Hello.I was wondering if anyone is experiencing an issue with Netgear CM2000 cable modem on Xfinity.My downstream light will blink white. I do not have any connection issues, but I notice the following on the logs: TimePriorityDescriptionTue Mar 30 11:05:14 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;Tue Mar 30 11:04:41 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;Tue Mar 30 09:17:03 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;Tue Mar 30 09:16:28 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=00:01:5c:71:9e:7c;CM-QOS=1.1;CM-VER=3.1;Tue Mar 30 09:07:53 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;Tue Mar 30 09:07:25 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1; Here is my channel info: Startup ProcedureProcedureStatusCommentAcquire Downstream Channel507000000 HzLockedConnectivity StateOKOperationalBoot StateOKOperationalSecurityEnabledBPI+ Downstream Bonded ChannelsChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables1LockedQAM2565507000000 Hz-2.5 dBmV40.6 dB002LockedQAM2562489000000 Hz-2.0 dBmV40.7 dB003LockedQAM2563495000000 Hz-2.0 dBmV40.7 dB004LockedQAM2564501000000 Hz-2.1 dBmV40.7 dB005LockedQAM2566513000000 Hz-2.7 dBmV40.5 dB006LockedQAM2567519000000 Hz-2.9 dBmV40.4 dB007LockedQAM2568525000000 Hz-2.9 dBmV40.5 dB008LockedQAM2569531000000 Hz-2.9 dBmV40.5 dB009LockedQAM25610537000000 Hz-3.0 dBmV40.4 dB0010LockedQAM25611543000000 Hz-3.1 dBmV40.4 dB0011LockedQAM25612549000000 Hz-3.3 dBmV40.2 dB0012LockedQAM25613555000000 Hz-3.4 dBmV40.2 dB0013LockedQAM25614561000000 Hz-3.3 dBmV40.2 dB0014LockedQAM25615567000000 Hz-3.4 dBmV40.0 dB0015LockedQAM25616573000000 Hz-3.4 dBmV40.0 dB0016LockedQAM25617579000000 Hz-3.6 dBmV40.0 dB0017LockedQAM25618585000000 Hz-3.9 dBmV39.9 dB0018LockedQAM25619591000000 Hz-4.0 dBmV39.8 dB0019LockedQAM25620597000000 Hz-3.9 dBmV39.9 dB0020LockedQAM25621603000000 Hz-3.9 dBmV39.9 dB0021LockedQAM25622609000000 Hz-3.9 dBmV39.9 dB0022LockedQAM25623615000000 Hz-3.8 dBmV39.9 dB0023LockedQAM25624621000000 Hz-3.5 dBmV40.0 dB0024LockedQAM25625627000000 Hz-3.2 dBmV40.2 dB0025LockedQAM25626633000000 Hz-2.8 dBmV40.3 dB0026LockedQAM25627639000000 Hz-2.9 dBmV40.1 dB0027LockedQAM25628645000000 Hz-2.8 dBmV40.1 dB0028LockedQAM25629651000000 Hz-2.9 dBmV40.2 dB0029LockedQAM25630657000000 Hz-2.9 dBmV40.2 dB0030LockedQAM25631663000000 Hz-3.0 dBmV40.1 dB0031LockedQAM25632669000000 Hz-3.0 dBmV40.1 dB0032Not LockedUnknown00 Hz0.0 dBmV0.0 dB00 Upstream Bonded ChannelsChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower1LockedATDMA1512035600000 Hz48.0 dBmV2LockedATDMA2512029200000 Hz46.8 dBmV3LockedATDMA3512022800000 Hz46.8 dBmV4LockedATDMA4512016400000 Hz45.8 dBmV5LockedATDMA5256040400000 Hz47.3 dBmV6Not LockedUnknown000 Hz0.0 dBmV7Not LockedUnknown000 Hz0.0 dBmV8Not LockedUnknown000 Hz0.0 dBmV Downstream OFDM ChannelsChannelLockStatusModulation /Profile IDChannelIDFrequencyPowerSNR /MERActive SubcarrierNumber RangeUnerroredCodewordsCorrectableCodewordsUncorrectableCodewords1Locked0 ,1 ,2 ,337690000000 Hz-2.5 dBmV39.8 dB1228 ~ 286735465831435377240722Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000 Upstream OFDMA ChannelsChannelLock StatusModulation / Profile IDChannel IDFrequencyPower1Not Locked000 Hz0 dBmV2Not Locked000 Hz0 dBmV

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 them back ON.https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853https://highspeed.tips/docsis-events/

Your power levels look good and you don't have much for errors. Your log indicates an issue with channel 37 (the ofdma channel). Code 20/22 indicates fec errors and resetting. That could cause the downstream to blink as it searches to reconnect channel 37.If its not causing a reduction in speed or issues, I wouldn't worry about it. If you are running into issues, then see what FURRYe38 advised.

