Essentially, the Linksys re6400 needs a few changes or adjustments other than default credentials that occur immediately after setup. Certain changes must be made even to some of the physical factors lying outside the extender itself, so as to achieve optimization of the extended performance of the extender. Once you are done with the Linksys re6400 setup, the next step is moving the extender to another location by locating it in a central place. This location will enable the extender to transmit internet signals in every corner. Furthermore, amend some internal modifications, such as default login details usernames and passwords, because the default password is so easy to gain access to unauthorized users on the network. Also change the new SSID network name of the network to give a unique distinction to the network. Lastly, select the less congested WiFi channels for the extender while ensuring that they are also different from the neighboring networks.