samba - Apr 2025 - Member can't join DC2 (The specified network name is no longer available)

We?ve removed the possibility of a bad DC2.

If all else seems OK, I am running out of ideas.

On 24 Apr 2025 at 10:55 +0100, Adnan R. via samba <samba at
lists.samba.org>, wrote:
> Le mer. 23 avr. 2025 ? 22:43, Luis Peromarta via samba
> <samba_at_lists_samba_org_p4g274wpr5e8cy_m46f8153 at icloud.com> a
?crit
> :
> > I can?t really get anything conclusive from your logs. Are they
truncated ?
>
> No, they are the full logs from Windows 10. But they are redacted (I
> changed the domain)
>
> > I?d demote it. You run a hypervisor. Get a snapshot of everything
while turned off if you want to fever back.
>
> I can always reinstall it anyway, you are right.
>
> Le jeu. 24 avr. 2025 ? 08:35, Rowland Penny a ?crit :
> > If you are going to turn off a DC for any length of time, then, in my
> > opinion, you should demote it.
>
> I demoted it, removed it, checked all the DNS, etc...
>
> I tried to rejoin, same error.
>
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On Thu, 24 Apr 2025 14:10:47 +0100
Luis Peromarta via samba <samba at lists.samba.org> wrote:
> We?ve removed the possibility of a bad DC2.
> 
> If all else seems OK, I am running out of ideas.
> 
Okay, this what I would do:

First carry out an ldap search in AD for DC2, just to make sure that
there are no leftovers. next, using Debian 12 with Samba from backports
(this gets you Samba 4.21.5) join a second DC at your first place (note
I say 'place' not 'site', you are not using 'sites'). If
this works,
then you are a step forward.

Once you are sure everything is working correctly at your first place,
read this:

https://wiki.samba.org/index.php/Active_Directory_Sites

Then setup a second site for your second place.
Now attempt to join a new DC at your second site, do not point to a
specific DC with the 'samba-tool domain join' command, but do specify
the 'site' (see 'samba-tool domain join --help' for more info).

If that works then great, you can now add a second DC at your second site.
If it doesn't, then post any and all errors.

Rowland