I would love a response to my thread about the issues I am having with this modem. I have provided log screenshots in the thread. My downstream light constantly blinks as well.

Any progress on this? Taurus2313 wrote:I would love a response to my thread about the issues I am having with this modem. I have provided log screenshots in the thread. My downstream light constantly blinks as well.

Puch96

Guide

Mar 30, 2021

CM2000 blinking downstream light issue with log events

Hello.

I was wondering if anyone is experiencing an issue with Netgear CM2000 cable modem on Xfinity.

My downstream light will blink white. I do not have any connection issues, but I notice the following on the logs:

Time	Priority	Description
Tue Mar 30 11:05:14 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 11:04:41 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:17:03 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:16:28 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=00:01:5c:71:9e:7c;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:07:53 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:07:25 2021	(Notice (6))	CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;

Here is my channel info:

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	5	507000000 Hz	-2.5 dBmV	40.6 dB	0	0
2	Locked	QAM256	2	489000000 Hz	-2.0 dBmV	40.7 dB	0	0
3	Locked	QAM256	3	495000000 Hz	-2.0 dBmV	40.7 dB	0	0
4	Locked	QAM256	4	501000000 Hz	-2.1 dBmV	40.7 dB	0	0
5	Locked	QAM256	6	513000000 Hz	-2.7 dBmV	40.5 dB	0	0
6	Locked	QAM256	7	519000000 Hz	-2.9 dBmV	40.4 dB	0	0
7	Locked	QAM256	8	525000000 Hz	-2.9 dBmV	40.5 dB	0	0
8	Locked	QAM256	9	531000000 Hz	-2.9 dBmV	40.5 dB	0	0
9	Locked	QAM256	10	537000000 Hz	-3.0 dBmV	40.4 dB	0	0
10	Locked	QAM256	11	543000000 Hz	-3.1 dBmV	40.4 dB	0	0
11	Locked	QAM256	12	549000000 Hz	-3.3 dBmV	40.2 dB	0	0
12	Locked	QAM256	13	555000000 Hz	-3.4 dBmV	40.2 dB	0	0
13	Locked	QAM256	14	561000000 Hz	-3.3 dBmV	40.2 dB	0	0
14	Locked	QAM256	15	567000000 Hz	-3.4 dBmV	40.0 dB	0	0
15	Locked	QAM256	16	573000000 Hz	-3.4 dBmV	40.0 dB	0	0
16	Locked	QAM256	17	579000000 Hz	-3.6 dBmV	40.0 dB	0	0
17	Locked	QAM256	18	585000000 Hz	-3.9 dBmV	39.9 dB	0	0
18	Locked	QAM256	19	591000000 Hz	-4.0 dBmV	39.8 dB	0	0
19	Locked	QAM256	20	597000000 Hz	-3.9 dBmV	39.9 dB	0	0
20	Locked	QAM256	21	603000000 Hz	-3.9 dBmV	39.9 dB	0	0
21	Locked	QAM256	22	609000000 Hz	-3.9 dBmV	39.9 dB	0	0
22	Locked	QAM256	23	615000000 Hz	-3.8 dBmV	39.9 dB	0	0
23	Locked	QAM256	24	621000000 Hz	-3.5 dBmV	40.0 dB	0	0
24	Locked	QAM256	25	627000000 Hz	-3.2 dBmV	40.2 dB	0	0
25	Locked	QAM256	26	633000000 Hz	-2.8 dBmV	40.3 dB	0	0
26	Locked	QAM256	27	639000000 Hz	-2.9 dBmV	40.1 dB	0	0
27	Locked	QAM256	28	645000000 Hz	-2.8 dBmV	40.1 dB	0	0
28	Locked	QAM256	29	651000000 Hz	-2.9 dBmV	40.2 dB	0	0
29	Locked	QAM256	30	657000000 Hz	-2.9 dBmV	40.2 dB	0	0
30	Locked	QAM256	31	663000000 Hz	-3.0 dBmV	40.1 dB	0	0
31	Locked	QAM256	32	669000000 Hz	-3.0 dBmV	40.1 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	35600000 Hz	48.0 dBmV
2	Locked	ATDMA	2	5120	29200000 Hz	46.8 dBmV
3	Locked	ATDMA	3	5120	22800000 Hz	46.8 dBmV
4	Locked	ATDMA	4	5120	16400000 Hz	45.8 dBmV
5	Locked	ATDMA	5	2560	40400000 Hz	47.3 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	37	690000000 Hz	-2.5 dBmV	39.8 dB	1228 ~ 2867	354658314	353772407	2
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

CM2000 blinking downstream light issue with log events

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