So with Ubuntu 19.10 ifupdown got removed from the default packages.
This i found out in horror, after i was connected to my 2 networks at once, after a reboot (after upgrading to 19.10). For clarification, i have one network which is only internal and one which is external. I do not want any machine to be connected to both at once. So i pass my network card (attached to the external network) to my VM and my Host system is attached to the internal network. This was configured via ifupdown in /etc/interfaces:
auto enp2s iface enp2s inet manual
So the Ubuntu network GUI neither show the ethernet connection, nor connected to it.
How can i archive this functionality with netplan?