Deployed IPv6 on my internal network of Linux machines. These machines work
with network-manager, dnsmasq and resolvconf. The moral of getting
IPv6 to work: radvd on the server, dhcpv6 didn't work for me.
If you want static IPv6 addresses you must disable the IPv6 privacy extensions
from within network-manager otherwise it won't work. In my case I had to
edit: /etc/NetworkManager/system-connections/Wired\ connection\ 1 and
changed:
[ipv6]
method=auto
To:
[ipv6]
method=auto
ip6-privacy=0
Settings from sysctl will be overruled... took me a while to find this.