virtual servers

If I wanted to setup Virtual servers w/ FreeRADIUS 3 could I copy the files in /etc/raddb/sites-enabled/ to a different name and change the server name and the ip address it lives on?  I have tried doing this and gotten the following error: Failed binding to auth address 10.2.0.11 port 1812 bound to server wireless: Cannot assign requested address /etc/raddb/sites-enabled/wireless[59]: Error binding to port for 10.2.0.11 port 1812 I am running this on CentOS 7 latest.