@RPCA I believe my Issue is resolved based on last 3 weeks of observation. I noticed everytime the connection is lost, the internet connection is fine on the cable modem, but not on the X60 router....

@David-TP Hello My Service provider is Xfinity using ARRIS SURFboard SB6141 8x4 DOCSIS 3.0 Cable Modem. I did not Check the IPV4 setting. However, when I connected my computer directly to the Cable...

I am having a similar issue. X60 keep disconnecting. the light turns red on all 3 routers. After some time, it reconnects at its own will. some times in 10 minutes to 1 hour. I checked the cable...