CM1100 Intermittent internet issue with COX

sdchris · ‎2023-05-04

Hello all,

I have been having issues with my CM1100 disconnecting from the internet. I have had the modem for about 2 years and not sure how long the connection issue has been going on. I called Cox and of course everything on there end looks great and they blame the modem. So I wanted to post some of my logs and see if the power s/n ratio looks good. Thanks in advance for taking a look. 😁

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

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

Procedure	Status	Comment
Acquire Downstream Channel	237000000 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	45	237000000 Hz	11.4 dBmV	45.3 dB	143251340	2640	1507
2	Locked	QAM256	1	735000000 Hz	7.5 dBmV	42.4 dB	141409643	2115	638
3	Locked	QAM256	2	741000000 Hz	8.3 dBmV	42.9 dB	141414917	2122	561
4	Locked	QAM256	3	747000000 Hz	8.4 dBmV	42.9 dB	141418284	2070	573
5	Locked	QAM256	4	753000000 Hz	8.4 dBmV	42.9 dB	141422194	2173	542
6	Locked	QAM256	5	759000000 Hz	7.9 dBmV	42.6 dB	141425713	2072	534
7	Locked	QAM256	6	765000000 Hz	8.4 dBmV	42.9 dB	141430804	1934	516
8	Locked	QAM256	7	771000000 Hz	8.3 dBmV	42.8 dB	141434486	1991	513
9	Locked	QAM256	8	777000000 Hz	8.4 dBmV	43.0 dB	141438058	2020	494
10	Locked	QAM256	25	117000000 Hz	12.5 dBmV	44.5 dB	141442962	746	285
11	Locked	QAM256	26	123000000 Hz	12.6 dBmV	44.8 dB	141446910	882	280
12	Locked	QAM256	27	129000000 Hz	12.7 dBmV	44.9 dB	141450389	1015	307
13	Locked	QAM256	28	135000000 Hz	12.6 dBmV	44.5 dB	141452905	1613	1064
14	Locked	QAM256	29	141000000 Hz	12.3 dBmV	44.6 dB	141453165	1817	4162
15	Locked	QAM256	30	147000000 Hz	12.4 dBmV	44.8 dB	141457810	1637	3286
16	Locked	QAM256	31	153000000 Hz	12.2 dBmV	44.9 dB	141463110	1374	2212
17	Locked	QAM256	32	159000000 Hz	12.2 dBmV	45.1 dB	141467612	1521	1334
18	Locked	QAM256	33	165000000 Hz	12.1 dBmV	45.1 dB	141471867	1098	1111
19	Locked	QAM256	34	171000000 Hz	11.8 dBmV	45.1 dB	141474489	1974	1284
20	Locked	QAM256	35	177000000 Hz	12.1 dBmV	45.3 dB	129954113	2459	336
21	Locked	QAM256	36	183000000 Hz	11.9 dBmV	45.1 dB	141480873	2998	1348
22	Locked	QAM256	37	189000000 Hz	11.7 dBmV	45.2 dB	141484595	2805	1051
23	Locked	QAM256	38	195000000 Hz	11.3 dBmV	45.1 dB	141490194	1597	859
24	Locked	QAM256	39	201000000 Hz	11.3 dBmV	45.1 dB	141494868	1077	640
25	Locked	QAM256	40	207000000 Hz	11.2 dBmV	45.2 dB	141497954	1257	427
26	Locked	QAM256	41	213000000 Hz	11.3 dBmV	45.1 dB	141502268	1384	259
27	Locked	QAM256	42	219000000 Hz	11.1 dBmV	45.0 dB	141505944	1306	288
28	Locked	QAM256	43	225000000 Hz	11.1 dBmV	45.1 dB	141509352	1365	298
29	Locked	QAM256	44	231000000 Hz	11.2 dBmV	45.3 dB	141513150	1409	302
30	Locked	QAM256	46	243000000 Hz	11.6 dBmV	45.3 dB	141511526	1795	1623
31	Locked	QAM256	47	249000000 Hz	11.7 dBmV	45.2 dB	141514186	1555	1116
32	Locked	QAM256	48	255000000 Hz	12.0 dBmV	45.2 dB	141513880	1458	492

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

Channel	Lock Status	Modulation	Channel ID	Frequency	Power
1	Locked	ATDMA	1	17600000 Hz	48.3 dBmV
2	Locked	ATDMA	2	24000000 Hz	48.3 dBmV
3	Locked	ATDMA	3	30400000 Hz	48.8 dBmV
4	Locked	ATDMA	4	36800000 Hz	49.5 dBmV
5	Not Locked	Unknown	0	0 Hz	0.0 dBmV
6	Not Locked	Unknown	0	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Hz	0.0 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	159	300000000 Hz	12.2 dBmV	42.8 dB	296 ~ 7895	459227490	5046213	364
2	Locked	0, 1, 2, 3	160	918000000 Hz	4.5 dBmV	37.8 dB	1108 ~ 2987	177785436	77737124	1434

