What can I tell Comcast to get past 'Access Denied'?

Hello amazing Netgear community!

 

I got tired of paying Comcast to rent their hardware and bought a C7000v2 a few months ago. Generally, things have worked fine, but over the last few weeks, we've been experiencing long periods of internet outage (a few hours at a time). I've tried all of the basic stuff (having Comcast "send the code" to the router, rebooting, even factory resetting), but it seems to be a problem that only resolves itself over time, despite Comcast's website not reporting any outages in our area.

 

Well, it happened again this morning, and I decided to do a little more digging. After seeing the dreaded yellow (!) sign next to my wifi connection, I connected to the router, where the "Cable Connection" tile on the main screen was red and said "In Progress." I drilled in, and over a period of a few minutes, noticed that it seemed to be cycling through three states:

1. Not yet aquiring a downstream channel
2. Locked on a downstream channel and Connectivity State == "Phy Synchronized"
3. Locked on a downstream channel and Connectivity State == "Access Denied"

I looked online first, and it generally seemed like other people who have encountered this issue haven't had any luck actually calling a Comcast technician, so I'd rather avoid going down that path. There were some earlier threads with a mention of asking Comcast to make a switch from IPv4 to IPv6, but others were skeptical about that solution.

 

So, my question is this: Given that I'm almost positive that this issue relates to Comcast not playing nicely with my Netgear hardware, AND the fact that things have worked in the past (so it doesn't seem related to hardware/cables/etc), is there some pre-baked solution that I can call Comcast and ask them to do remotely, without spending hours on the phone and working my way through the tiers of support?

 

Thanks in advance, and I'm happy to provide more info if it would help!

 

-Ben