VLAN Failsafe and the failover between the units are 2 separate events. VLAN Failsafe causes the failover to take place by creating the condition which failover is initiated. VLAN failsafe in itself does not include a feature to "tell" the standby unit to become active.
1. VLAN Failsafe kicks in due to lack of traffic.
2. VLAN failsafe causes reboot/restart/failover (This is where VLAN Failsafe is done)
3. heartbeat message being sent on TCP 1028 from the Active unit stops due to action No. 2 above
4. Standby unit becomes active.