This article describes how FortiADC HA A-P mode failover is being triggered.
Scope
FortiADC v6.x, and v7.x.
Solution
The HA master election process only gets triggered after any of the following:
Monitor port up/down.
Remote IP failure.
Reboot/reload.
Note 1:
Override and node priority are only considered at the beginning of the primary election and changing it would not trigger failover, but it will be considered the next election.
Note 2:
Priority is optional. The smaller the number, the higher the priority. The default is 5. The valid range is 0 to 9.
Note 3:
By default, if the HA 'Override' feature is set to 'disable', the uptime will take precedence over the device priority setting during the HA master selection process. If the 'Override' feature is set to 'enabled' in the HA settings, the HA 'Priority' setting is considered first, before the uptime, when selecting the primary node.
