Hello, today I received a mail from my ISP Netcologne via SixXS that I can participate in their test phase for native IPv6 deployment. I'd like to do that, but I've some questions: My AVM 7270 router can either connect natively or via the current static 6in4 SixXS tunnel, apparently not both at the same time. So I have to disable my tunnel while being connected natively, so my ISK would probably get lost because of the downtime. I'd like to keep the tunnel as a backup, though, in case the native connection won't work properly in the first time. Is there an easy solution for this? Even if all works well, and I can use the native IPv6 connection from now on, I'll probably need another (or accordingly changed) SixXS tunnel with a new endpoint in a few weeks or months, where an internet connection is currently planned. I'll probably need a heartbeat tunnel there. Regards, Christoph