Not sure if that applies here, but "fe80::a8bb:ccff:fedd:eeff" is not a valid ipv6 address on this machine.
instead try "fe80::a8bb:ccff:fedd:eeff%ens3" The problem might be with "systemd-resolved" which happily serves "fe80::a8bb:ccff:fedd:eeff" as an ipv6 address of this machine. I stumbled over this ticket based on symptoms I saw (unrelated to netplan), and searching for some keywords... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1737976 Title: netplan cannot set IPv6 token To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1737976/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs