rockspace router supports 3 connection types, i.e. Dynamic IP, Static IP or PPPoE. You can choose these types from the drop-down menu of connection types during configuration.
Dynamic IP or DHCP (Dynamic Host Configuration Protocol) -- Allows a device (in this case, your router) to obtain IP address from the Internet Service Provider (ISP) automatically. It is recommended to choose Dynamic IP and it is the default because the process is automatic and requires no manual configuration.
Static IP -- Choose this option if your ISP provided an IP address and other information.
PPPoE (Point-to-Point Protocol over Ethernet) -- Choose this option if your ISP provided the PPPoE username and password.