I've recently just bought a brand new ASUS AX1800 Router and Arris Surfboard SB8200 Modem to replace my old equipment due to some awful internet issues. Most of the problems were solved with the new equipment but I've noticed the modem (which is less than a week in use) has rebooted several times on it's own during the few days I've had it plugged in. There has been several periods of maintenance from Cox in my area lately but I'm not entirely sure if this is part of the issue or not. On my modem the Upstream light is green instead of blue, but I figured this was due to me not having a gigabit plan so it wouldn't need to be in DOCSIS 3.1 mode. Again, not sure if this is part of the problem. I live in a large apartment complex and I'm not sure when the last time all of the wiring/cables has been inspected or replaced here. All of my issues started within the past 1-2 weeks coincidentally around the same time Cox has been performing several periods of maintenance. Originally I had an Arris Surboard SB6190 which after about a year started experiencing the dreaded latency spikes thanks to the Puma 6 chip. Since replacing the modem and router I have had steady speeds and no latency spikes, but the random rebooting from the modem is still a nuisance. Below are the most recent status & event updates from the last time my modem rebooted. Downstream Bonded Channels Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables 29 Locked QAM256 951000000 Hz -3.1 dBmV 41.4 dB 0 0 1 Locked QAM256 783000000 Hz -3.5 dBmV 42.1 dB 0 0 2 Locked QAM256 789000000 Hz -2.8 dBmV 42.3 dB 0 0 3 Locked QAM256 795000000 Hz -1.4 dBmV 43.0 dB 0 0 4 Locked QAM256 801000000 Hz 0.1 dBmV 43.4 dB 0 0 5 Locked QAM256 807000000 Hz 1.4 dBmV 44.0 dB 0 0 6 Locked QAM256 813000000 Hz 1.0 dBmV 43.9 dB 0 0 7 Locked QAM256 819000000 Hz -0.3 dBmV 43.5 dB 0 0 8 Locked QAM256 825000000 Hz -1.7 dBmV 42.9 dB 0 0 9 Locked QAM256 831000000 Hz -2.9 dBmV 42.2 dB 0 0 10 Locked QAM256 837000000 Hz -3.8 dBmV 41.6 dB 0 0 11 Locked QAM256 843000000 Hz -4.3 dBmV 41.3 dB 0 0 12 Locked QAM256 849000000 Hz -4.4 dBmV 41.2 dB 0 0 13 Locked QAM256 855000000 Hz -3.7 dBmV 41.5 dB 0 0 14 Locked QAM256 861000000 Hz -2.5 dBmV 42.1 dB 0 0 15 Locked QAM256 867000000 Hz -0.7 dBmV 42.9 dB 0 0 16 Locked QAM256 873000000 Hz 0.8 dBmV 43.5 dB 0 0 17 Locked QAM256 879000000 Hz 1.8 dBmV 43.8 dB 0 0 18 Locked QAM256 885000000 Hz 3.0 dBmV 44.2 dB 0 0 19 Locked QAM256 891000000 Hz 2.9 dBmV 44.2 dB 0 0 20 Locked QAM256 897000000 Hz 2.0 dBmV 44.0 dB 0 0 21 Locked QAM256 903000000 Hz 1.2 dBmV 43.5 dB 5957 4609 22 Locked QAM256 909000000 Hz 0.7 dBmV 43.3 dB 15130 22600 23 Locked QAM256 915000000 Hz 0.3 dBmV 43.3 dB 1744 4498 24 Locked QAM256 921000000 Hz -0.1 dBmV 28.4 dB 59746 179577 25 Locked QAM256 927000000 Hz -0.6 dBmV 42.9 dB 591 2919 26 Locked QAM256 933000000 Hz -1.8 dBmV 42.3 dB 0 0 27 Locked QAM256 939000000 Hz -2.7 dBmV 41.8 dB 0 0 28 Locked QAM256 945000000 Hz -2.9 dBmV 41.6 dB 18 15 30 Locked QAM256 957000000 Hz -2.7 dBmV 41.6 dB 29 4 31 Locked QAM256 963000000 Hz -2.3 dBmV 41.9 dB 13 53 32 Locked QAM256 969000000 Hz -1.6 dBmV 42.4 dB 13 55 159 Locked Other 300000000 Hz -5.0 dBmV 38.0 dB 184024141 0 Upstream Bonded Channels Channel Channel ID Lock Status US Channel Type Frequency Width Power 1 1 Locked SC-QAM Upstream 17400000 Hz 6400000 Hz 47.0 dBmV 2 2 Locked SC-QAM Upstream 23900000 Hz 6400000 Hz 46.0 dBmV 3 3 Locked SC-QAM Upstream 30300000 Hz 6400000 Hz 45.0 dBmV 4 4 Locked SC-QAM Upstream 36700000 Hz 6400000 Hz 45.0 dBmV 5 6 Locked SC-QAM Upstream 12600000 Hz 3200000 Hz 45.0 dBmV Date Time Event ID Event Level Description 04/03/2023 23:39 2436694061 5 "Dynamic Range Window violation" 04/03/2023 23:39 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM- 04/03/2023 23:39 73050400 5 "REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM- 04/03/2023 23:39 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.; 04/03/2023 23:39 73040100 6 "TLV-11 - unrecognized OID; 04/03/2023 23:39 68000300 5 "DHCP WARNING - Non-critical field invalid in response Current Firmware version: AB01.02.053.05_051921_193.0A.NSH I will be moving in about a month so if the issue lies with the wiring at my complex then I'll just hope that it goes away when I move. Any help is appreciated!

