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Constant error codes with modem rebooting: Resetting the cable modem due to docsDevResetNow

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Constant error codes with modem rebooting: Resetting the cable modem due to docsDevResetNow

This problem has been persisting for a while now - going on 3 months. My internet speeds have been perfectly fine, around 300 mb down, but the modem reboots itself constantly over the span of hours and I end up being out internet for days until a tech comes out.

 

I got a new modem (Netgear CM1100) as well as a new router. I've gotten 4 techs to come out to replace connectors, etc. I even got a new coaxial cable (which the 4th tech said was "clean"). He requested a tech assist to replace my drop line just yesterday, but my modem started rebooting again at 6pm and now my internet goes in and out.

 

I checked the Event Log from my modem and I see errors with a lot of T3 and T4 timeouts as well as Resetting the cable modem due to docsDevResetNow:

 

2020-09-04, 21:32:25Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-09-03, 13:41:53Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-09-03, 09:37:06Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-09-03, 09:37:01Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=bc:a5:11:8b:29:2c;CMTS-MAC=00:01:5c:66:98:59;CM-QOS=1.1;CM-VER=3.1;

 

I have a 5th tech coming tomorrow, but I have no confidence he is going to permantly fix my problem given that it's good for a day before the modem reboots again.

 

Here are my modem stats:

 

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

ProcedureStatusComment
Acquire Downstream Channel525000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnableBPI+
IP Provisioning ModeHonor MDDIPv6 only

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

ChannelLock StatusModulationChannel IDFrequencyPowerSNR / MERUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1LockedQAM25620525000000 Hz7.7 dBmV43.2 dB1413014200
2LockedQAM25617507000000 Hz7.4 dBmV43.3 dB1305867300
3LockedQAM25618513000000 Hz7.5 dBmV43.0 dB1306182900
4LockedQAM25619519000000 Hz7.6 dBmV43.1 dB1306541300
5LockedQAM25621531000000 Hz7.7 dBmV43.2 dB1306906400
6LockedQAM25622537000000 Hz7.9 dBmV43.0 dB1307280500
7LockedQAM25623543000000 Hz8.1 dBmV43.2 dB1307665500
8LockedQAM25624549000000 Hz8.3 dBmV43.0 dB1308014900
9LockedQAM25625555000000 Hz8.3 dBmV43.1 dB1308401400
10LockedQAM25626561000000 Hz8.3 dBmV43.0 dB1308786500
11LockedQAM25627567000000 Hz8.5 dBmV43.2 dB1309160100
12LockedQAM25628573000000 Hz8.7 dBmV43.2 dB1309543200
13LockedQAM25629579000000 Hz8.6 dBmV43.2 dB1309904600
14LockedQAM25630585000000 Hz8.6 dBmV43.1 dB1310315300
15LockedQAM25631591000000 Hz8.7 dBmV43.0 dB1310666200
16LockedQAM25632597000000 Hz8.9 dBmV43.1 dB1311050700
17LockedQAM25633603000000 Hz8.8 dBmV42.9 dB1311407900
18LockedQAM25634609000000 Hz8.8 dBmV42.8 dB1311796700
19LockedQAM25635615000000 Hz9.0 dBmV43.0 dB1312175600
20LockedQAM25636621000000 Hz8.9 dBmV43.2 dB1312520200
21LockedQAM25637627000000 Hz8.9 dBmV43.0 dB1312921100
22LockedQAM25638633000000 Hz9.0 dBmV43.0 dB1313298600
23LockedQAM25639639000000 Hz8.9 dBmV42.8 dB1313670400
24LockedQAM25640645000000 Hz9.1 dBmV43.0 dB1314021800
25LockedQAM25641651000000 Hz9.0 dBmV42.8 dB1314377800
26LockedQAM25642657000000 Hz8.9 dBmV42.7 dB1314769100
27LockedQAM25643663000000 Hz8.7 dBmV42.5 dB1315146400
28LockedQAM25644669000000 Hz8.6 dBmV42.7 dB1315523600
29LockedQAM25645675000000 Hz8.6 dBmV42.5 dB1315897500
30LockedQAM25646681000000 Hz8.6 dBmV42.9 dB1316132700
31LockedQAM25647687000000 Hz8.9 dBmV42.8 dB1316215800
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB000

Upstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPower
1LockedATDMA5717300000 Hz43.5 dBmV
2LockedATDMA5823700000 Hz41.5 dBmV
3LockedATDMA5930300000 Hz41.5 dBmV
4LockedATDMA6036700000 Hz41.3 dBmV
5Not LockedUnknown00 Hz0.0 dBmV
6Not LockedUnknown00 Hz0.0 dBmV
7Not LockedUnknown00 Hz0.0 dBmV
8Not LockedUnknown00 Hz0.0 dBmV

Downstream OFDM Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1Locked0, 1, 2, 3, 25548850000000 Hz5.0 dBmV39.8 dB1108 ~ 298731393040272997840
2Not Locked0, 25500 Hz4.7 dBmV0.0 dB0 ~ 4095000

Upstream OFDMA Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not LockedUnknown00 Hz0 dBmV
2Not LockedUnknown00 Hz0 dBmV

Also, I noticed that my modem firmware was on V6.01.07, which is what is Comcast deployed based on this URL: https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-mod...

 

But now it's on V2.01.02? (This is the current firmware after the latest reboot)

 

What else could be causing this given that all my equipment is new (modem, router, coaxial) as well as a new drop?

 

Could this be a node, plant issue that needs esclation?