A client calls the dns server (SRV records) in its site for a dc, if there
is only one dc in this site then it has a good chance of connecting, unless
the dc is unavailable to respond from being to busy or down. From the size
of your network busy probably won't be a problem.
But the bottom line is you can't get a client to absolutely connect to the
same machine everytime. You could define a special dns server with the srv
records just for that dc, but then you would have to manually manage. There
is no way to guarantee a same connection everytime.
http://support.microsoft.com/kb/816587/en-us
http://support.microsoft.com/kb/306602/en-us
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Paul Bergson MCT, MCSE, MCSA, CNE, CNA, CCA
This posting is provided "AS IS" with no warranties, and confers no rights.