What is the alarm purge algorithm?

Overview

Because a large number of outstanding alarms can affect system performance, the NFM-P purges outstanding alarms. The alarm purge algorithm sorts alarms using the following criteria:

Note: The alarm purge algorithm is not applied to the following correlating—or root cause—alarms unless the red threshold has been crossed:

When an alarm policy does not exist, the NFM-P purges alarms as follows:

For collocated systems:

For distributed systems:

To ensure that purged alarms are logged, you must enable alarm history logging. See How do I configure alarm history logging? for information about configuring alarm history logging and purging policies.