This is the result of dmesg | grep eth0
e1000e 0000:00:19.0 eth0: registered PHC clock
e1000e 0000:00:19.0 eth0: (PCI Express :2.5GT/s:Width x1) xx:xx:xx:xx:xx:xx (=MAC address)
e1000e 0000:00:19.0 eth0: Intel® PRO/1000 Network Connection
e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: FFFFFF-0FF
e1000e 0000:00:19.0 eth0: em1: renamed from eth0
systemd-udevd[2750]: renamed network interface eth0 to em1