Netgear CM2000 modem keeps dropping internet speed from 100 to 10 MBPS

Aspirant

Nov 10, 2021

I see some other data in the logs as well:

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	507000000 Hz	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	QAM256	20	507000000 Hz	4.7 dBmV	40.7 dB	0	0
2	Locked	QAM256	17	483000000 Hz	4.5 dBmV	40.7 dB	0	0
3	Locked	QAM256	18	489000000 Hz	4.6 dBmV	40.6 dB	0	0
4	Locked	QAM256	19	495000000 Hz	4.6 dBmV	40.7 dB	0	0
5	Locked	QAM256	21	513000000 Hz	4.7 dBmV	40.8 dB	0	0
6	Locked	QAM256	22	519000000 Hz	4.8 dBmV	40.8 dB	0	0
7	Locked	QAM256	23	525000000 Hz	5.0 dBmV	40.8 dB	0	0
8	Locked	QAM256	24	531000000 Hz	5.1 dBmV	40.9 dB	0	0
9	Locked	QAM256	25	543000000 Hz	5.0 dBmV	40.8 dB	0	0
10	Locked	QAM256	26	549000000 Hz	4.9 dBmV	40.8 dB	0	0
11	Locked	QAM256	27	555000000 Hz	4.8 dBmV	40.9 dB	0	0
12	Locked	QAM256	28	561000000 Hz	4.7 dBmV	40.9 dB	0	0
13	Locked	QAM256	29	567000000 Hz	4.4 dBmV	40.7 dB	0	0
14	Locked	QAM256	30	573000000 Hz	3.7 dBmV	40.4 dB	0	0
15	Locked	QAM256	31	579000000 Hz	2.7 dBmV	40.0 dB	0	0
16	Locked	QAM256	32	585000000 Hz	1.9 dBmV	39.6 dB	0	0
17	Locked	QAM256	33	591000000 Hz	1.8 dBmV	39.8 dB	0	0
18	Locked	QAM256	34	597000000 Hz	3.0 dBmV	40.2 dB	0	0
19	Locked	QAM256	35	603000000 Hz	3.9 dBmV	40.5 dB	0	0
20	Locked	QAM256	36	609000000 Hz	4.8 dBmV	40.8 dB	0	0
21	Locked	QAM256	37	615000000 Hz	5.3 dBmV	40.9 dB	0	0
22	Locked	QAM256	38	621000000 Hz	5.3 dBmV	40.9 dB	0	0
23	Locked	QAM256	39	627000000 Hz	5.4 dBmV	40.9 dB	0	0
24	Locked	QAM256	40	633000000 Hz	5.7 dBmV	40.9 dB	0	0
25	Locked	QAM256	41	639000000 Hz	5.9 dBmV	40.9 dB	0	0
26	Locked	QAM256	42	645000000 Hz	6.3 dBmV	41.1 dB	0	0
27	Locked	QAM256	43	651000000 Hz	6.3 dBmV	40.9 dB	0	0
28	Locked	QAM256	44	657000000 Hz	6.5 dBmV	41.0 dB	0	0
29	Locked	QAM256	45	663000000 Hz	6.8 dBmV	41.1 dB	0	0
30	Locked	QAM256	46	669000000 Hz	7.3 dBmV	41.2 dB	0	0
31	Locked	QAM256	47	675000000 Hz	6.8 dBmV	40.8 dB	0	0
32	Not Locked	Unknown	0	0 Hz	0.0 dBmV	0.0 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	1	5120	16400000 Hz	45.3 dBmV
2	Locked	ATDMA	2	5120	22800000 Hz	46.3 dBmV
3	Locked	ATDMA	3	5120	29200000 Hz	46.3 dBmV
4	Locked	ATDMA	4	5120	35600000 Hz	46.8 dBmV
5	Locked	ATDMA	5	1280	39600000 Hz	43.5 dBmV
6	Not Locked	Unknown	0	0	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0	0 Hz	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	48	688000000 Hz	6.8 dBmV	40.5 dB	1108 ~ 2987	7338633	7031821	0
2	Not Locked	0	0	0 Hz	0 dBmV	0.0 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

Forum Discussion

Netgear CM2000 modem keeps dropping internet speed from 100 to 10 MBPS