I’m trying configure an adicional Nethserver with ldap autentication and that autentiction made with the same users from the primary domain controler (NethServer)
I’m quite sure that is not possibile.
Function you are using is intended to configure NethServer with an existent
AD domain controller to reuse users and groups.
I don’t know if with Samba is possible to have a PDC and BDC but with some tricks you could achieve this.
If you think that full restore from backup takes too much time you could have a fake BDC that is equal to the PDC through rsync, in case of disater the fake BDC can bu used as PDC.
IMHO you don’t really need it…
the implementation of such a feature is far more difficult than a restore of server configuration on a new machine
moreover, I’d say that there’s no linux server oriented distribution that has this feature (but I’d like to know if I’m wrong)