The Linksys re6400 extender has the simplest setup points that you can follow easily. Foremost of all, plug in the extender to a power socket and turn its switch on to prepare it for the setup. Make sure to place it closer to the existing router for a stable and successful linksys re6400 setup. Meanwhile, check the WPS compatibility of both devices as they must be working for a WPS connection. Afterward, press the WPS button from the extender first and then from the router. Finally, check the LED indication as there will be stable lights on the panels once the setup is complete.