How to setup Asus RT-ac3100 router with arris TM3402A Modem/Router?



First you need to connect an Ethernet cable from the modem to the WAN port of the router.
Than other Ethernet cable from the LAN port of the router to the router to the computer.
And than go to the computer and see the wifi icon over their and check the wifi list and you will see the name of your router over there.
Than click on it and it will ask for the security key and you will see that key on the back of your router and click on connect.
And than you need to pull a browser and see whether you are getting an internet.