Summary
Quick steps to modify the udev file to change the ethernet device name.
Description
Created a udev file under /etc/udev/rules.d directory with the following content:
ACTION=="add", SUBSYSTEMS=="pci", DRIVERS=="?*", KERNELS=="0000:00:1d.1", NAME="ethernet1"
ACTION=="add", SUBSYSTEMS=="pci", DRIVERS=="?*", KERNELS=="0000:00:1d.2", NAME="ethernet2"
Observed the following error after rebooting the system and the device name did not change.
systemd-udev daemon got some errors (Device or resource busy) and it cannot change ethernet device name from "eth*" to "enp*" by default.
Resolution
Add ExecStartPre=udevadm settle before ExecStart=/usr/sbin/connmand -n in /lib/systemd/system/connman.service.