16.04: New naming convention for Ethernet Devices?

Hey everyone,

So I am starting to embrace the new server edition and after years of considering the 14.04 server release Ubuntu's best to date, I am now starting to do installs with 16.04. (I've had enough "spending hours tearing my hair out" experiences that I now only use LTS releases)

One thing that has stood out to me is that there is now a new naming convention for Etheet devices. What I used to know as eth0, has now become enp2s0

Does anyone know why this was done?

Can anyone explain to me what the naming convention now is? How can I predict what it might be on a new system.

On FreeBSD the network devices are named after the module name (em0, em1, igb0, igb1 etc.) but that is obviously not the case here, since I am using the tg3 module for my Broadcom NetXtreme card, and "enp2s" looks nothing like "tg3"

I decided to see if I could look at the udev rules (/etc/udev/rules.d/70-persistent-net.rules) and maybe change the names, but that file doesn't appear to be there at all anymore. In fact ALL the udev rules files are gone. (??)

Can anyone help make me somewhat less confused as to how this all works now? I had just become so good at managing it the old way

It always seems that as soon as you lea something well enough to be comfortable with it, they go and change everything ;p