Forum Discussion

Aspirant

Oct 28, 2022

Solved

Netgear CM2050V connection type

I have been using a Netgear C7100V DOCSIS3.0 modem for several years and have found find that it consistently runs at about 10% of the rates that Comcast hypes to me. I borrowed an Arris SURFboard SB...

FURRYe38
Oct 28, 2022
Yes, criticals needs to be reviewed by the ISP and resolved with there help.

I see some correct and un-correctables but not really enough to be worried about.
Check all cabling and coas line fittings and besure they are snug.

Power is a tad bit high. MIght ask the ISP if they could lower it some maybe.

CAT5 IS NOT rated for 1000Mbps, You should be using CAT6 UTP between the modem and RBR and RBR to RBS if they are ethernet connected. IF you had the 8 series, then you would use CAT6A STP between the modem and RBR.

FURRYe38

Guru - Experienced User

Oct 28, 2022

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router

Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected 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-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

GFT

Aspirant

Oct 28, 2022

I've using the same cables with both the SB8200 and the CM2050V, I just pulled one out and inserted the other. The Coax is from Comcast, labeled "TFC-T10" and "6 series". I don't know how to interpret those.

The LAN cable between the modem (on one end of the house) and router (an Orbi RBR750 in the middle of the house) has a pair of connectors and 10+ meters of cat5 cable behind the wall. The other runs in the house (including some that are twice as long) seem to support 1000baseT. The transfers between computers with wired connections are definitely faster than using WiFi (when I unplug their cables and use WiFi the data rate drops 5 to 10x). While I could see this cabling impacting the speed test, I wouldn't expect the cat5 cables to impact the communications from the cable head to the modem. And all of this wiring was used with both the SB8200 and the CM2050V. That routing also was in place before the Orbi was installed. I could move the router to the wiring closet with the modem and rearrange the satellites, but I'll connect a computer directly to the modem and test that before I take that step.

The Modem Status is:

Cable Connection

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

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	13	507000000 Hz	5.2 dBmV	40.6 dB	4	0
2	Locked	QAM256	1	417000000 Hz	5.8 dBmV	41.6 dB	1	0
3	Locked	QAM256	2	423000000 Hz	5.6 dBmV	41.5 dB	1	0
4	Locked	QAM256	3	435000000 Hz	5.9 dBmV	41.6 dB	1	0
5	Locked	QAM256	4	447000000 Hz	5.7 dBmV	41.3 dB	3	0
6	Locked	QAM256	5	453000000 Hz	6.0 dBmV	41.5 dB	1	0
7	Locked	QAM256	6	459000000 Hz	5.6 dBmV	41.2 dB	1	0
8	Locked	QAM256	7	465000000 Hz	6.0 dBmV	41.4 dB	1	0
9	Locked	QAM256	8	471000000 Hz	6.0 dBmV	41.3 dB	2	0
10	Locked	QAM256	9	477000000 Hz	5.9 dBmV	40.9 dB	2	0
11	Locked	QAM256	10	483000000 Hz	6.2 dBmV	41.1 dB	1	0
12	Locked	QAM256	11	489000000 Hz	5.8 dBmV	40.8 dB	1	0
13	Locked	QAM256	12	495000000 Hz	5.8 dBmV	40.8 dB	2	0
14	Locked	QAM256	14	513000000 Hz	4.6 dBmV	40.3 dB	1	0
15	Locked	QAM256	15	519000000 Hz	3.6 dBmV	39.7 dB	2	0
16	Locked	QAM256	16	525000000 Hz	2.2 dBmV	38.9 dB	2	0
17	Locked	QAM256	17	531000000 Hz	5.4 dBmV	40.5 dB	1	0
18	Locked	QAM256	18	537000000 Hz	6.9 dBmV	41.2 dB	1	0
19	Locked	QAM256	19	543000000 Hz	7.2 dBmV	41.1 dB	1	0
20	Locked	QAM256	20	549000000 Hz	7.3 dBmV	41.3 dB	2	0
21	Locked	QAM256	21	555000000 Hz	6.9 dBmV	40.9 dB	1	0
22	Locked	QAM256	22	561000000 Hz	7.0 dBmV	40.8 dB	3	0
23	Locked	QAM256	23	567000000 Hz	7.5 dBmV	41.0 dB	1	0
24	Locked	QAM256	24	573000000 Hz	7.2 dBmV	40.6 dB	4	0
25	Locked	QAM256	25	579000000 Hz	7.5 dBmV	40.7 dB	0	0
26	Locked	QAM256	26	585000000 Hz	7.4 dBmV	40.5 dB	0	0
27	Locked	QAM256	27	591000000 Hz	7.3 dBmV	40.3 dB	1	0
28	Locked	QAM256	28	597000000 Hz	7.6 dBmV	40.5 dB	1	0
29	Locked	QAM256	29	603000000 Hz	7.0 dBmV	40.0 dB	2	0
30	Locked	QAM256	30	609000000 Hz	7.0 dBmV	40.0 dB	2	0
31	Locked	QAM256	31	615000000 Hz	6.9 dBmV	40.0 dB	0	0
32	Locked	QAM256	32	621000000 Hz	6.8 dBmV	39.8 dB	5	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	9	2560	10400000 Hz	34.8 dBmV
2	Locked	ATDMA	10	5120	16400000 Hz	34.3 dBmV
3	Locked	ATDMA	11	5120	22800000 Hz	34.3 dBmV
4	Locked	ATDMA	12	5120	29200000 Hz	34.8 dBmV
5	Locked	ATDMA	13	5120	35600000 Hz	34.8 dBmV
6	Locked	ATDMA	14	2560	40400000 Hz	34.8 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	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	722000000 Hz	9.7 dBmV	40.0 dB	1186 ~ 2909	28012965	21868427	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

