The Linksys extender is a technical device that comes with a range of powerful and advanced features. Which enables it to perform and extend the internet signals throughout every corner of the place. But, to achieve that, you need to set it up in the right way after getting familiar with the process and details. So, try to be aware of every basic detail of the extender that you need during the process. Basically, there are three different methods for the Linksys re6400 setup; each one has different setup steps. 

Which are the WPS, web-based, and WiFi app setup approaches. But, before moving to the setup process, you must read its manual setup guide which will walk you through a lot of information about it. Such as the default login details: username and password, web/IP address, some setup instructions, and essential details. These details will help you a lot to have a successful and hassle-free setup. Finally, start the setup that you want to choose and configure the extender in the right manner. But, keep in mind to not make any mistakes in the login credentials, and web/IP address to prevent issues in the process.