Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 776

Setting the RMON Alarm To 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 eventnumber] falling-threshold value event-number [owner string] OR [no] rmon hc-alarm number variable interval {delta | absolute} rising-threshold value eventnumber 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 type must 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 the alarmRisingEventIndex in the alarmTable of the RMON MIB. If there is no corresponding rising-threshold event, the value should be zero. - 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 the alarmFallingEventIndex in the alarmTable of the RMON MIB. If there is no corresponding falling-threshold event, the value should be zero. - owner string: (Optional) specifies an owner for the alarm, this setting is the alarmOwner object in the alarmTable of the RMON MIB. Default is a null-terminated string. Example of the rmon alarm Command To 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 the 1.3.6.1.2.1.2.2.1.20.1 value shows a MIB counter increase of 15 or more (such as from 100000 to 100015). The alarm then triggers event number 1, which is configured with the RMON event command. Possible events include a log entry or an SNMP trap. If the 1.3.6.1.2.1.2.2.1.20.1 value changes to 0 (falling-threshold 0), the alarm is reset and can be triggered again. DellEMC(conf)#rmon alarm 10 1.3.6.1.2.1.2.2.1.20.1 20 delta rising-threshold 15 1 falling-threshold 0 1 owner nms1 Configuring an RMON Event To 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. 776 Remote Monitoring (RMON)