IPV6 - CARP-Problem

[bitboy0]

I installed IPV6 with this document: https://doc.pfsense.org/index.php/Using_IPv6_on_2.1_with_a_Tunnel_Broker
But I have two PfSense as an carp-cluster and there is one Problem.

Normally I need to user the vIP defined for an interface instead the real ones. So the failover between the two boxes is working.

So I create the GIF-Interface, create a new Interface and assign the GIF there to get my new Gateway. I did this on both of the machines.

If I create the GIF-Interface I have to spezify the "parent-interface". This is the WAN of course. If I use the WAN-IF-vIP for the WAN there, the Gateway will not go online. If I give the real WAN-IF-adresse the interface is online. But If I give the real WAN-IF-adresse there, what should I spezifie at the second PfSense?

So at the moment the IPV6-Tunnel is only working at the first PfSense, but there is no failover if the second PfSense comes in.