> FreeBSD’s DHCP client in base does not yet support DHCPv6. To get an IP and a prefix, you need to install one from ports. I’m using dhcp6c, following this guide[1] to set it up.
Colin Percival made it a bit easier (IMO)[1] it is meant for AWS EC2 but worked for me with my ISP as well. The guide you submitted probably will work everywhere.
[1] http://www.daemonology.net/blog/2017-01-26-IPv6-on-FreeBSD-E...