Nighthawk X4S AC2600 smart wifi router and a Netgear N600 wifi router
I have two routers. the Nighthawk AC2600 or model R7800 is my main router in the center of my house. I have the N600 or Model Wndr3400-100nas that is at the end of my house. i set them up as the guy at Fyes Electronics told me and everything was working great!!! i had someone over working on running an ethernet cord for me for another device and he said oh i can wire all 3 of your routers so you only have one login in. Well he could not so i told him to put everything back the way it was. Well now my second router that was getting max wifi speed of 75 is on getting about 20. I get 94 when i am hardwired to the N600 but i want to get my 75 back on wifi. i was reading somewhere on internet that when you have two modems sometimes the signals could interfere. i cannot remember how the Fryes guy told me to set the 2nd one up now as its been a year but how it told me worked like a champ. Anyone know if there is a setting that i need to change on my N600 (WNDR3400) ?