Netgear CM1200: "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW"
Background: Had one of the old Arris Comcast modems for quite a while. They sent me a new one but I thought I'd just get a better cable modem and upgrade for Gigabit capability. So I got a Netgear CM 1200.
The house is new construction (less than 3 years old) and Comcast installed the first drop from the pole to the house. We have multiple outlets in multiple rooms, but we don't use cable TV and the Comcast tech only connected the coax to the room we're using as he said unused outlets acted like antennas and contributed to signal degradation.
Switching to the new modem brought trouble. Random disconnects every few days. They've increased in frequency and now I'm getting consistent 20-50% packet loss.
The modem is throwing multiple errors in the log.
"Started Unicast Maintenance Ranging - No Response received - T3 time-out;"
"REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;"
"Notice (6) TLV-11 - unrecognized OID;"
"Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;"
My upstream signal levels are at 48.5dBmV which seems high. My downstream are between 4.5dbmV and 8dBmV. No uncorrectables but a reasonable amount of correctables. My signal to noise ratio is between 8 and 9dB.
The modem is connected directly to the wall. No splitter.
I tried a Comcast chat agent to try and get a tech out to check the line, but they asked a bunch of questions, issued a "signal refresh" then told me if the problem doesn't fix itself, then it's my modem. This seems unlikely.
Does anyone have any idea how I can get this sorted? Comcast support doesn't seem like the route to go. And can anyone knowledgable comment on my modem signal levels?
Any help greatly appreciated. I'm frustrated and have no idea how I can get Comcast to take this seriously.