Control: forwarded -1 https://github.com/systemd/systemd/issues/2189
I now bisected this and understand what's going on. Further details are in the upstream issue. If this was really deliberate and we can't prevent instantiated units from getting stopped during shutdown, then I propose as a fallback we just drop the ExecStop=ifdown (or replace it with some "echo not supported blabla, please use ifdown directly"). Michael, any objections to that? This is just an internal helper unit for the udev rule, after all. Martin -- Martin Pitt | http://www.piware.de Ubuntu Developer (www.ubuntu.com) | Debian Developer (www.debian.org)