Default event enrichment

The default set of topology information added to events includes information about whether this is a root cause event and the managed status of the entity on which the event occurred.

By default, events are enriched with the following topology information.

Table 1. Default set of topology information added to events
Field in ObjectServer alerts.status table	Description
NmosSerial	The serial number of a suppressing event. Note: The suppressing event is not necessarily a root cause event. There could be a chain of suppressing events from the perspective of the suppressed event.
NmosObjInst	An ID representing the device to which the event corresponds.
NmosCauseType	Indicates whether this is a root cause or symptom alert.
NmosDomainName	The name of the Network Manager domain that is managing the event. The Event Gateway sets this field value based on a topology lookup.
NmosEntityId	A unique numerical ID that identifies the Network Manager topology entity with which the event is associated. This column is similar to the NmosObjInst column, but is more granular. For example, the NmosEntityId value can represent the ID of an interface within a device.
NmosEventMap	Specifies the event map that is used to process the event. The event map defines how the RCA plugin processes the event. For example, you can configure which Event Gateway stitcher is called for which event map.
NmosManagedStatus	The managed status of the network entity for which the event was raised. Can apply to events from Network Manager and from any probe. You can use this column to filter out events from devices, interfaces, and other entities that are not considered relevant.