[systemd-devel] About stable network interface names

[Greg KH]

On Mon, May 29, 2017 at 11:34:13AM +0200, Cesare Leonardi wrote:
> On 29/05/2017 07:10, Greg KH wrote:
> > Anyway, PCI can, and will sometimes, renumber it's devices on booting
> > again, that's a known issue.  It is rare, but as you have found out,
> > will happen.  So anything depending on PCI numbers will change.  Nothing
> > we can really do about that.
> 
> Do you mean that it could rarely happen on boot also without doing any
> change to the hardware?

Yes it can, I used to have a machine that renumbered the PCI buses every
5th boot or something, was fun for testing PCI changes on :)

> So, to avoid surprises, in case of multiple NICs it's highly recommendable
> anyway to hook interface naming to MAC address, isn't it?

Yes, or something else that you know will be stable in the system.

good luck!

greg k-h