NetworkManager and systemd-networkd/systemd-resolved

[Christoph Pleger]

Hello,

on my notebook computer, I have a WLAN interface that is managed with 
NetworkManager and a cable-bound network interface that gets its static 
IP address by a systemd-networkd configuration file. But as of course on 
a portable notebook the cable-bound network interface is not always 
connected, it is a additionally also managed by NetworkManager. Hostname 
resolution takes place through systemd-resolved, that is, 
/etc/resolv.conf is a symbolic link to 
/run/systemd/resolve/stub-resolv.conf .

This all works fine so far, but when the cable-bound interface is not 
connected (that means, when NetworkManager de-activated the connection), 
the nameservers defined for that connection in the systemd-networkd 
configuration file are still in the active systemd-resolved 
configuration, as can be seen in the file 
/run/systemd/resolve/resolv.conf and in the output of "resolvectl 
status". Though this is - at least in my case with maximum of three 
nameservers - only a cosmetic problem, my goal is that the nameservers 
defined for the cable-bound connection disappear from the active 
systemd-resolved configuration when the cable is disconnected.

Is it possible to realize such a combination of NetworkManager and 
systemd-networkd/systemd-resolved?

Regards
  Christoph