We currently have a lan, that contains VLANs. Our switches (HP Procurves, managed switches) have the ability to have certain ports on one VLAN, and certain ports on another. For example, half of our ports are 10.53.x.x and the other half would be 10.54.x.x however, these switches are not providing DHCP - we have a server doing that. How does the server know which ports to send out 10.53.x.x address versus 10.54.x.x addresses??