Comment 2 for bug 1693122

Hello and thank you for reporting this bug.

What exactly is the use case / why do you need networking for your database to start?

The MongoDB service is for the mongodb server, as far as I can tell, which is for serving databases. By default that is done locally. If you need to server your MongoDB over the network (perhaps that is the use case here?) you do need to probably make systemd changes if the ordering needs to be different than the default.