I have an old working network and I want to setup a vlan because I want to install the new server with a diffrent IP address and also to have internet on the server

both servers have the same name and finally the ip address will change to
I want to use just for the installing
I'm installing the server on a VMware esxi 4 and will run on it 2 servers
1 sbs 2011 the will manage all the network - dhcp dns exchange AD
2 server will be 2008 R2 for blackberry
please help