On 21.08.17 01:38, Daniel Reurich wrote:
> Hi,
>
> We discussed a few weeks back in a dev meeting whether or not to revert
> to jessie like naming scheme for ethernet interfaces by default.
>
> The eudev package (currently found in the experimental repos and at
> https://git.devuan.org/devuan-packages/eudev ) utilizes the same logic
> like udev does when it comes to interface naming schemes. The patch
> appended below would reverse the logic and make it opt-in rather than
> opt-out.
>
> This would lead network interface names default to the old "eth0" or
> "wlan0" scheme, rather than the new(?) "enp0s3"-like scheme. It implies
> having "net.ifnames=1" in the kernel cmdline to get the "enp0s3"-like
> scheme and not touching anything to get the "eth0" scheme.
>
> To keep these things consistent we should also apply the same patch to
> udev as well.
>
> Thoughts??

Looking at "man ifrename", we see:

-u Enable udev output mode. This enables proper integration of ifrename
in the udev framework, udevd(8) will use ifrename to assign interface
names present in /etc/iftab. In this mode the output of ifrename can
be parsed directly by udevd(8) as an IMPORT action. This requires
udev version 107 or later.

As this appears capable of maintaining static nomenclature for a sane
user interface, in the face of lower level irrationality, there appears
to be no basis for doing other than retaining the higher standard of
udev behaviour.

Not only is it feasible to retain static interface names, using a file
as we theorised on the thread, but that file is /etc/iftab. Simple.

Erik