I'm currently trying to build a HA setup using Pfsense/CARP for the first time but i have a few questions about it.
On the LAN side i have 3 VLAN's and they failover fine using CARP, the problem is that i want WAN redundancy also. If the WAN link goes down, it won't failover and the primary instance becomes a sort of black hole. According to the Pfsense manual i need to set a VIP for the WAN interfaces but in my topology they are not in the same subnet.
How does this work if the public IP's are not on the same subnet, is this even possible?: