moving samba4 DC to new AD site and creating second DC

Matthieu Patou mat at
Tue Apr 9 01:07:24 MDT 2013

On 04/08/2013 11:49 AM, David Mansfield wrote:
> Hi,
> I'm moving onto the next step after setting up a samba4 dc for my 
> small business network.  I need to set up a second DC in a separate 
> location and I'd like some machines to use it based on subnet etc.
> As I have read in previous posts on this list, for this to work, the 
> two DC need to be in different "sites", but there was some discussion 
> at the time that moving a Samba4 DC to a different site would not work.
It should work, you have to create a new site, add the new DC and then 
move it. At least it used to work a year ago or so.
Now it's not impossible that Samba is not taking full advantage of the sites
> Is this still the case?  Is there a workaround to this?
> If possible, this should be documented in the 
> Samba4/HOWTO/Join_a_domain_as_a_DC page, because it seems particularly 
> relevant.
> Also, as a primarily Linux person, there is discussion of migrating 
> and seizing the "FSMO" roles?  Can someone explain what this is and 
> what the required admin tasks would be in a setup with two DC in 
> different sites?

For 2 DC you shouldn't need to move the roles, and you shouldn't seize 
any role unless you can't recover a DC which had this role.

Matthieu Patou
Samba Team

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