I also have this same bug. Details are in a posting in the forum with title "Three-interface system fails to add one IPv6 address", located at https://answers.launchpad.net/ubuntu/+question/632391.
The systems are all running Ubuntu 16.04 LTS, with all updates applied.
I also have this same bug. Details are in a posting in the forum with title "Three-interface system fails to add one IPv6 address", located at https:/ /answers. launchpad. net/ubuntu/ +question/ 632391.
The systems are all running Ubuntu 16.04 LTS, with all updates applied.