Chuck Anderson wrote:
I think that is "persistent udev naming rules" which tries to keep the eth name the same for every boot despite additional interfaces coming/going, e.g. usb or other hotplugged devices.
You can find the mapping of ethernet address to device name here and change it if you want:
/etc/udev/rules.d/70-persistent-net.rules
That was it: I removed from that file two lines referring to eth0 and eth1, and after reboot my Ethernet comes up as eth0. Thanks!
Also, make sure your ifcfg-ethX files have matching HWADDR= lines. e.g. ifcfg-eth0 should save DEVICE=eth0 and HWADDR= that matches the ATTR{address} from the persistent-net.rules above.
There are no fcfg-ethX files in /etc.