Steps for reset:-
Unplug modem.
Press and hold the reset button on your wireless router (hold for 10-15 seconds).
After releasing the reset button, wait approximately 10-15 seconds and then unplug your wireless router.
Plug your modem back in and wait a minute for it to completely boot up.
belkin setup n300 range extender
belkin n300 wireless range extender setup
belkin range extender setup