Sorry, may have mistaken the question... did you ask about changing the name of the master controller or the DNS server IP address? If it is the DNS server IP address and you have static IP addresses, you cant make a wholesale change. You will have to do it manually.
As Colin said, if the DNS IP is handed out by DHCP, just make the change on the DHCP server.
If you asked about the master controller name, then my original post shoud answer that.