2. Configure IPv4/v6 Outer Tunnel $ show version Version: VC6.6R1 (VyattaCore 6.6R1) VR-1 IPv4 over IPv6 Tunnel 192.168.168.1/24 tun0 2001:db8::1/64 eth0 set system host-name VR-1 set interfaces ethernet eth0 address 2001:db8::1/64 set interfaces tunnel tun0 address 192.168.168.1/30 set interfaces tunnel tun0 encapsulation ipip6 set interfaces tunnel tun0 local-ip 2001:db8::1 set interfaces tunnel
![IPv4 over IPv6 Tunneling with IPSec [DRAFT]](https://cdn-ak-scissors.b.st-hatena.com/image/square/c260bd3bae43c9b8e45fa138a90a6d39d32c31b9/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fipv4overipv6withipsec-20140204-n-matsumoto-140204035813-phpapp02-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)