Hello,
VLAN failsafe allow to monitor certain aspects of the system or network.
This functionnality can detect a problem with a VLAN (Monitors traffic on a VLAN), and take some action, such as restarting the service or failover. The default action is Reboot.
What I now, when a device encounter a Networ problem (On a monitoring VLAN), the system initiate failover and switch control to the standby device regardless of the other equipment.
that means that we can potially have the 2 standby equipment (I already had this problem).
To solve this problem, I gave up vlan failsafe an I used HA group (that are more flexible and smart). You can create a pool with your GW and create a transparent monitor. then Put a different Weight on both device... That allow you to failover when a vlan fail but always have an active memenber.
Hope that it's clear for your.
Regards,