Extreme Networks EPICenter 6.0, Справочное руководство

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Configuring a New Rule or Modifying a Rule
EPICenter Reference Guide
133
Configuring an RMON Rule
If you select RMON Event as the Configuration Type, the fields and buttons in this window are defined
as follows:
Name The name for this rule.
MIB Variable The MIB variable that the rule monitors. Type in the complete OID in its numeric form, or click
the Look Up... button to bring up a list of variables that are available.
• Type the beginning of a variable name into the MIB Variable field, then type a space, and
the Alarm System attempts to match your typing to the variable list and auto-complete your
entry.
MIB variables that apply to the entire device have the suffix “.0” appended to them to create
the complete OID. MIB variables that apply per port are combined with the port ifIndex to
generate the OID.
If the MIB variable you want to monitor does not appear in the MIB Variable lookup list, you
can still use the variable by typing its complete OID. Enter the OID in its numeric form, ending
in .0 if it is a per device variable, or in the specific index if it is a per-port variable. If it is a
table variable, you may need to enter each index and apply it to each target device one by one.
Look Up... Click this to display a list of the MIB variables that may be used in an RMON rule. The list is
organized by MIB group. Within the MIB variable list:
• Click on a variable group to display the individual variables within the group.
• Use the up and down arrow keys to scroll the list.
Note: The MIB variable list displays only the MIBs that were shipped with the EPICenter
software, and indexed by ifIndex. It does not display table variables in tables indexed by an
index other than (or in addition to) ifIndex.
Description The description of the MIB variable. This description should specify the units of measure for the
variable, needed in order to correctly specify the Rising Threshold and Falling Threshold values.
Rising Threshold A threshold value that triggers an event when the value of the variable increments past this
value. An event is generated when the sample value meets the following conditions:
• When the sample value becomes greater than or equal to the Rising Threshold for the first
time after the alarm is enabled, if the Startup Alarm condition is set to Rising or
RisingOrFalling
• The first time the sample value becomes greater than or equal to the Rising Threshold, after
having become less than or equal to the Falling Threshold
Falling Threshold A threshold value that triggers an event when the value of the variable decreases past this
value. An event is generated when the sample value meets the following conditions:
• When the sample value becomes less than or equal to the Falling Threshold for the first time
after the alarm is enabled, if the Startup Alarm condition is set to Falling or RisingOrFalling
• The first time the sample value becomes less than or equal to the Falling Threshold, after
having become greater than or equal to the Rising Threshold
Sample Type The method used to compare the variable to the threshold. Specify the type as follows:
• Absolute to use the actual sample value of the variable
• Delta to calculate the difference between the current sample value and the previous sample
value of the variable, and use the difference in the comparison