Sporadic router freeze on CAX80 - only when using WiFi

My Problem: Sporadic router freeze on CAX80 - only when using WiFi Am looking for help troubleshooting assistance. CAX80, hardware Version: 1.01, Firmware Version: v1.02.08. Connected to Xfinit...

Troubleshooting

Keninboston

Aspirant

Jan 06, 2024

Sorry about that, didn't cut and paste properly! Here is the additional cable info:

Cable Connection

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Cable Diagnostic

Status: Good

Action: Your setup looks fine. If you are still experience an internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.

Internet Access:

Downstream Status:

Upstream Status:

Refresh Save Cable Diagnostic Info

Advanced Information

Frequency Start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	565 MHz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	256 QAM	20	565750000 Hz	2.2 dBmV	45.3 dB	27	110
2	Locked	256 QAM	13	523750000 Hz	1.5 dBmV	45.4 dB	30	104
3	Locked	256 QAM	14	529750000 Hz	2.2 dBmV	46.0 dB	50	79
4	Locked	256 QAM	15	535750000 Hz	2.5 dBmV	46.2 dB	46	97
5	Locked	256 QAM	16	541750000 Hz	2.4 dBmV	46.2 dB	29	105
6	Locked	256 QAM	17	547750000 Hz	1.7 dBmV	45.5 dB	27	105
7	Locked	256 QAM	18	553750000 Hz	2.2 dBmV	45.0 dB	28	110
8	Locked	256 QAM	19	559750000 Hz	2.9 dBmV	44.5 dB	27	106
9	Locked	256 QAM	21	571750000 Hz	1.9 dBmV	45.6 dB	37	95
10	Locked	256 QAM	22	577750000 Hz	2.5 dBmV	45.1 dB	53	82
11	Locked	256 QAM	23	583750000 Hz	2.9 dBmV	45.3 dB	38	99
12	Locked	256 QAM	24	589750000 Hz	3.1 dBmV	45.2 dB	30	110
13	Locked	256 QAM	25	595750000 Hz	2.6 dBmV	33.7 dB	52	116
14	Locked	256 QAM	26	601750000 Hz	3.5 dBmV	36.0 dB	66	126
15	Locked	256 QAM	27	607750000 Hz	3.2 dBmV	44.9 dB	27	104
16	Locked	256 QAM	28	613750000 Hz	2.6 dBmV	45.8 dB	24	110
17	Locked	256 QAM	29	619750000 Hz	3.0 dBmV	45.7 dB	34	104
18	Locked	256 QAM	30	625750000 Hz	3.1 dBmV	43.8 dB	712	114
19	Locked	256 QAM	31	631750000 Hz	3.1 dBmV	42.7 dB	3858	112
20	Locked	256 QAM	32	637750000 Hz	3.1 dBmV	40.8 dB	36733	1073
21	Locked	256 QAM	33	643750000 Hz	3.7 dBmV	44.5 dB	31	105
22	Locked	256 QAM	34	649750000 Hz	4.4 dBmV	46.4 dB	23	112
23	Locked	256 QAM	35	655750000 Hz	4.5 dBmV	46.5 dB	21	116
24	Locked	256 QAM	36	661750000 Hz	4.3 dBmV	46.4 dB	43	94
25	Locked	256 QAM	37	667750000 Hz	4.3 dBmV	46.3 dB	33	100
26	Locked	256 QAM	38	673750000 Hz	4.8 dBmV	45.5 dB	27	108
27	Locked	256 QAM	39	679750000 Hz	4.8 dBmV	46.6 dB	26	104
28	Locked	256 QAM	40	685750000 Hz	4.6 dBmV	46.5 dB	32	99
29	Locked	256 QAM	41	691750000 Hz	4.7 dBmV	46.5 dB	35	103
30	Locked	256 QAM	42	697750000 Hz	5.4 dBmV	46.8 dB	32	103
31	Locked	256 QAM	43	703750000 Hz	5.5 dBmV	46.8 dB	37	97
32	Locked	256 QAM	44	709750000 Hz	5.0 dBmV	46.6 dB	28	103

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	3	5120 Ksym/sec	29200000 Hz	39.3 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	22800000 Hz	39.5 dBmV
3	Locked	ATDMA	1	5120 Ksym/sec	16400000 Hz	38.5 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	35600000 Hz	39.5 dBmV
5	Not Locked	Unknown	0	0	0	0.0 dBmV
6	Not Locked	Unknown	0	0	0	0.0 dBmV
7	Not Locked	Unknown	0	0	0	0.0 dBmV
8	Not Locked	Unknown	0	0	0	0.0 dBmV

Downstream OFDM Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0 ,1 ,2 ,3	193	957000000 Hz	-0.32 dBmV	42.0 dB	148 ~ 3947	755888644	506855611	91
2	Not Locked	0	0	0 Hz	0 dBmV	0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	0	0	0 Hz	0 dBmV
2	Not Locked	0	0	0 Hz	0 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time:Sat Jan 06 11:39:57 2024

System Up Time:1 days 23:17:23

FURRYe38

Guru - Experienced User

Jan 06, 2024

Power levels are ok and with in specs.

We see correctables and uncorrectables that should be mostly zeros.

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

Try changing channels to 1,6 or 11 on 2.4Ghz and 40, 44 or 48 on 5Ghz.

Has a factory reset and setup from scratch been performed since last update?

Keninboston
Aspirant
Jan 06, 2024
I've had the ISP check the line and even send someone out who replaced the cables and outlet. I'll ask again to make sure they provision properly and see if they can explain the correctable and uncorrectable which should be mostly zeros. I'm in an apartment building so I'm not able to control too much.

I'll also reset to factory defaults, change the channels again, and wait to see if I see anything changes.

I also turned off Enable LAN/WAN Packet Capture.

Thanks so much for the assistance, I'll be sure to update.
- FURRYe38
  Guru - Experienced User
  Jan 06, 2024
  Ok, Apartment comlex explains some, ya no telling what all is in the way from there the ISP comes in and ends up at the modem. 🙄
  
  Hope some of this can be helpful.

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Sporadic router freeze on CAX80 - only when using WiFi