You have to connect the extender to a computer or any other device through an Ethernet cable. Then, open any web browser and go to the Linksys router extender setup paver. Here you will see
http//extender.linksys.com re6300 web page. Now, enter the username and the password to log in to the extender. Use the default credentials of you have not changed the default settings. The above mentioned link will direct you to the setup page. Follow the instructions to complete the set up.