RG210-700/u-verse/pfSense/IPv6 configuration multiple interfaces

Guys,

I'm running a 100Mb dry copper with a RG210-700 and five static IPs. Behind of it I use a pfSense firewall, that handles all the internet traffic.

That pfSense has four interfaces:

- WAN

- LAN

- OPT1

- OPTs

The WAN has all five static IPs; the LAN a 10.10.10.0/24, OPT1 10.10.88.0/24, and OPT2 10.10.99.0/24.

Up to this point all IPv4.

Configured my WAN to DHCP6 and the LAN to track WAN, all works fine. The WAN get XXXX:XXXX:XXXX1:2d80:XXXX:XXXX:XXXX:XXXX/64 and the LAN XXXX:XXXX:XXXX:2d8f:XXXX:XXXX:XXXX/64.

It seems I'm getting 16 /64 subnets.

When creating VMs and connecting their WANs to the RG, I get the same subnet on them, as the baremetal above. The LAN interfaces, got IPv6s from other subnets, but all inside the 2d8 /60 range.

When trying to change the prefix delegation on the WAN side to /60, and track all LAN interfaces to it, the RG won't provide any subnet and all LAN interfaces won't get an IPv6, so tracking can only be used for one LAN interface with the /64 received.

With that said, does anyone know how to statically configure multiple LAN interfaces with IPv6 , considering that the designation received is /64 on the WAN and the first LAN interface is tracking WAN?

Thanks in advance for your thoughts.