dns update for ipv6 using dhcpv6

I’m trying to build a homenet environment that includes some fedora 25 vms running NetworkManager-1.4.2-1.fc25.x86_64.  I’d like these computers to update dns when they get new ipv6 addresses. Working from the discussion on this page: http://bit.ly/2hr2SnC, I was able to construct a suitable dhclient6-eth0.conf to run directly with dhclient by adding a line:

send fqdn.fqdn “wibble.example.com

to the file created by NetworkManager in /var/lib/NetworkManager/. With the extra line, the relevant update is forwarded by dhclient.

However, I cannot work out where or what to put in NetworkManager’s or the redhat configuration to get NM to create a suitable dhclient6-eth0.conf file.

I also noted that the issue noted on the link above about ipv6.dhcp-hostname getting blown away each time the service is reset still holds with the nm version.

Am I looking at the right area to get the dns updated? If so, where should I be putting the configuration to get the right autogenerated dhclient file?

Thanks in advance


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