Zabbix periodically scans the IP ranges defined in network discovery rules. Frequency of the check is configurable for each rule individually. Once a host or a service is discovered, a discovery event (or several events) are generated.
Zabbix generates the following events:
|Service Up||Every time Zabbix detects active service.|
|Service Down||Every time Zabbix cannot detect service.|
|Host Up||If at least one of the services is UP for the IP.|
|Host Down||If all services are not responding.|
|Service Discovered||If the service is back after downtime or discovered for the first time.|
|Service Lost||If the service is lost after being up.|
|Host Discovered||If host is back after downtime or discovered for the first time.|
|Host Lost||If host is lost after being up.|
Active agent autoregistration creates events in Zabbix.
If configured, active agent autoregistration event is created when a previously unknown active agent asks for checks or if the host metadata has changed. The server adds a new auto-registered host, using the received IP address and port of the agent.
For more information, see the active agent autoregistration page.
Internal events happen when:
Internal events are supported since Zabbix 2.2. The aim of introducing internal events is to allow users to be notified when any internal event takes place, for example, an item becomes unsupported and stops gathering data.
Internal events are only created when internal actions for these events are enabled. To stop generation of internal events (for example, for items becoming unsupported), disable all actions for internal events in Configuration → Actions → Internal actions.