eero not connect to the internet, eero is a mesh system. If you have an existing modem and router, you\ll need to connect them together to enable eero to connect to the internet. Follow the steps below to do this correctly. Connect the modem and router with an ethernet cable Plug the modem and router into eero, using ethernet cables Plug any remaining eero devices into the wall, using ethernet cables Make sure eero is plugged into an electrical outlet Start testing eero.