OcNOS-RON : System Management Guide : System Management Configuration Guide : Fault Management System Configuration
Fault Management System Configuration
The Fault Management System (FMS) detects events, correlates them, and raises relevant alarms. The events are OPER_LOGs relayed from the vlogd module. The alarms are a result of the correlation rules and provide a persistent indication of the faults. The alarms are maintained in a database and can be displayed via show commands.
Note: FMS relies on the loopback interface (interface lo0) for communication with VLOGd. Therefore, ensuring the operational status of the loopback interface is vital for the normal functioning of both the FMS and VLOGd modules.
FMS applies the correlation procedures in Table 34-3 based on the configurations specified.
 
Table 34-3: FMS correlation procedures
Correlation type
Description
Generalization
• Groups two or more events into a single alarm.
• A generalized alarm will further use one of the correlation types (none, time-bound, counting and compression) for applying correlation logic to the new alarm.
Time-bound
• Stipulates that when the event is received, a timer is started for that event.
• While the timer is running, subsequent events of the same type are suppressed.
• On the expiry of the timer, an alarm will be raised for that event stating the count for the number of times that event was received in this duration.
Counting
Considers a specified number of similar events as one. In this correlation type, the respective alarm will be raised after the event has occurred for count times.
Compression
Check multiple occurrences of the same event for duplicate/redundant event information, remove the redundancies, and report them as a single alarm.
Severity
Correlates events based on the severity of the events.
Last modified date: 08/28/2023