DHCPv6 vergibt immer ipv6 mit Prefix 128 statt 64

[Realterminator]

Provider T-Com, bekome auf LAN DHCPv6 nicht zum korekten laufen

Interface-> WAN ->DHCPv6 client configuration
Configuration Mode: Basic
Request only an IPv6 prefix: An
Prefix delegation size: 56
Send IPv6 prefix hint: An
use IPv4 connectivity: An
Use VLAN priority: Disabled

Interface WAN
IPv6 link-local   fe80::2f4:21ff:fe68:6abe/64
IPv6 address   2003:xxxx:xxxx:2625:2f4:21ff:fe68:6abc/64
IPv6 delegated prefix   2003:xxxx:yyyy:1200::/56
IPv6 gateway   fe80::8aa2:5eff:fe1e:62d5

Interface-> WAN -> Generic configuration
IPv6 Configuration Type: Track Interface
IPv6 Interface: WAN
Pv6 Prefix ID: 0
Manual configuration: An

Interface LAN
IPv6 link-local   fe80::2f4:21ff:fe68:6abd/64
IPv6 address   2003:xxxx:yyyy:1200:2f4:21ff:fe68:6abd/64

Service -> Router Advertisements -> LAN
Router Advertisements: Managed     wenn ich hier Unmanaged  angebe läuft alles ohne DHCPv6 
Router Priority: Hight
ource Address: Automatic
Advertise Default Gateway: An
Advertise Routes: nichts angegeben
DNS servers: 2003:xxxx:yyyy:1200:2f4:21ff:fe68:6abd
Use the DNS settings of the DHCPv6 server: Aus
Do not send DNS settings to clients: Aus

SERVICES: DHCPV6: [LAN]
Enable: An
Subnet: 2003:xxxx:yyyy:1200::
Subnet mask: 64 bits
Current LAN IPv6 prefix: 2003:xxxx:yyyy:1200::
Available prefix delegation size: 57
Available range   2003:xxxx:yyyy:1200:: - 2003:xxxx:yyyy:1200:ffff:ffff:ffff:ffff
Range from ::1000 to ::2000
Prefix Delegation Range:  nichts angegeben


IP vom Linux Client:
2003:xxxx:yyyy:1200::2000/128

Wie bekomme ich eine ipv6 2003:xxxx:yyyy:1200::2000/64 hin?
Hoffe jemand von euch findet den meinen Fehler in der Config

[meschmesch]

Warum verwendest Du DHCPv6? Mach das mal aus.

##use IPv4 connectivity: An (? hatte ich immer aus).