C7000v2 disconnecting all wifi bands at random times

Question

I've had this router since june 2019, use comcast and about a month ago we started losing connection every now and then, both the 2.4 ghz and the 5 ghz will go down and the only thing that fixes it is to unplug it or do a reset manually (netgear genie auto restart never works). Since the time of the issues I have changed the MTU size to the correct size (1498), set and deleted a port forwarding to avoid a strict NAT for gaming reasons and replaced the cable coming out of the wall to the modem issues have still persisted. Just before the issues started I set up a 2.4 ghz extender which works when the internet is working fine and my significat other started working from home. 5-8 of my upstream channels are not locked and I have no idea why. Here are my cable connections table, if any other information is needed please ask. Will I need to call in a tech from Comcast to check/replace the cables in the walls?

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	543000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+
IP Provisioning Mode	Honor MDD	honorMdd(4)

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	QAM256	17	543000000 Hz	-3.7 dBmV	39.8 dB	326	0
2	Locked	QAM256	1	405000000 Hz	-1.7 dBmV	41.1 dB	69	0
3	Locked	QAM256	2	411000000 Hz	-2 dBmV	40.8 dB	75	0
4	Locked	QAM256	3	417000000 Hz	-2 dBmV	40.7 dB	62	0
5	Locked	QAM256	4	423000000 Hz	-2.3 dBmV	40.3 dB	84	0
6	Locked	QAM256	5	453000000 Hz	-3.1 dBmV	40.1 dB	110	0
7	Locked	QAM256	6	459000000 Hz	-3.1 dBmV	40 dB	130	0
8	Locked	QAM256	7	465000000 Hz	-3.1 dBmV	40 dB	156	0
9	Locked	QAM256	8	471000000 Hz	-3.3 dBmV	40 dB	161	0
10	Locked	QAM256	9	477000000 Hz	-3.4 dBmV	40 dB	184	0
11	Locked	QAM256	10	483000000 Hz	-3.5 dBmV	40 dB	189	0
12	Locked	QAM256	11	489000000 Hz	-3.8 dBmV	39.9 dB	248	0
13	Locked	QAM256	12	495000000 Hz	-3.9 dBmV	39.8 dB	224	0
14	Locked	QAM256	13	519000000 Hz	-4.1 dBmV	39.6 dB	289	0
15	Locked	QAM256	14	525000000 Hz	-4 dBmV	39.6 dB	315	0
16	Locked	QAM256	15	531000000 Hz	-3.8 dBmV	39.7 dB	317	0
17	Locked	QAM256	16	537000000 Hz	-3.8 dBmV	39.8 dB	0	0
18	Locked	QAM256	18	549000000 Hz	-4 dBmV	39.6 dB	0	0
19	Locked	QAM256	19	555000000 Hz	-4.2 dBmV	39.4 dB	0	0
20	Locked	QAM256	20	561000000 Hz	-4.7 dBmV	39 dB	0	0
21	Locked	QAM256	21	567000000 Hz	-4.6 dBmV	39.5 dB	0	0
22	Locked	QAM256	22	573000000 Hz	-4.6 dBmV	39.5 dB	0	0
23	Locked	QAM256	23	579000000 Hz	-4.8 dBmV	39.4 dB	0	0
24	Locked	QAM256	24	585000000 Hz	-5.3 dBmV	39 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	2	5120 Ksym/sec	23700000 Hz	54 dBmV
2	Locked	ATDMA	1	5120 Ksym/sec	17300000 Hz	54 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	30100000 Hz	54 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	36500000 Hz	54 dBmV
5	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
6	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time:Wed Apr 29 10:59:25 2020

System Up Time:00:55:41

FURRYe38 · Answer

Have the ISP check the signal and line quality UP to the modem.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.

Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
Any Wifi Neighbors near by? If so, how many?

WalterS0bchak · Answer

Would I be able to check the lack of splitters without opening any walls? best I can do is take off a face plate and chaeck there. I replaced the cable with an amazonBasics CL2-Rated Coaxial TV Antenna Cable its RG6, but the rest is however old the rest of the cables are.

I live in an apartment so there are a usually 8 or so other wifi networks in the immediate area, I am on a lesser used channel. ill call comcast and get them to run the line.

FURRYe38 · Answer

Try turning down the power output of the modems radios as well. This may help with some interferences with nieghboring wifi and congestion. Maybe found under Advanced Tab/Advanced Settings/Wireless Settings

WalterS0bchak · Answer

I went there and couldn't find anything about limiting my power outage, is there anything specific I should look for?

monrubin · Answer

We are in the same boat. Comcast tech checked my line and denied that there wasnt anything wrong on their end. I didnt buy it. He told me that my modem/router is overheating. i requested their own modem to test and will be arriving Sunday. I will let you know what happens. Had this router since October. Never had a problem with connection when i had their modem. This problem happened since this Covid started. They did maintenance on their server and was fine for a week and its disconnecting again. Following your post also since I need some answers. I hope someone can help us here.&nbsp;

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C7000v2 disconnecting all wifi bands at random times

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