Ubuntu focuses on netplan with systemd-networkd or Network Manager, and ifupdown isn't really supported any more except for edge cases not supported by netplan. Since vlan is supported by netplan, I'm therefore marking this Won't Fix for the Ubuntu development release.
Note that ifupdown in Ubuntu barely differs from Debian now, so it seems likely to me that there would be no difference in behaviour from Debian here. ** Changed in: ifupdown (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1628591 Title: ifup & ifdown don't work for vlan devices when raw device name is the new "enp" convention To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1628591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs