In order to connect Netgear EX6100 v2 Extender with a Linksys EA7500 Router, please follow the below:
Connect your extender to the power and wait until it boots up.
Connect your Computer to the Extender Via wifi or ethernet.
Pull up a browser and at the top of the address bar type in 192.168.1.250 and hit enter.
You will get to the setup screen for the extender, Follow the instructions and complete the setup.
Plug in the extender to the power wait for it to boot up.
Press and hold the WPS button on the extender for 3 Seconds and then within 2 minutes press and hold the WPS button on the linksys router for 3 Seconds.
you will see a flashing light on the extender and the router, after you see the flashing light went to solid light the extender setup is complete.