Hello,

I just came across this question.

What you could do is enable IPv6 for your Docker deamon by editing your /etc/docker/daemon.json file and setting the ipv6 key to true.

{
  "ipv6": true
}

Then save the file and reload the Docker configuration file:

systemctl reload docker

After that you will be able to create networks with the --ipv6 flag and assign containers IPv6 addresses using the --ip6 flag.

Regards,
Bobby