Using your router as a switch dir-655

http://www.technoleros.com/turn-a-d-link-dir-655-router-into-a-secondary-access-point/

1. Plug the power into the access point router. Connect one of your computers to the router (LAN port) using an Ethernet cable.
2. Open a web browser and enter http://192.168.0.1 and press Enter. When the login window appears, set the user name to Admin and leave the password box empty. Click Log In to continue. (Note: these are the D-Link default values.  If you have changed the default IP address or Admin password, substitute the appropriate values)
3. Click on Advanced and then click Advanced Network. Uncheck the Enable UPnP checkbox. Click Save Settings to continue.
4. Click Setup and then click Network Settings. Uncheck the Enable DHCP Server checkbox. Click Save Settings to continue. Ensure to disable all of the following options as they will be no longer needed or usable while using this mode: Virtual Server, Application and Port Forward Rules, Access Control and Web Filters, SPI and Firewall, WISH and WPS.
5. Under Setup or Basic/Networking, enter an available IP address (192.168.0.50-.59 is recommended by D-Link) and the subnet mask of your network, usually 255.255.255.0 or .255. Click Save Settings to save your settings. Use this new IP address to access the configuration utility of the access point router in the future. Also turn off or disable other features on the access point router (Port Forwarding, Firewall, WISH, WPS and any email logging). Save the settings. Close the browser.
6. Connect an ethernet cable in one of the LAN ports of the access point router and connect it to one of the LAN ports in your host router. Do not plug anything into the Internet (WAN) port of the router that your turning into an access point. Use the LAN ports only.
7. You may now use the other 3 LAN ports of the access point router to connect other ethernet devices and computers (it acts as a switch). To configure your wireless network, open a web browser and enter the IP address (192.168.0.50) you assigned to the access point router. Recommend using Mixed G and N or Single G or N modes.  That’s it!