I have a setup like that:

Samba PDC + Master OpenLDAP <-> WAN/VPN <-> Samba BDCs + Slave OpenLDAPs +
workstations (different branch offices)


Because Master/PDC and Slaves/BDCs are connected through the internet, sometimes
joining a workstation to a domain is impossible, (workstation is in the same net
as a BDC).

Here is a possible workaround as suggested in this thread (read the whole thread
to get an idea what happens):

http://lists.samba.org/archive/samba/2004-November/095286.html
http://lists.samba.org/archive/samba/2004-November/095289.html


So adding something like this (sleep) to smbldap_tools.pm, around line 380 (it
is smbldap-tools-0.85) helps:

        $add->code && warn "failed to add entry: ", $add->error ;
        # take down the session
        sleep(30);
        return 1;
}