This section describes HA events.

HA Event

Description
HA_GOING_ACTIVE A standby SD-WAN Edge is taking over as Active because it has not heard a heartbeat from the peer.
HA_STANDBY_ACTIVATED When a new Standby is detected by the Active, the Active tries to activate the Edge by sending this event to the SASE Orchestrator. On a successful response, the Active will sync the configurations and sync data.
HA_FAILED Typically happens after the HA pair has formed and the Active SD-WAN Edge no longer hears from the Standby SD-WAN Edge. For example, if the Standby SD-WAN Edge reboots, you will receive this message.
HA_READY Means the Active SD-WAN Edge now hears from the Standby SD-WAN Edge. Once the Standby SD-WAN Edge comes back up and reestablishes the heartbeat, then you will receive this message.
HA_TERMINATED When the HA configuration is deactivated, and it is successfully applied on the Edges, this Event is generated.
HA_ACTIVATION_FAILURE If the SASE Orchestrator is unable to verify the HA activation, it will generate this Event. Examples include:
  • the SASE Orchestrator is unable to generate a certificate
  • the HA has been deactivated (rare)
VCO_IDENTIFIED_HA_FAILOVER Event message reads: Edge HA Failover Detected

The SASE Orchestrator has detected that a High Availability failover has occurred on the Edge.

VCO_IDENTIFIED_HA_FAILURE Event message reads: Edge HA Failure Detected

The SASE Orchestrator has detected that the Standby Edge has gone down. This event will include the serial number of the Edge.

HA_UPDATE_FAILOVER_TIME Event message reads: Updating HA Failover time from ####ms to ####ms

A user changed the failover time for when an HA Edge will failover based on how long the Edge will wait to receive a heartbeat from the Active Edge. Increasing this value can prevent an Active-Active "Split Brain" state for HA Edges under high load. This is done through the HA Failover Detection Time Multiplier located at Configure > Edge > Device > High Availability on the Orchestrator.

HA_RESET_FAILOVER_TIME Event message reads: Updating HA Failover time from ####ms to ####ms

When an HA Edge's system has been stable for 60 seconds, the process reduces the failover threshold time by 50%.