Re: Predictable Network Interface Names
On Wed, Mar 30, 2022 at 05:35:12PM +0200, basti wrote:
> as I can read here [1] network names should be stable.
> (Stable interface names even when hardware is added or removed)
> [1] https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
Sorry, but you've been lied to.
> What I see now is:
>
> When I add or remove a PCIe card (USB card) the name is changed from enp5s3
> to enp6s3 and back for example.
Yes. You've now seen direct evidence of the lie. I guess I won't need
to post links to the wiki articles that say the same thing you've already
observed.
For most people, there are two paths forward:
1) If your system has exactly one ethernet interface, and if this is not
likely to change at any point in the future, you can go back to the
old old way of doing things -- let the kernel assign "eth0" to the
first interface it finds, "eth1" to the second interface it finds,
and so on. Since it will only ever find one interface, that interface
will always be named "eth0", and you can configure from there.
2) If you have multiple ethernet interfaces, or the possibility of this
occurring in the future, take control of their names yourself. Set
up systemd.link(5) files to assign a name to each interface based on
its MAC address, or some other identifying characteristic.
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