The Juniper ScreenOS firewall is one of the seldom firewalls that implements DHCPv6 Prefix Delegation (DHCPv6-PD). It therefore fits for testing my dual stack ISP connection from Deutsche Telekom, Germany. (Refer to this post for details about this dual stack procedure.)
It was *really* hard to get the correct configuration in place. I was not able to do this by myself at all. Also Google did not help that much. Finally, I opened a case by Juniper to help me finding the configuration error. After four weeks of the opened case, I was told which command was wrong. Now it’s working. ;) Here we go.