Re: IPv6 networking problems in 14.3

> On 17 Sep 2025, at 14:20, Chris Ross <cross+freebsd@distal.com> wrote:
> So, on the idea of trying to back-date the whole machine, I have ZFS
> snapshots of the whole root from just before the first upgrade,
> Aug 7/8.  […]

Brief update, more to come later I hope.
I don’t know all of the magic of freebsd-update, but I was able to
figure/infer that it created versions (clones?) of the root fs
at points of upgrade.  I was able to swap one of those in, leaving
the current system where it was at zroot/ROOT/default.  I’ve set
bootfs to the older 14.1 system and gotten that running.

It _started_ looking bad, doing what the newer system was doing
by sending out SOLICIT6 messages and not getting an answer from my
ISP.  But as Karl noted, if I waited long enough (2ish hours in my
case), it eventually did get an answer!

So, if anyone has suggestions of wise diagnostics to grab while
it’s working, let me know.  Then the next step is to try 4.3
again, and see if it’s failing in the prior way still, or if it also
starts by sending SOLICIT6 for a while and maybe after a few hours
will get an answer.  If that doesn’t, I’ll try interface
switching again and other of the prior attempts, but being
more patient will make that process take some days.  So, just
an update that I backed out to an early-August configuration
that is again working, and I’ll try moving back to 14.3 again
in a few days.

- Chris