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

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	3, 4, 9, 10, 11, 12, 13	6	36800000 Hz	48.5 dBmV
2	Not Locked	3, 4, 9, 10, 11, 12, 13	0	0 Hz	0.0 dBmV

FURRYe38 · ‎2023-05-05

Power levels are way too high:

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

Any Criticals, Errors or Warnings needs to be reviewed by the ISP and resolved and power turned down up to the modem:

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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
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-Mod...
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

View solution in original post

sdchris · ‎2023-05-04

Here are the latest logs:

2023-05-04, 13:54:08	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=bc:a5:11:d3:c7:ec;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:54:05	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:54:04	Notice (6)	CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=XXX;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:54:01	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:54:00	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=XXX;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:53:55	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;MAC=XXX;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:53:54	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=bc:a5:11:d3:c7:ec;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:53:51	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:52:33	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: 1; New Profile: 1 2 3.;CM-MAC=bc:a5:11:d3:c7:ec;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:52:15	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:52:12	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:52:12	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:51:32	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=bc:a5:11:d3:c7:ec;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:51:31	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:51:23	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:51:19	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:49	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:43	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:41	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=bc:a5:11:d3:c7:ec;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:40	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:37	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:35	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:33	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=bc:a5:11:d3:c7:ec;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:32	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:50:32	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:54	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:53	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:49	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:48	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:40	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:39	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:32	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:30	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:14	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:05	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:49:05	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:48:56	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:48:54	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:48:52	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 13:48:52	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;

Here is the log from the last time the internet went down earlier today:

2023-05-04, 11:05:02	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:04:34	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:04:19	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:03:49	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:03:49	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Warning (5)	Dynamic Range Window violation
2023-05-04, 11:02:49	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Warning (5)	Dynamic Range Window violation
2023-05-04, 11:02:49	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Warning (5)	Dynamic Range Window violation
2023-05-04, 11:02:49	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Warning (5)	Dynamic Range Window violation
2023-05-04, 11:02:49	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:49	Warning (5)	Dynamic Range Window violation
2023-05-04, 11:02:49	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:45	Notice (6)	DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:43	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:38	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-04, 11:02:38	Warning (5)	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Notice (6)	Honoring MDD; IP provisioning mode = IPv4
Time Not Established	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Critical (3)	UCD invalid or channel unusable;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;

FURRYe38 · ‎2023-05-04

Power levels are too high:

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

ISP needs to bring them down.

Lots of Correctables and Un-Correctables that should be zeros.

Lots of criticals and warnings that the ISP needs to review and resolve:

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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

sdchris · ‎2023-05-04

Thanks I will give them a call.

FURRYe38 · ‎2023-05-05

Let us know how it turns out.

sdchris · ‎2023-05-05

I connected the modem outside directly to the coax coming from the street and bypassed a splitter and here are the numbers:

