Hello everybody,

I trry to setup a VLAN with DHCPv6 with prefix delegation. There is a Fritz!Box router connected to the ER605 witch needs this kind of setup to provide IPv6 addresses to its clients. In my specific setup the Fritz!Box is part of the VLAN 20 setup by the ER605. The internet connection itself is established by the ER605.

Right now my config looks like this:

There is another VLAN without a router between the ER605 and the clients witch uses SLAAC+RDNSS and just works fine. Every clients gets its own IPv6 address.

What am I missing out? 

Please let me know if you need further information.

Regards,

Simon