Hurricane Electric tunnel fallback with 2 Internet WANs

[Boab]

I use HE for IPv6 provision. When one of the WANs fails IPv4 traffic automatically switches to the other WAN, I would like to do the same for IPv6 traffic. I know how to make HE change its IPv4 to point to my other WAN.
However I cannot see how to configure pfSense. The GIF interface for HE is tied to a Specific Interface. Is there a way to make it float between the 2 WANs?

[Gertjan]

Good question.

I was able to crate a second GIF interface, using exactly the same settings as the first one - interface "WAN" included. You will be using "WAN2".
I could assign an interface for this GIF interface.
I could declare it as a possible IPv6 gateway.

I stopped here.
I couldn't test more : I don't have a double WAN.

As you stated already, the opposite "tunnel.he.net" IPv4 tunnel end will refuse to talk to our 'other' WAN IPv4, you have to switch over using the DDNS facilities.

[Boab]

Tried adding the second GIF, it brought the HE link down. The Gateway status only showed one HE.
Removed the extra GIF to restore normal operation.
Thanks