Actually there needs to be changes to netplan to emit the correct IPV6BytesMtu setting to networkd; and then cloud-init can emit the correct netplan yaml for that. This feature is on the netplan roadmap here:
https://trello.com/c/nIjLIRSG/6-support-ipv6-mtu-bytes-configuration ** Also affects: netplan.io (Ubuntu) Importance: Undecided Status: New ** Also affects: cloud-init (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1671951 Title: networkd should allow configuring IPV6 MTU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1671951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs