[Samba] how to manually specify domain controllers

[Dennis Xu]

We have two Samba 4.2.3 servers with FreeRadius to authenticate wireless users against active directory. Using DNS, sometimes both servers end up using the same domain controller to authenticate users. I would like to distribute the load to different DCs. Is there a way to manually point Samba to certain DCs? 

I tried the following configuration: 
security = ads 
password server = dc05.cfs.uoguelph.ca 
realm = cfs.uoguelph.ca 

But after restarted the smb, nmb and winbind servers, the server is still using the old DC for authentication(not switching to dc05.cfs.uoguelph.ca). Any ideas? 

Thanks! 


Dennis Xu