Standby controller selection based on priority configuration

You can choose a standby controller by configuring a stack unit with the second highest priority or with the same priority as the active controller. If the two stack units have the same priority configured, the standby controller takes over when the active controller fails. If the original active controller becomes active again, it does not win back its active role, which helps to minimize traffic interruption on the stack. However, if the original active controller has the higher priority and hitless failover is enabled, the active controller regains its role without resetting other stack units. If hitless failover is disabled, the active controller resets the other stack units after it regains control.