Xenial's v6 dhcp has been working much better for me since this was fixed https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633479 https://bugs.launchpad

Xenial's v6 dhcp has been working much better for me since this was fixed https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633479 https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633... Prior to that dhclient fix, dhcpv6 was basically unusuable on 16.04.