Woops, you're right. I've just removed hopefully everything that has MAC info, thanks for the heads up!

To update, the tech came out today and fixed some signal issues but my modem was still experiencing the random rebooting and boot looping after he'd left. At this point I was beyond frustrated and ended up exchanging it for a different modem entirely (Motorola MB8600) and so far it seems to be functioning as it should. The only thing I did different this time was have Cox activate it themselves instead of doing it from my end just to be safe. Keeping my fingers crossed!

How old it is depends on the hardware version, which I believe is up to 7 now. See thread here on differences. Besides, the MB8600 has a release date of 2017 too. Not sure if they also have different hardware revisions.

Do you have any splitters in the apartment or a closet where all the coaxial comes together? If not, it's probably your apartment complex wiring. The issue seems to be noise in the 900Mhz range. That's what is causing the uncorrectables. If you are moving in a month and the problem isn't that severe, I would wait. Make sure you get a professional install at the new place to double check your wiring/signal.

No splitters as far as I can see, I just contacted my complex management in case anyone else has been having issues or if they're able to send a tech out to look at things. The issue is a bit urgent since I work from home part of the week so I really can't be experiencing complete drops in connection for periods of time, just last night it got pretty bad and my modem was stuck in a boot loop until this morning when I finally unplugged everything and did a full reset of the modem. I tried replying last night with updated event logs but it got flagged as spam so I don't really want to try again lol. I am still in the return window for my modem in case it's defective and I've never had a modem get stuck in a boot loop before. I'll see what my complex says first.

SkullCat

New Contributor II

2 years ago

New Arris SB8200 Modem Rebooting

I've recently just bought a brand new ASUS AX1800 Router and Arris Surfboard SB8200 Modem to replace my old equipment due to some awful internet issues. Most of the problems were solved with the new equipment but I've noticed the modem (which is less than a week in use) has rebooted several times on it's own during the few days I've had it plugged in. There has been several periods of maintenance from Cox in my area lately but I'm not entirely sure if this is part of the issue or not.

On my modem the Upstream light is green instead of blue, but I figured this was due to me not having a gigabit plan so it wouldn't need to be in DOCSIS 3.1 mode. Again, not sure if this is part of the problem.

I live in a large apartment complex and I'm not sure when the last time all of the wiring/cables has been inspected or replaced here. All of my issues started within the past 1-2 weeks coincidentally around the same time Cox has been performing several periods of maintenance. Originally I had an Arris Surboard SB6190 which after about a year started experiencing the dreaded latency spikes thanks to the Puma 6 chip. Since replacing the modem and router I have had steady speeds and no latency spikes, but the random rebooting from the modem is still a nuisance.

Below are the most recent status & event updates from the last time my modem rebooted.

