Comment 15 for bug 1750884

If we don't know, then maybe things should be passed to netplan, in a way for it to generate global resolved config? as in, create
/run/systemd/resolved.conf.d/global.conf

[Resolve]
DNS=999.999.999.999
(Maybe FallbackDNS=, if we want it to leave DNS= setting for users to tweak)

Or whatnot, which should then appear in systemd-resolve --status, Global section which is applied as a fallback if an interface does not have a per-interface DNS settings.

Could somebody try dropping dns configs out of netplan file that is generated, rerun apply, check that systemd-resolve --status has nothing, then add above drop-in with the right dns server, restart resolved, and check if that picks up a global DNS server, and if network resolution works correctly? *globally*

I also wonder, if .network / .link files should have an ability to specify Global DNS settings for resolved...