RMON Extension Alarm Group Management

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The RMON private alarm group is an extension of the RMON alarm group. It enables you to perform basic math operations on multiple variables and compare the calculation result with the rising and falling thresholds. Some vendors have developed their RMON private alarm groups. RMON extension alarm group supports not only alarm configuration for a single object, but also alarm configuration for the object expression. It supports not only interface configuration, but also configuration for any valid index instance value. Thus it is called extension alarm. With RMON extension alarm group management, you can add or delete an RMON extension alarm group, and view invalid RMON extension alarm groups.

Operation Procedure

Select the Resource tab.
Select the device to be managed from the device list to enter the detailed information page.
Click the RMON link in the Device Management list to open the RMON management page.
Click RMON Extension Alarm Group tab to enter into RMON Extension Alarm Group Management page.

Main Functions

Add RMON Extension Alarm Item
Delete RMON Extension Alarm Item
View Invalid RMON Extension Alarm Items

Parameters

Field	Description
Sampling Object Expression	Several formulas composed of OIDs and arithmetic expressions. Alarms are generated based on the operation result.
Stat Item	The statistics item and port description comprise the MIB variable to be monitored.
Port Desc	The statistics item and port description comprise the MIB variable to be monitored.
Alarm Sampling Type	Three sampling types are available, namely, absolute sampling, delta sampling and speed sampling. For the meaning of absolute sampling and delta sampling, refer to adding alarm item. Speed sampling refers to the delta sampling value per unit of time, that is, the delta sampling value divided by the sampling interval.
Alarm Startup Type	Three alarm startup types are available, namely, rising and falling alarm, rising alarm and falling alarm.
Interval	Specifies the interval for sampling. It is valid only when during is selected as the statistics type.
Stat. Type	Two statistics period types are available, namely, forever and during. If you select during, you need to specify the sampling interval.
Status	Two statuses are available, namely, Active and Inactive.