cluster with 3 appliances

Hi A_Azeddine,

You can have a device group of 3 devices.

Its a good approach if you run multiple traffic groups in a active-active mode. In this case unit-1 can host traffic group 1, unit-2 can host traffic group 2 and unit-3 can be used as a failover device for either traffic group 1 or 2.

if yes, what are the requirements?

You have to use the same plattform as well as same TMOS version and you have to use Network based failover (the serial-cable won't work for 3 units).

Cheers, Kai