For ADSL connections from German Telekom you don't need (and cannot use) a VLAN port. Maybe you mix this up with VLAN 7/VLAN 8 used on VDSL lines. So just set up the PPPoE (PPP over ethernet, Ken) parameters in the physical interface setup and you're good. (I use that scheme all the time.)
For connection via IPv6 the interface should be configured as DHCP client. Unfortunately, I've got no experience with this. Particularily, I have no idea if you can connect to both IPv4 and IPv6 with different methods on the same port - I doubt that. You should give Telekom a call and ask for instructions how to set up IPv6.
"Kernel panic: Aiee, killing interrupt handler!"