OpenNMS components that use filters
Notification rules control whether a received event triggers a notification.
Each event is tested against the rules in notifications.xml looking for a match.
When a match is found, the corresponding notification is sent.
The default for most notifications is
IPADDR IPLIKE ...; however, you may use any valid rule.
For an exclusive filter, use
!(IPADDR IPLIKE 169.254..).
This allows you to be very granular when defining what to alert on.
The webUI uses filters to validate rules when configuring notifications. This ensures that the rule will be syntactically correct, and allows the administrator to preview the list of matching interfaces before finalizing the notification.
You can also use filters with rules to configure path outages to select a list of nodes that lie behind the specified outage path. You can preview this list before finalizing the configuration.