
654 Chapter 12 Configuring SNMP
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Existence monitors
Existence monitors check the condition of a monitored OID to see determine if it
is present, missing, or changed. Events are triggered if the result matches the
desired condition.
Figure 191
Add a Monitor: Existence
Fields used to add and configure an Existence monitor are listed in Table 140.
Table 140
Existence monitor fields (Sheet 1 of 2)
Field Description
Name Specifies the name of this monitor.
Monitor OID Specifies the OID value being monitored.
Condition Specifies the OID condition that will trigger an event. Must
be one of the following conditions:
•present
• missing
• changed
Trigger Event Specifies the event that is triggered if the condition matchs
for the specified OID.
Comment Specifies a comment for this monitor.
Frequency Specifies the sampling interval, in seconds. The default
value is 600.
Additional OIDs in Event Specifies any additional OIDs for this monitor to trigger.
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