From what I've read after some research, it should be possible!
Other people with cisco hardware and even manually were able to establish the 6rd tunnel.
I honestly spend well over 3 days on this with almost all combinations I can think of, it's sad that due to the lack of documentation and/or better error messages I will have to drop the Edgerouter. (It's also definitely partially my fault as not being on top of that)
If you @kevinm825 or anybody else still have ideas, let me know. But I also found another thread where someone had a similar problem as I had and gave up as the edgerouter couldn't handle the config while his other stuff could ...
Thanks for everyones help! It's been much appreciated
