I believe this is due to https://github.com/systemd/systemd/commit/4b151b71320bbee1549afcbad5554a40d90d63b4
and probably is https://github.com/systemd/systemd/issues/12552 fixed by https://github.com/systemd/systemd/pull/12574/commits which prevents the automatic mtu bump when MTUBytes is specified but i'm still uncertain about upstream's link_get_requested_mtu_by_stacked_netdevs() function, that bumps MTU automatically; I might be misunderstanding it, but I don't think it is needed or even correct - but I need to look more closely at it and haven't had time. ** Bug watch added: github.com/systemd/systemd/issues #12552 https://github.com/systemd/systemd/issues/12552 ** Also affects: systemd via https://github.com/systemd/systemd/issues/12552 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846232 Title: networkd pads interface MTU by 4 bytes for vlan even when told not to To manage notifications about this bug go to: https://bugs.launchpad.net/curtin/+bug/1846232/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
