I recently upgraded my internet speed to 1.2Gb and added a self purchased modem Netgear CM2050v. I was able to get speeds in the 950Mbs range which I was happy with given my connection to the modem is currently only 1gb not the 2.5gb. My speeds when connected directly to the modem are now frequently in the 500-600Mbs range and I am wondering if I could get some assistance in looking at the logs. I have done resets/unplugs of the modem and connected directly to It with nothing really changing. I have done speed tests straight to xfinity.speedtest.com as well. Not sure if it maters but the clock seems to be off by 1hr I assume DST.
I do see the following message in the log upon rebooting:
| Mon Aug 02 21:28:17 2021 |
(Warning (5)) |
DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| Mon Aug 02 21:28:15 2021 |
(Critical (3)) |
SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
Cable Connection
| Startup Procedure |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
579000000 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 |
25 |
579000000 Hz |
2.0 dBmV |
39.2 dB |
0 |
0 |
| 2 |
Locked |
QAM256 |
1 |
423000000 Hz |
5.3 dBmV |
40.1 dB |
0 |
0 |
| 3 |
Locked |
QAM256 |
2 |
429000000 Hz |
5.5 dBmV |
40.1 dB |
0 |
0 |
| 4 |
Locked |
QAM256 |
3 |
435000000 Hz |
5.6 dBmV |
40.1 dB |
0 |
0 |
| 5 |
Locked |
QAM256 |
4 |
441000000 Hz |
5.5 dBmV |
40.1 dB |
0 |
0 |
| 6 |
Locked |
QAM256 |
5 |
447000000 Hz |
5.5 dBmV |
40.3 dB |
0 |
0 |
| 7 |
Locked |
QAM256 |
6 |
453000000 Hz |
5.5 dBmV |
40.5 dB |
0 |
0 |
| 8 |
Locked |
QAM256 |
7 |
459000000 Hz |
5.2 dBmV |
40.4 dB |
0 |
0 |
| 9 |
Locked |
QAM256 |
8 |
465000000 Hz |
4.9 dBmV |
40.3 dB |
0 |
0 |
| 10 |
Locked |
QAM256 |
9 |
471000000 Hz |
4.6 dBmV |
40.2 dB |
0 |
0 |
| 11 |
Locked |
QAM256 |
10 |
477000000 Hz |
4.4 dBmV |
40.2 dB |
0 |
0 |
| 12 |
Locked |
QAM256 |
11 |
483000000 Hz |
4.3 dBmV |
40.3 dB |
0 |
0 |
| 13 |
Locked |
QAM256 |
12 |
489000000 Hz |
4.2 dBmV |
40.4 dB |
0 |
0 |
| 14 |
Locked |
QAM256 |
13 |
495000000 Hz |
3.8 dBmV |
40.2 dB |
0 |
0 |
| 15 |
Locked |
QAM256 |
14 |
507000000 Hz |
3.6 dBmV |
40.2 dB |
0 |
0 |
| 16 |
Locked |
QAM256 |
15 |
513000000 Hz |
3.3 dBmV |
40.0 dB |
0 |
0 |
| 17 |
Locked |
QAM256 |
16 |
519000000 Hz |
3.2 dBmV |
39.9 dB |
0 |
0 |
| 18 |
Locked |
QAM256 |
17 |
525000000 Hz |
3.0 dBmV |
39.9 dB |
0 |
0 |
| 19 |
Locked |
QAM256 |
18 |
531000000 Hz |
2.6 dBmV |
39.7 dB |
0 |
0 |
| 20 |
Locked |
QAM256 |
19 |
543000000 Hz |
2.1 dBmV |
39.6 dB |
0 |
0 |
| 21 |
Locked |
QAM256 |
20 |
549000000 Hz |
1.9 dBmV |
39.5 dB |
0 |
0 |
| 22 |
Locked |
QAM256 |
21 |
555000000 Hz |
1.8 dBmV |
39.2 dB |
0 |
0 |
| 23 |
Locked |
QAM256 |
22 |
561000000 Hz |
1.8 dBmV |
39.2 dB |
0 |
0 |
| 24 |
Locked |
QAM256 |
23 |
567000000 Hz |
1.8 dBmV |
39.1 dB |
0 |
0 |
| 25 |
Locked |
QAM256 |
24 |
573000000 Hz |
2.0 dBmV |
39.2 dB |
0 |
0 |
| 26 |
Locked |
QAM256 |
26 |
585000000 Hz |
2.3 dBmV |
39.3 dB |
0 |
0 |
| 27 |
Locked |
QAM256 |
27 |
591000000 Hz |
2.4 dBmV |
39.2 dB |
0 |
0 |
| 28 |
Locked |
QAM256 |
28 |
597000000 Hz |
2.5 dBmV |
39.2 dB |
0 |
0 |
| 29 |
Locked |
QAM256 |
29 |
603000000 Hz |
2.7 dBmV |
39.1 dB |
1 |
0 |
| 30 |
Locked |
QAM256 |
30 |
609000000 Hz |
2.7 dBmV |
39.0 dB |
1 |
0 |
| 31 |
Locked |
QAM256 |
31 |
615000000 Hz |
2.6 dBmV |
39.0 dB |
193 |
0 |
| 32 |
Locked |
QAM256 |
32 |
621000000 Hz |
2.7 dBmV |
39.0 dB |
1105097 |
32161 |
|
|
|
| Upstream Bonded Channels |
| Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
1 |
5120 |
16400000 Hz |
37.3 dBmV |
| 2 |
Locked |
ATDMA |
2 |
5120 |
22800000 Hz |
37.8 dBmV |
| 3 |
Locked |
ATDMA |
3 |
5120 |
29200000 Hz |
38.8 dBmV |
| 4 |
Locked |
ATDMA |
4 |
5120 |
35600000 Hz |
39.3 dBmV |
| 5 |
Locked |
ATDMA |
5 |
2560 |
40400000 Hz |
39.8 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 |
Profile ID |
Channel ID |
Frequency |
Power |
SNR / MER |
Active Subcarrier
Number Range |
Unerrored
Codewords |
Correctable
Codewords |
Uncorrectable
Codewords |
| 1 |
Locked |
0 ,1 |
159 |
722000000 Hz |
-0.1 dBmV |
37.6 dB |
1246 ~ 2849 |
3145641141 |
518182283 |
2590 |
| 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:Tue Aug 03 20:34:17 2021 |
| System Up Time:23:19:07 |
user_3472c1
Visitor
•
5 Messages
4 years ago
Is there something more I need to include to get help with this? I have a new splitter coming for the outside of the house to replace a much older 3:1 that is currently used.
J.
0
0
EG
Expert
•
111.6K Messages
4 years ago
The signal status figures are o/k. Please post the error log entries in their entirety but redact the CM and the CMTS MAC addresses for your privacy.
0
user_3472c1
Visitor
•
5 Messages
4 years ago
Thank you, I have been resetting/rebooting a lot but here is my log currently.
Time
Priority
Description
Thu Aug 05 06:44:33 2021
(Notice (6))
CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 05 06:44:05 2021
(Notice (6))
CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:31:16 2021
(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=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:31:10 2021
(Warning (5))
DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:31:10 2021
(Critical (3))
SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:19:12 2021
(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=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:19:05 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 21:19:05 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:19:04 2021
(Warning (5))
REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:18:58 2021
(Notice (6))
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:18:53 2021
(Notice (6))
TLV-11 - unrecognized OID;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;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=Redacted-CM-MAC;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:09:04 2021
(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=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:08:54 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 21:08:54 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:08:53 2021
(Warning (5))
REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:08:48 2021
(Notice (6))
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:08:43 2021
(Notice (6))
TLV-11 - unrecognized OID;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;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=Redacted-CM-MAC;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:03:34 2021
(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=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:03:23 2021
(Warning (5))
REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:03:17 2021
(Notice (6))
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 21:03:12 2021
(Notice (6))
TLV-11 - unrecognized OID;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;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=Redacted-CM-MAC;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:41 2021
(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=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:34 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 20:56:34 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:34 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 20:56:34 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:34 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 20:56:34 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:34 2021
(Warning (5))
Dynamic Range Window violation
Wed Aug 04 20:56:34 2021
(Warning (5))
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:33 2021
(Warning (5))
REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:28 2021
(Notice (6))
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 04 20:56:23 2021
(Notice (6))
TLV-11 - unrecognized OID;CM-MAC=Redacted-CM-MAC;CMTS-MAC=Redacted-CMTS-MAC;CM-QOS=1.1;CM-VER=3.1;
Time Not Established
(Notice (6))
Honoring MDD; IP provisioning mode = IPv6
0
0
user_3472c1
Visitor
•
5 Messages
4 years ago
My connection was rebooted 12 hours ago but I have these upstream channels with a few uncorrectable errors:
and What is typical for Downstream OFDM, there always seems to be some uncorrectable codewords but I don't know what "a lot" looks like.
Number Range
Codewords
Codewords
Codewords
1
0
EG
Expert
•
111.6K Messages
4 years ago
The signal stats are o/k but the error log entries indicate that something is going on. Perhaps there is noise ingress into the line(s) / an upstream channel-return path impairment somewhere.
There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They will be able to poll the CMTS to see whether or not everything is in the green zone, see your node / cable plant and modem health, and also see a history plot for the modem. You should get a reply here in your topic. Good luck !
0
user_3472c1
Visitor
•
5 Messages
4 years ago
Thank you I really appreciate it. My new splitter should come tomorrow and I'll install it right away just as a cya but honestly I was pretty consistent 940Mbs there for a week or two and then it dropped to half that suddenly around the same time my area had an outage.
Thanks for looking at this EG.. I'll update this if I hear from them.
1