4 System Management Functions
Last update PvD

4 SMF
Event Report Management Function

Recommendation X.734.

Overview

1. Event Reporting Management Function
2. Event Forwarding Discriminator

Event Reporting Management Function

X.734 Event Reporting Management allows an open system to establish and control the discrimination and the forwarding of event reports to other open systems.  Event reports are generated as a result of the notification that an event has occurred, e.g. a threshold violation or a change in configuration status (see CMIP Event Reports).
The event forwarding management function provides the capability of identifying the destinations to which selected event reports are to be sent.

Event reporting management comprises the following:

• initiation of event forwarding {i.e. create a discriminator}
• termination of event forwarding
• suspension of event forwarding
• resumption of event forwarding
• modification of event forwarding conditions
• retrieval of event forwarding conditions

Event Forwarding Discriminator (EFD)

The Event Forwarding Discriminator is a Managed Object to match specified conditions in a CMIP event report, and forward that to the specified destination.  For that purpose, the Event Forwarding Discriminator (EFD) object (super)class is introduced.  The discriminator may be specialised into subclasses to support the control of various system management functions (e.g. Alarm reporting functions).

The conditions specified by the discriminator are:

• identification of a scheduling packages that determine when the discriminator processing will occur;
• the criteria for discrimination;
• the administrative and operational state of the discriminator;
• those specific to a particular discriminator object subclass.

 

Event Reporting management model (and relationship with Log management)
 

So the characteristics of a discriminator are:

• State Management (see SMF):  Each discriminator has
  • Operational state:  enabled or disabled;
  • Administrative state:  locked or unlocked {no shutting down; no Usage states}.
• Schedule (see SMF);
  • Availability status:  potentially off-duty;
  • Duration:  start time and stop time;
  • Scheduling:  daily, weekly and/or external scheduling;
• Discriminator notifications:  to be issued on state change, attribute value change, object creation and object deletion.
• Criteria:  a logical expression using values (MAPDU) from the Potential event report:  MO class, MO instance, event type, event specific attributes (which can be specific for the type of the event report, such as severity, backed-up status, probable cause for alarms.  Hence the specifity in discriminator object subclass).
• Destination to which event reports which fulfill the selection criteria will be sent.  The destination may be a single application entity title or multiple entity titles.

To be active, the discriminator must be in the enabled and unlocked state, and not scheduled off-duty.

See also (System Management Function) Alarm reporting function as that is a clear example of an Event Report Forwarding function.

Next section: Alarm reporting function
Up to Contents
Up to Index

=O=