VMG 3925 B10B 6to4 tunnel

Hi @Banger ,

Looking at the manual 6RD allows the VMG3925 to tunnel LAN packets addressed with IPv6 addresses through an ISP WAN that only works with IPv4 addressing and routing into to get to the IPv6 Internet or to the IPv4 Internet.

Pages 94 and 95 of the manual ftp://ftp.zyxel.eu/VMG3925-B10B/user_guide/VMG3925-B10B_V5.13.pdf is good on this.

You might also need to investigate Microsoft Teredo Tunneling see https://en.wikipedia.org/wiki/Teredo_tunneling which allows IPv6 packets to be tunnlled through an IPv4 network and works through NAT see also https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-xp/bb457011(v=technet.10)?redirectedfrom=MSDN 

But it depends what you are trying to do.

    - Teredo has an architecture that allows IPv6 to be tunnelled through an IPv4 network but it needs some Teredo clients, servers or relays to be set-up in order to make it work.

          - Microsoft call it a transition technology, to allow the move towards IPv6 working.

The IPv6 Internet is ongoing, and this Wikipedia article talks about how far it has got https://en.wikipedia.org/wiki/IPv6_deployment 

Merry Christmas and Happy New Year.

Tony