase of 15 or more (such as from 100000 to 100015). The alarm then triggers eventnumber 1, which is configured with the RMON event command. Possible events include a log entry or an SNMP trap. If the1.3.6.1.2.1.2.2.1.20.1 value changes to 0 (falling-threshold 0), the alarm is reset and can be triggered again.Dell(conf)#rmon alarm 10 1.3.6.1.2.1.2.2.1.20.1 20 delta rising-threshold15 1 falling-threshold 0 1 owner nms1Configuring an RMON EventTo add an event in the RMON event table, use the rmon event command in GLOBAL CONFIGURATION mode.• Add an event in the RMON event table.Remote Monitoring (RMON) 741