Current System Time:Fri Oct 28 11:47:06 2022

System Up Time:00:16:48

The event log has lots of warnings and 6 critical entries. There are at least 3 power up events in there. It's also too long to post in this message so I'll put it in another reply.

GFT

Aspirant

Oct 28, 2022

Event Log

Time	Priority	Description
Fri Oct 28 11:43:23 2022	(Warning (5))	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:43:21 2022	(Critical (3))	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:31:25 2022	(Notice (6))	CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:31:15 2022	(Warning (5))	Dynamic Range Window violation
Fri Oct 28 11:31:15 2022	(Warning (5))	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:31:15 2022	(Warning (5))	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:31:10 2022	(Notice (6))	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 11:31:05 2022	(Notice (6))	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	(Notice (6))	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	(Critical (3))	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:22:14 2022	(Warning (5))	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:22:12 2022	(Critical (3))	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:10:15 2022	(Notice (6))	CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:10:07 2022	(Warning (5))	Dynamic Range Window violation
Fri Oct 28 10:10:07 2022	(Warning (5))	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:10:06 2022	(Warning (5))	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:10:01 2022	(Notice (6))	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 10:09:56 2022	(Notice (6))	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	(Notice (6))	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	(Critical (3))	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:32:14 2022	(Warning (5))	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:32:12 2022	(Critical (3))	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:20:16 2022	(Notice (6))	CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:20:08 2022	(Warning (5))	Dynamic Range Window violation
Fri Oct 28 09:20:08 2022	(Warning (5))	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:20:08 2022	(Warning (5))	Dynamic Range Window violation
Fri Oct 28 09:20:08 2022	(Warning (5))	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:20:08 2022	(Warning (5))	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:20:03 2022	(Notice (6))	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:19:58 2022	(Notice (6))	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	(Notice (6))	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	(Critical (3))	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:14:02 2022	(Notice (6))	CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:13:53 2022	(Warning (5))	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:13:47 2022	(Notice (6))	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:13:42 2022	(Notice (6))	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=dc:eb:94:b5:45:5d;CM-QOS=1.1;CM-VER=3.1;
Time Not Established	(Notice (6))	Honoring MDD; IP provisioning mode = IPv6
Time Not Established	(Critical (3))	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b3:55:30;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 28 09:12:25 2022	(Notice (6))	SW download Successful - Via Config file
Fri Oct 28 09:11:23 2022	(Notice (6))	SW Download INIT - Via Config file d11_v_cm2050vims_walledgarden.cm

FURRYe38
Guru - Experienced User
Oct 28, 2022
Yes, criticals needs to be reviewed by the ISP and resolved with there help.

I see some correct and un-correctables but not really enough to be worried about.
Check all cabling and coas line fittings and besure they are snug.

Power is a tad bit high. MIght ask the ISP if they could lower it some maybe.

CAT5 IS NOT rated for 1000Mbps, You should be using CAT6 UTP between the modem and RBR and RBR to RBS if they are ethernet connected. IF you had the 8 series, then you would use CAT6A STP between the modem and RBR.
- GFT
  Aspirant
  Oct 28, 2022
  I agree that cat5 is not rated for 1000baseT, but it seems that I sometimes get away with it on shorter lengths that need less equalization.
  
  I moved the Orbi next to the modem and connected them with the cat5e (not cat6) cable that came in the modem box. The multi-gig light on the modem indicates that it established a 1 Gbps connection with the Orbi (it did that inconsistently through the old wiring). That improved my download speed 10x over the C7100V, to 947 Mbps! This is in spite of the fact that the connection from the Orbi to the computer running the speed test is still the same old behind the walls cat5 cable. But if I update the router to a series 8 with a 2.5Gbps WAN connection maybe I'd be able to deliver that same rate over more than one LAN channel in parallel. That's something for another day.
  
  Moving the Orbi next to the modem didn't do anything for the upload speed, but I wasn't expecting that it would. This is more than good enough for now.