Paul Rogers wrote:
Is there a good reason to have the persistent NIC rules? I've stumbled onto some wierd behavior where an on-board RTL-8169 gets a different MAC address under circumstances I haven't sussed out yet (00 1b b9 6b 96 06 and 00 00 00 00 96 06), so Udev reassigns it eth1 and network startup fails. I'm not sure why, whether it's udev, the chip implementation, or BIOS, but an easy fix would seem to be to delete that rules file as a matter of course at shutdown. But then the "easy" route is often wrong, so I ask.
The only place I've heard of changing MAC addresses is in a virtual environment and the script does not create the rules file in that case.
You can try removing the rules, but the name may then be something like enp0s1 instead of eth0. If there are other network cards, then you need to do something for consistent names. If there is only one, then you can add net.ifnames=0 on the kernel command line.
See https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
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