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

Procedure	Status	Comment
Acquire Downstream Channel	237000000 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 (Partial Service)</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR / MER	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	QAM256	45	237000000 Hz	15.3 dBmV	44.5 dB	36098425	149	24
2	Locked	QAM256	1	735000000 Hz	15.7 dBmV	43.6 dB	33903906	408	6
3	Locked	QAM256	2	741000000 Hz	16.0 dBmV	43.8 dB	33908284	332	4
4	Locked	QAM256	3	747000000 Hz	16.0 dBmV	43.9 dB	33911752	355	12
5	Locked	QAM256	4	753000000 Hz	15.9 dBmV	43.8 dB	33915559	336	4
6	Locked	QAM256	5	759000000 Hz	15.7 dBmV	43.6 dB	33919459	279	0
7	Locked	QAM256	6	765000000 Hz	15.5 dBmV	43.5 dB	33922634	299	3
8	Locked	QAM256	7	771000000 Hz	15.8 dBmV	43.6 dB	33927371	244	3
9	Locked	QAM256	8	777000000 Hz	15.8 dBmV	43.8 dB	33930947	237	0
10	Locked	QAM256	25	117000000 Hz	14.4 dBmV	43.2 dB	33934887	13	0
11	Locked	QAM256	26	123000000 Hz	14.7 dBmV	43.2 dB	33938564	33	0
12	Locked	QAM256	27	129000000 Hz	14.8 dBmV	43.3 dB	33942402	18	0
13	Locked	QAM256	28	135000000 Hz	14.7 dBmV	43.3 dB	33945838	125	0
14	Locked	QAM256	29	141000000 Hz	14.5 dBmV	43.2 dB	33948993	554	54
15	Locked	QAM256	30	147000000 Hz	14.7 dBmV	43.6 dB	33952432	508	259
16	Locked	QAM256	31	153000000 Hz	14.6 dBmV	43.8 dB	33956375	433	361
17	Locked	QAM256	32	159000000 Hz	14.7 dBmV	43.9 dB	33960634	540	66
18	Locked	QAM256	33	165000000 Hz	14.7 dBmV	43.9 dB	33964201	260	405
19	Locked	QAM256	34	171000000 Hz	14.6 dBmV	43.8 dB	33968354	174	459
20	Locked	QAM256	35	177000000 Hz	14.9 dBmV	44.1 dB	33972087	141	472
21	Locked	QAM256	36	183000000 Hz	14.8 dBmV	44.2 dB	33975932	138	473
22	Locked	QAM256	37	189000000 Hz	14.7 dBmV	44.2 dB	33978681	148	461
23	Locked	QAM256	38	195000000 Hz	14.5 dBmV	44.0 dB	33983423	154	429
24	Locked	QAM256	39	201000000 Hz	14.7 dBmV	44.3 dB	33987229	361	201
25	Locked	QAM256	40	207000000 Hz	14.9 dBmV	44.3 dB	33991252	170	31
26	Locked	QAM256	41	213000000 Hz	15.1 dBmV	44.2 dB	33994783	76	36
27	Locked	QAM256	42	219000000 Hz	14.8 dBmV	44.2 dB	33998955	55	38
28	Locked	QAM256	43	225000000 Hz	15.0 dBmV	44.3 dB	34002396	47	37
29	Locked	QAM256	44	231000000 Hz	15.1 dBmV	44.3 dB	34006366	46	36
30	Locked	QAM256	46	243000000 Hz	15.3 dBmV	44.5 dB	34006401	187	2
31	Locked	QAM256	47	249000000 Hz	15.3 dBmV	44.3 dB	34007603	210	0
32	Locked	QAM256	48	255000000 Hz	15.4 dBmV	44.4 dB	34007090	147	2

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

Channel	Lock Status	Modulation	Channel ID	Frequency	Power
1	Locked	ATDMA	1	17600000 Hz	45.5 dBmV
2	Locked	ATDMA	2	24000000 Hz	45.5 dBmV
3	Locked	ATDMA	3	30400000 Hz	46.0 dBmV
4	Locked	ATDMA	4	36800000 Hz	45.8 dBmV
5	Not Locked	Unknown	0	0 Hz	0.0 dBmV
6	Not Locked	Unknown	0	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Hz	0.0 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	15.3 dBmV	42.3 dB	296 ~ 7895	130273818	3964244	395
2	Locked	0, 1, 2, 3	160	918000000 Hz	13.4 dBmV	41.0 dB	1108 ~ 2987	37576456	6917188	285

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

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	3, 4, 9, 10, 11, 12, 13	6	36800000 Hz	40.8 dBmV
2	Not Locked	3, 4, 9, 10, 11, 12, 13	0	0 Hz	0.0 dBmV

sdchris · ‎2023-05-05

Here is the latest log:

Time	Priority	Description
2023-05-05, 09:27:53	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:33	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:32	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:28	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:27	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:26	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:25	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:19	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:16	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:16	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:27:16	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:26:54	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:26:27	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:57	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:57	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:21:57	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:54	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:53	Notice (6)	CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: �; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:52	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:52	Warning (5)	Unicast DSID PSN startup error
2023-05-05, 09:21:52	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:21:52	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:20:52	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:20:52	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:20:52	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:20:52	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:52	Warning (5)	Dynamic Range Window violation
2023-05-05, 09:20:52	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:47	Notice (6)	DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:46	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:41	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
2023-05-05, 09:20:40	Warning (5)	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Notice (6)	Honoring MDD; IP provisioning mode = IPv4
Time Not Established	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	Critical (3)	UCD invalid or channel unusable;CM-MAC=XXX;CM-MAC=XXX;CM-QOS=1.1;CM-VER=3.1;

FURRYe38 · ‎2023-05-05

Power levels are way too high:

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

Any Criticals, Errors or Warnings needs to be reviewed by the ISP and resolved and power turned down up to the modem:

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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
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-Mod...
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

sdchris · ‎2023-05-09

A cox tech was able to come out and reduce the signal. Thanks for everyone's suggestions.

FURRYe38 · ‎2023-05-09

So is the CM working now?

sdchris · ‎2023-05-09

Yes. All the errors are now cleared up and no more packet loss. Thanks again.

FURRYe38 · ‎2023-05-09

👍

CM1100 Intermittent internet issue with COX

CM1100 Intermittent internet issue with COX

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