To set up a Linksys EA3500 router, connect your main computer directly to your internet modem and connect the modem to the router's internet port. Run the Cisco program on your computer to access the router's settings menu with options for router settings, connected devices, guest access, and parental controls. For router support, contact Linksys customer care at 1-800-335-8177 to speak with a technician who can assist with any router issues.