I'm looking for help to configure network on ubuntu core, I changed the netplan config and I manage to connect to both wifi and ethernet at the same time but there's an internet connection only on wifi. When I'm only on wifi internet works correctly but as soon as I plug the ethernet it stops and I can't ping anything. Is there an option to "try" both network interfaces when pinging something or should I set some sort of priority (I don't even know if it's possible) ? Because in my case internet comes from wifi but it will not always be the case so forcing internet on wifi in some way is probably not the best solution. I'm a beginner in both linux systems and networking so there's probably something obvious I didn't figure out.
Edit : As mentionned I'm using Ubuntu core so no GUI available. I'm changing netplan config via ssh.