The LED status still remains blue. There is no indication from the LED. The interruption is very brief...3-6 seconds. At worst 10 seconds. I strongly believe this is an issue with the TP-Link router...

I am getting frequent interruptions with internet. Typically every 10-15 minutes with lost connection for ~5 seconds (for the last 2 years!). ISP is ATT Fiber at 1Gbps. I have assumed the problem was...