Using RT-AC5300 into a CM1000.
Same issue as the below thread. Comcast has a bunch of outages last week in my area. All of the sudden, internet randomly drops a couple of times an hour for 5-15 minutes. At the request of tech support I bought a new modem. Same issue. Plugging directly into the modem during the outages gives the same issue, ruling out the router. When I am in the router I see messages about Your-ISP-s-DHCP-is-not-functioning-properly.
We appreciate you for using the Xfinity Forum to inform us of your connectivity issues. I've had the chance to reply to your private message and look forward to chatting with you.