Slow upload speeds on my CM1000v2

Aspirant

Jan 21, 2022

See below for cable connection tables:

Starting Frequency

<tabindex=-1>Startup Procedure</tabindex=-1>

Procedure	Status	Comment
Acquire Downstream Channel	381000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enable	BPI+
IP Provisioning Mode	Honor MDD	IPv4 only

<tabindex=-1>Downstream Bonded Channels</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR / MER	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	QAM256	37	381000000 Hz	2.7 dBmV	44.6 dB	1334438430	1	0
2	Locked	QAM256	33	357000000 Hz	2.7 dBmV	44.1 dB	1332813476	0	0
3	Locked	QAM256	34	363000000 Hz	2.7 dBmV	44.6 dB	1332820587	1	0
4	Locked	QAM256	35	369000000 Hz	2.7 dBmV	44.1 dB	1332829348	0	0
5	Locked	QAM256	36	375000000 Hz	2.8 dBmV	44.5 dB	1332855787	0	0
6	Locked	QAM256	38	387000000 Hz	2.9 dBmV	44.7 dB	1332862300	1	0
7	Locked	QAM256	39	393000000 Hz	3.1 dBmV	44.7 dB	1332868462	3	0
8	Locked	QAM256	40	399000000 Hz	3.4 dBmV	44.9 dB	1332877388	4	0
9	Locked	QAM256	41	405000000 Hz	3.8 dBmV	45.1 dB	1332882769	14	0
10	Locked	QAM256	9	729000000 Hz	0.3 dBmV	40.7 dB	1365722977	14	0
11	Locked	QAM256	10	735000000 Hz	-0.3 dBmV	41.8 dB	1365729607	16	0
12	Locked	QAM256	11	741000000 Hz	-0.1 dBmV	42.6 dB	1365733376	25	0
13	Locked	QAM256	12	747000000 Hz	-0.3 dBmV	41.0 dB	1365736479	21	0
14	Locked	QAM256	42	411000000 Hz	4.1 dBmV	44.9 dB	1332923163	4	0
15	Locked	QAM256	14	759000000 Hz	-0.7 dBmV	42.4 dB	1365744175	36	0
16	Locked	QAM256	15	765000000 Hz	-0.5 dBmV	42.5 dB	1365747951	19	0
17	Locked	QAM256	16	771000000 Hz	-1.3 dBmV	42.1 dB	1365749336	28	0
18	Locked	QAM256	17	777000000 Hz	-1.0 dBmV	42.3 dB	1365753969	34	0
19	Locked	QAM256	18	783000000 Hz	-0.7 dBmV	42.5 dB	1365757249	33	0
20	Locked	QAM256	19	789000000 Hz	-0.9 dBmV	42.5 dB	1365761720	37	0
21	Locked	QAM256	20	795000000 Hz	-0.9 dBmV	42.4 dB	1365765868	25	0
22	Locked	QAM256	22	807000000 Hz	-0.8 dBmV	42.7 dB	1365769310	16	0
23	Locked	QAM256	23	813000000 Hz	-1.6 dBmV	42.1 dB	1365773345	17	0
24	Locked	QAM256	24	819000000 Hz	-1.6 dBmV	42.1 dB	1365777183	13	0
25	Locked	QAM256	25	825000000 Hz	-2.0 dBmV	41.8 dB	1365780151	13	0
26	Locked	QAM256	26	831000000 Hz	-1.8 dBmV	42.1 dB	1365783876	17	0
27	Locked	QAM256	27	837000000 Hz	-1.7 dBmV	42.0 dB	1365789028	12	0
28	Locked	QAM256	28	843000000 Hz	-2.2 dBmV	41.8 dB	1365792260	10	0
29	Locked	QAM256	45	429000000 Hz	4.0 dBmV	45.2 dB	1333037416	3	0
30	Locked	QAM256	30	855000000 Hz	-2.5 dBmV	41.6 dB	1365798789	12	0
31	Locked	QAM256	31	861000000 Hz	-3.1 dBmV	40.8 dB	1365799426	11	0
32	Locked	QAM256	32	867000000 Hz	-2.9 dBmV	41.3 dB	1365800819	3	0

<tabindex=-1>Upstream Bonded Channels (Partial Service)</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power
1	Locked	ATDMA	1	36800000 Hz	42.8 dBmV
2	Locked	ATDMA	2	30400000 Hz	42.8 dBmV
3	Locked	ATDMA	3	24000000 Hz	43.3 dBmV
4	Locked	ATDMA	4	17600000 Hz	43.5 dBmV
5	Locked	ATDMA	5	60000000 Hz	36.0 dBmV
6	Locked	ATDMA	6	67000000 Hz	37.5 dBmV
7	Locked	ATDMA	7	74000000 Hz	39.8 dBmV
8	Locked	ATDMA	8	81000000 Hz	35.3 dBmV

<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

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	159	300000000 Hz	2.5 dBmV	42.5 dB	1108 ~ 2987	3407239875	664915089	0
2	Not Locked	0	0	0 Hz	1.7 dBmV	0.0 dB	0 ~ 4095	0	0	0

<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>

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

FURRYe38
Guru - Experienced User
Jan 21, 2022
Power levels are all over the place.

https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311

Also seeing corrected code words which should all zeros. The ISP needs to check your service line.

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.
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://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
plemans
Guru - Experienced User
Jan 21, 2022
did you have the isp check the line?

your power for upstream isn't matching what your downstream is. And your downstream is out of spec.

did you check your own lines first with the recommendations from FURRYe38

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Slow upload speeds on my CM1000v2