[Samba] Replication issue

mathias dufresne infractory at gmail.com
Mon Dec 7 12:21:41 UTC 2015

Before digging into the whole stack of what composed an AD, I would try to
replace this second DC (the one you called SDC).

When joining a DC to a Samba AD domain,if this DC was already decalred as
DC, Samba first demote that DC to then start a the whole process to join
that DC to the domain. And that whole process includes re-creation of the
AD database locally with full synchronisation.

Not sure that solves your issue, but it could.

In fact I would first test using a third (virtual) machine to create a
third DC, just to check your AD is able to synchronize. Then, if it works,
I would re-join the broken DC.



2015-12-07 12:02 GMT+01:00 Dave B <lancelot0501 at gmail.com>:

> Greetings,
> I inherited a samba based domain at my work with two domain controllers
> running Zentyal 3.4.8 with samba version 4.1.6-Zentyal. I don't know if
> it's modified by the Zentyal team but they don't support this version
> anymore, that's why I'm writing to this list.
> The previos sysadmin told me that replication stopped working a while back,
> but only in one direction. PDC gets replicated to SDC successfully but SDC
> does not get replicated to PDC.
> If I run the samba-tool drs replicate PDC SDC DC=mydomain,DC=lan
> --full-sync command I get the following error:
> ERROR(<class 'samba.drs_utils.drsException'>): DsReplicaSync failed -
> drsException: DsReplicaSync failed (58, 'WERR_BAD_NET_RESP')
> Running samba-tool drs showrepl command on SDC returnt no error, running it
> on PDC returns this:
> DC=mydomain,DC=lan
>         Default-First-Site-Name\SDC via RPC
>                 DSA object GUID: 0a989f75-b8b8-4ae4-a6d3-b1a66fa1f895
>                 Last attempt @ Mon Dec  7 11:58:50 2015 CET failed, result
>                 6922 consecutive failure(s).
>                 Last success @ Mon Dec  7 11:58:47 2015 CET
> I've found similar problems, but no solution so far, so any help would be
> appreciated!
> Thanks in advance,
> David
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