RMON Groups 3,9 Alarms, Events
You can enter this window from:
1. Main Menu Bar (under "Monitor")
2. From some devices menu bar windows.
Information presented in the window:
Alarms Control Table (upper part). The table presents control entries for RMON Group 3 (Alarms).
Every entry contains threshold information , which describes an alarm that should be generated
, when threshold is crossed. This table may contain entries for several device interfaces , but may be empty as well (default ) . If this table is empty , it may mean:
a) RMON Group 3 is not supported for this device.
b) RMON Group 3 is supported but there are no control threshold entries. You may create a threshold entry for any interface by clicking on the Add button. The "Add RMON Group 3 ......" Window will be opened. You will be required to enter some information which describes the threshold information:
1. Sample Interval in seconds, e.g.: 10 sec or 1 sec.
2. Counter/MIB-variable. There are two ways of selecting a Counter/MIB-variable. You may select one of the IfTable (MIB-II) counters, e.g.: InErrors (Input Errors) using the combo-box in the bottom right corner. (See also Interfaces Statistics (per interface)HELPID_IFGRAPH for the counters explanation). Another way to set a MIB variable is provided via Get Variable from MIB button. Pressing this button will take you to the MibViewHELPID_MIBVIEW window which allows to select any MIB-variable.
3. Sample Type. Select the method of sampling: Absolute means that the threshold will be applied to the counter absolute value. Delta (or PerInterval) means that the threshold will be applied to the counter changes per sampling interval. (End_Value - Stat_Value) e.g.: Number of Input Errors per I0 sec. (Counter=inErrors, Interval=10 sec).
4. Rising Threshold: A single event will be generated after sampled value will be greater than or equal to this threshold. Next Rising event will be generated only after Falling Event (see below)
5. Falling Threshold: A single event will be generated after sampled value will be less than or equal to this threshold. Next Falling event will be generated only after Rising Event (see above).
6. Rising Event Index: The Index from the Events Table (see bellow), which corresponds to Rising Event.
7. Falling Event Index: The Index from the Events Table (see bellow), which corresponds to Falling Event.
8. StartUp:The start-up alarm, i.e., conditions for an alarm to be sent as a result of the first sample.
You may select from: Rising, Falling, Rising or Falling.
9. Owner String : just a string to Identify the entry owner (usually not important)
10. Desired interface(port) number could be set via vertical scroll bar in the upper right corner only
after Counter/MIB-variable has been set.
Press OK in the "Add RMON Group 3 ..." Window. If Create operation fails, it may mean that RMON Group 3 is not supported for this device (see a)) .
Important: In order to create an Alarm Control Entry, you must have at least one Event in the Events Table (see below). It is natural, because otherwise you would not be able to enter Rising Event Index and Falling Event Index .
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