Selling DHCP as service in service provide cloud is very benefecial. With the SP could raise the source of incomes without additional investment. Why I am talking about DHCP as service; how mpls sp could host the services per vpn basics? This is not the cost saving oppositely SP need to invest in DHCP servers as many as VPN need to be hosted. Totally wrong, SP can share the global DHCP servers among all the vrfs and ip addresses will be allocated according to the vrf. This service is nothing but need to use dhcp relay agent which will sophist this requirement.