Helo,

on http://wiki.centos.org/FAQ/CentOS7

in 3. And what if I want the old naming back? is written: /etc/udev/rules.d/60-net.rules seems necessary to override /usr/lib/udev/rules.d/60-net.rules

According to my experience, the text should be changed to: /etc/udev/rules.d/70-persistent-net.rules has to describe the naming rule according to this example: SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:00", ATTR{type}=="1", KERNEL=="eth0", NAME="eth0" where ATTR{adress} is the HWADDR of the network interface.

Static assignment: GATEWAY has to be configured in /etc/sysconfig/network