You must complete the Linksys RE6400 setup and attach the WiFi extender next to your primary wifi router by simply plugging it into a power outlet. Make careful to let the extender boot up before turning it on. Now grab any device you have, such as a computer. After that, connect to it after scanning the Linksys_ext-named device networks. Find extender.linksys.com in your internet browser and search there as well. At this time, you will be prompted to establish your own password. to protect yourself against the extender's setup difficulty. to protect your password from being used improperly. It will then scan your accessible network in the next phase. To connect the extender to the existing router, you must first provide your current WiFi password.