On Wed, Mar 30, 2022, 2:15 PM Brian <a...@cityscape.co.uk> wrote:

> On Wed 30 Mar 2022 at 14:39:33 -0400, Greg Wooledge wrote:
>
> > On Wed, Mar 30, 2022 at 07:18:07PM +0100, Brian wrote:
> > > On Wed 30 Mar 2022 at 13:32:53 -0400, Greg Wooledge wrote:
> > > > 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.
> > >
> > > I would be interested in a couple of links to the same observations
> > > as given by the OP.
> >
> > <
> https://wiki.debian.org/NetworkInterfaceNames#Complications_and_corner_cases
> >
> > tries very hard to avoid mentioning the issue directly, but ultimately
> > has this paragraph down near the bottom of the section:
> >
> >   it turns out even after all this there are still reported cases of
> >   interfaces changing their name on a reboot. All that needs to happen
> >   is that some buggy BIOS (or some new, less buggy version of a driver
> >   module, or systemd's naming policy) changes its mind about some detail
> >   like whether or not your hardware counts as the kind that should have
> >   an ONBOARD name. There are even reports of devices changing their
> >   PCI-port numbering due to other hardware being installed.
> >
> > This links to
> > <https://utcc.utoronto.ca/~cks/space/blog/linux/PCINamesNotStable> which
> > goes into some detail.
>
> Thanks. Very informative. As the second link says:
>
>   The resulting reality is that your PCI based names are only
>   stable if you change no hardware in the system. The moment
>   you change any hardware all bets are off for all hardware.
>
> This, plus your advice, could point the OP to a way forward.
>
> How hardare specific the claim is is not explored.
>
> > I'm sure there are many more pages like this one.
> >
> > > Recently, we have had a mail or two about iwd. It uses the kernel
> > > interface wlan0, which broke my /e/n/i. In the end I went with the
> > > flow on the basis that wlan0 is stable enough and changed /e/n/i
> > > rather than fighting iwd.
> >
> > Wireless interfaces are not my strong suit.  I don't have any advice
> > for those.
>
> I only mentioned what I did bcause, om the whole, I am prepared to
> accept interface renaming. The vast majority of users will not notice
> that it has taken place.
>

Does anyone here know how the BSD-derived "free" unices handle this
situation?
And how about free-ish Oracle/Solaris?
And AIX running on Intel hard/firmware?

-- 
> Brian.
>
>

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