Comment 23 for bug 1914740

I have made this PPA

https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4477

It has packages for focal versioned above current focal-updates version, but lower than the next SRU.

sudo add-apt-repository ppa:ci-train-ppa-service/4477
sudo apt install systemd

Should be enough to upgrade networkd. After that if you have installed network.d snippets you should remove them, and then reboot and things should just work. If reboot is too much doing chzdev -d / -e on the hipersocket interfaces that are in l3 should do the trick as well.

After testing you can downgrade / remove those packages with ppa-purge, or just leave them until next SRU update arrives.

If you can't use add-apt-repository (needs http(s) access to api.launchpad.net and ppa.launchpad.net) you can also download the .deb files from https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4477/+build/21099271 and install them with $ sudo apt ./*.deb => do not it has to "absolute path names, or paths prefixed with ./" for apt to recognise them to install from local files instead of trying to fetch things from the mirror.