Downstream Bonded Channels
Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
29	Locked	QAM256	951000000 Hz	-3.1 dBmV	41.4 dB	0	0
1	Locked	QAM256	783000000 Hz	-3.5 dBmV	42.1 dB	0	0
2	Locked	QAM256	789000000 Hz	-2.8 dBmV	42.3 dB	0	0
3	Locked	QAM256	795000000 Hz	-1.4 dBmV	43.0 dB	0	0
4	Locked	QAM256	801000000 Hz	0.1 dBmV	43.4 dB	0	0
5	Locked	QAM256	807000000 Hz	1.4 dBmV	44.0 dB	0	0
6	Locked	QAM256	813000000 Hz	1.0 dBmV	43.9 dB	0	0
7	Locked	QAM256	819000000 Hz	-0.3 dBmV	43.5 dB	0	0
8	Locked	QAM256	825000000 Hz	-1.7 dBmV	42.9 dB	0	0
9	Locked	QAM256	831000000 Hz	-2.9 dBmV	42.2 dB	0	0
10	Locked	QAM256	837000000 Hz	-3.8 dBmV	41.6 dB	0	0
11	Locked	QAM256	843000000 Hz	-4.3 dBmV	41.3 dB	0	0
12	Locked	QAM256	849000000 Hz	-4.4 dBmV	41.2 dB	0	0
13	Locked	QAM256	855000000 Hz	-3.7 dBmV	41.5 dB	0	0
14	Locked	QAM256	861000000 Hz	-2.5 dBmV	42.1 dB	0	0
15	Locked	QAM256	867000000 Hz	-0.7 dBmV	42.9 dB	0	0
16	Locked	QAM256	873000000 Hz	0.8 dBmV	43.5 dB	0	0
17	Locked	QAM256	879000000 Hz	1.8 dBmV	43.8 dB	0	0
18	Locked	QAM256	885000000 Hz	3.0 dBmV	44.2 dB	0	0
19	Locked	QAM256	891000000 Hz	2.9 dBmV	44.2 dB	0	0
20	Locked	QAM256	897000000 Hz	2.0 dBmV	44.0 dB	0	0
21	Locked	QAM256	903000000 Hz	1.2 dBmV	43.5 dB	5957	4609
22	Locked	QAM256	909000000 Hz	0.7 dBmV	43.3 dB	15130	22600
23	Locked	QAM256	915000000 Hz	0.3 dBmV	43.3 dB	1744	4498
24	Locked	QAM256	921000000 Hz	-0.1 dBmV	28.4 dB	59746	179577
25	Locked	QAM256	927000000 Hz	-0.6 dBmV	42.9 dB	591	2919
26	Locked	QAM256	933000000 Hz	-1.8 dBmV	42.3 dB	0	0
27	Locked	QAM256	939000000 Hz	-2.7 dBmV	41.8 dB	0	0
28	Locked	QAM256	945000000 Hz	-2.9 dBmV	41.6 dB	18	15
30	Locked	QAM256	957000000 Hz	-2.7 dBmV	41.6 dB	29	4
31	Locked	QAM256	963000000 Hz	-2.3 dBmV	41.9 dB	13	53
32	Locked	QAM256	969000000 Hz	-1.6 dBmV	42.4 dB	13	55
159	Locked	Other	300000000 Hz	-5.0 dBmV	38.0 dB	184024141	0

Upstream Bonded Channels
Channel	Channel ID	Lock Status	US Channel Type	Frequency	Width	Power
1	1	Locked	SC-QAM Upstream	17400000 Hz	6400000 Hz	47.0 dBmV
2	2	Locked	SC-QAM Upstream	23900000 Hz	6400000 Hz	46.0 dBmV
3	3	Locked	SC-QAM Upstream	30300000 Hz	6400000 Hz	45.0 dBmV
4	4	Locked	SC-QAM Upstream	36700000 Hz	6400000 Hz	45.0 dBmV
5	6	Locked	SC-QAM Upstream	12600000 Hz	3200000 Hz	45.0 dBmV

Date Time	Event ID	Event Level	Description
04/03/2023 23:39	2436694061	5	"Dynamic Range Window violation"
04/03/2023 23:39	82001200	5	"RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-
04/03/2023 23:39	73050400	5	"REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-
04/03/2023 23:39	67061600	6	"DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;
04/03/2023 23:39	73040100	6	"TLV-11 - unrecognized OID;
04/03/2023 23:39	68000300	5	"DHCP WARNING - Non-critical field invalid in response

Current Firmware version: AB01.02.053.05_051921_193.0A.NSH

I will be moving in about a month so if the issue lies with the wiring at my complex then I'll just hope that it goes away when I move. Any help is appreciated!

cable modem

internet