IPv6, dhcpv6-pd and VLANs

Hi all

I have a problem with IPv6 on a VLAN interface. Hopefully anyone can help me out here...

My setup in short:

- WAN: eth5.11 (pppoe 0)

- LAN: eth0

- LAN Wifi_Guest: eth0.201

All IPv6 config is working fine for clients on LAN (native VLAN). The clients on VLAN201 Wifi_Guest only receive an IPv4 address but no IPv6...

Here is my config:

ubnt@router# show interfaces
 ethernet eth0 {
     address 192.168.123.1/24
     description "Internal LAN"
     duplex auto
     speed auto
     vif 201 {
         address 192.168.201.1/24
         description "WiFi Guest"
     }
 }
 ethernet eth5 {
     duplex auto
     speed auto
     vif 11 {
         address dhcp
         description "to Provider"
         pppoe 0 {
             default-route auto
             dhcpv6-pd {
                 pd 0 {
                     interface eth0 {
                         host-address ::1
                         prefix-id :0
                         service slaac
                     }
                     interface eth0.201 {
                         host-address ::1
                         prefix-id :1
                         service slaac
                     }
                     prefix-length /48
                 }
                 prefix-only
                 rapid-commit enable
             }
             ipv6 {
                 dup-addr-detect-transmits 1
                 enable {
                 }
             }
             mtu 1492
             name-server auto
             password PASSWORD
             user-id USERNAME
         }
     }
 }

ubnt@router# run show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
       IA - OSPF inter area, E1 - OSPF external type 1,
       E2 - OSPF external type 2, N1 - OSPF NSSA external type 1,
       N2 - OSPF NSSA external type 2, B - BGP
Timers: Uptime
IP Route Table for VRF "default"
K      ::/0 [0/1024] via fe80::dab1:90ff:fe1e:c700, pppoe0, 00:44:22
C      ::1/128 via ::, lo, 00:49:14
C      2001:XXXX:YYYY::/64 via ::, eth0, 00:44:34
C      2001:XXXX:YYYY:1::/64 via ::, eth0.201, 00:44:34
C      fe80::/10 via ::, pppoe0, 00:45:42
C      fe80::/64 via ::, eth5.11, 00:46:07

If you need more information - let me know.

Any help would be greatly appreciated!