Networking on Linux in general seems to be very susceptible to "wrong tutorial" in recent years, what with distros switching between different network control suites.

So far, I've been a big fan of netplan (which I guess is tied in with cloud-init?). Dropping a YAML file that declares the network setup I want and lets a swappable renderer make it so on the backend is a nice change from the brittle-over-time series of commands that it took previously.