We just upgraded from Sonicwall to a Cisco FirePower Firewall through the recommendation of our vendor. Is it true we need to purchase a full license for a fail-over unit? With Sonicwallo the secondary license covered the fail-over /standby unit since technically it is only used when the primary is not available. I just found out that I am being asked to purchase another 3k license for the standby unit. This seems really extreme $$$. Is there a reason for this?