Fixed in Ubuntu 20.04! You just need to add a link-scope route for your gateway, as documented: https://netplan.io/examples/#reaching-a -directly-connected-gateway
network: ethernets: ens3: dhcp4: true addresses: [ "2602:ff75:7:34fd::/128" ] routes: - to: "2602:ff75:7::1/128" scope: link - to: "::/0" via: "2602:ff75:7::1" on-link: true version: 2 ** Changed in: netplan.io (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1785493 Title: Netplan on-link does not work for IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/1785493/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs