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Vaiper13's avatar
Vaiper13
New Contributor
8 months ago

Intermittent Packet loss

Hello, I have been experiencing intermittent packet loss from my 2Gig Cox internet plan over the last two months. So far I have exchanged my router from a pfsense machine to an opnsense machine with completely separate hardware, and also replaced my Motorola MB8611 with a Netgear CM2000. I have eliminated all COAX splitters within my home and now have a direct line from the tap to my modem, verified to be good and working by a Cox technician on a previous visit. Even with these changes, I experience multiple cut-outs per day, lasting several minutes, typically occurring later at night. I have been logging the connection using my Opnsense setup connected directly to the modem, showing significant upload packet loss during these times.

Here is the connection table from my modem and some of the errors occuring. If I can pull a table when the problem occurs, I will update this thread.

Procedure Status Comment
Acquire Downstream Channel 855000000 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 21 855000000 Hz 0.4 dBmV 40.7 dB 20 0
2 Locked QAM256 1 735000000 Hz 2.3 dBmV 41.6 dB 9 28
3 Locked QAM256 2 741000000 Hz 2.4 dBmV 41.6 dB 9 28
4 Locked QAM256 3 747000000 Hz 2.4 dBmV 41.6 dB 7 30
5 Locked QAM256 4 753000000 Hz 2.6 dBmV 41.6 dB 7 29
6 Locked QAM256 5 759000000 Hz 2.5 dBmV 41.6 dB 10 27
7 Locked QAM256 6 765000000 Hz 2.4 dBmV 41.5 dB 15 33
8 Locked QAM256 7 771000000 Hz 2.2 dBmV 41.5 dB 12 28
9 Locked QAM256 8 777000000 Hz 2.0 dBmV 41.4 dB 14 0
10 Locked QAM256 9 783000000 Hz 1.8 dBmV 41.4 dB 13 28
11 Locked QAM256 10 789000000 Hz 1.7 dBmV 41.3 dB 11 0
12 Locked QAM256 11 795000000 Hz 1.6 dBmV 41.2 dB 22 0
13 Locked QAM256 12 801000000 Hz 1.5 dBmV 41.2 dB 14 0
14 Locked QAM256 13 807000000 Hz 1.3 dBmV 41.1 dB 11 0
15 Locked QAM256 14 813000000 Hz 1.2 dBmV 41.0 dB 11 0
16 Locked QAM256 15 819000000 Hz 0.9 dBmV 40.8 dB 16 0
17 Locked QAM256 16 825000000 Hz 0.7 dBmV 40.8 dB 55 3
18 Locked QAM256 17 831000000 Hz 0.6 dBmV 40.7 dB 24 0
19 Locked QAM256 18 837000000 Hz 0.6 dBmV 40.7 dB 24 0
20 Locked QAM256 19 843000000 Hz 0.6 dBmV 40.8 dB 31 0
21 Locked QAM256 20 849000000 Hz 0.4 dBmV 40.7 dB 34 0
22 Locked QAM256 22 861000000 Hz 0.4 dBmV 40.8 dB 26 0
23 Locked QAM256 23 867000000 Hz 0.3 dBmV 40.8 dB 23 0
24 Locked QAM256 24 873000000 Hz 0.3 dBmV 40.6 dB 21 0
25 Locked QAM256 41 213000000 Hz 7.4 dBmV 43.9 dB 156 0
26 Locked QAM256 42 219000000 Hz 7.3 dBmV 43.9 dB 158 0
27 Locked QAM256 43 225000000 Hz 7.1 dBmV 44.0 dB 147 0
28 Locked QAM256 44 231000000 Hz 6.9 dBmV 44.0 dB 167 0
29 Locked QAM256 45 237000000 Hz 6.8 dBmV 43.9 dB 179 0
30 Locked QAM256 46 243000000 Hz 6.6 dBmV 43.9 dB 218 0
31 Locked QAM256 47 249000000 Hz 6.3 dBmV 43.8 dB 188 0
32 Locked QAM256 48 255000000 Hz 6.2 dBmV 43.8 dB 206 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 17600000 Hz 36.5 dBmV
2 Locked ATDMA 2 5120 24000000 Hz 36.8 dBmV
3 Locked ATDMA 3 5120 30400000 Hz 36.3 dBmV
4 Locked ATDMA 4 5120 36800000 Hz 36.8 dBmV
5 Not Locked Unknown 0 0 0 Hz 0.0 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 ,3 159 300000000 Hz 5.0 dBmV 42.7 dB 296 ~ 7895 12490206544 913196583 266
2 Locked 0 ,1 ,2 ,3 160 918000000 Hz 0.4 dBmV 40.3 dB 1108 ~ 2987 3515880772 895809833 0
 
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Locked 3 ,4 ,9 ,10 ,11 ,12 ,13 6 36800000 Hz 31.8 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

Here are some of the errors I have been getting in my modem log with the Mac address removed.

Mon Aug 28 08:58:44 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:47:59 2023

(Notice (6))

US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:47:05 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:43:30 2023

(Notice (6))

US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 11 13.;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:37:08 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:35:17 2023

(Notice (6))

US profile assignment change. US Chan ID: 8; Previous Profile: 9 13; New Profile: 10 13.;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:35:08 2023

(Critical (3))

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:33:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:48 2023

(Critical (3))

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:47 2023

(Warning (5))

Dynamic Range Window violation

Mon Aug 28 08:31:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:47 2023

(Warning (5))

Dynamic Range Window violation

Mon Aug 28 08:31:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:47 2023

(Warning (5))

Dynamic Range Window violation

Mon Aug 28 08:31:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:47 2023

(Warning (5))

Dynamic Range Window violation

Mon Aug 28 08:31:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:31:47 2023

(Warning (5))

Dynamic Range Window violation

Mon Aug 28 08:31:47 2023

(Warning (5))

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 08:16:59 2023

(Notice (6))

US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 9 13.;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Mon Aug 28 07:49:28 2023

(Notice (6))

US profile assignment change. US Chan ID: 8; Previous Profile: 9 13; New Profile: 10 13.;CM-MAC=00:00:00:00:0:00;CMTS-MAC=00:00:00:00:0:00;CM-QOS=1.1;CM-VER=3.1;

Looking for advice, thanks.

1 Reply

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  • WiderMouthOpen's avatar
    WiderMouthOpen
    Esteemed Contributor

    Looks like a problem with the upstream OFDMA channel. Keep scheduling technicians until they send a supervisor. If that fails, file a FCC complaint. T3 errors are one of the hardest problems to troubleshoot. Good luck.