Wouldn't having my main router connected to the modem on wan port (as it is now) not cause a conflict if I connect a lan port of 1st router to the wan port of 2nd router. Thanks

I just bought a Archer c2700 to use as my main router and my c2300 as a extension. I can't get the guest wireless to work on the c2300 now and my internet has a red X on this router. I can access the...