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No Ranging Response received - T3 time-out; SURFboard SB6141

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No Ranging Response received - T3 time-out; SURFboard SB6141

My modem is constantly giving me the "No Ranging Response received - T3 time-out" error. I am using a SURFboard SB6141 modem. Here are the entries in my error log.

 

Time Priority Code Message
Mar 23 2020 06:36:46 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 11:03:26 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:31 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:49:23 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:42:55 3-Critical R04.0 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:41:21 5-Warning T202.0 Lost MDD Timeout;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:40:57 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:15:46 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:04:24 3-Critical R04.0 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:02:59 5-Warning T202.0 Lost MDD Timeout;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 10:02:36 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 08:55:39 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 08:11:05 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 06:45:14 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
Mar 22 2020 04:18:25 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b8:16:19:f9:ee:a8;CMTS-MAC=18:8b:9d:4a:28:e9;CM-QOS=1.1;CM-VER=3.0;
New Poster

Re: No Ranging Response received - T3 time-out; SURFboard SB6141

Here are my signal readings.

 

Downstream Bonding Channel Value
Channel ID 17  18  19  20  21  22  23  24 
Frequency 525000000 Hz  531000000 Hz  537000000 Hz  543000000 Hz  555000000 Hz  561000000 Hz  567000000 Hz  573000000 Hz 
Signal to Noise Ratio 37 dB  38 dB  37 dB  37 dB  38 dB  37 dB  37 dB  37 dB 
Downstream Modulation QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
2 dBmV   2 dBmV   2 dBmV   2 dBmV   2 dBmV   2 dBmV   2 dBmV   2 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency 23000000 Hz  16600000 Hz  29400000 Hz  35800000 Hz 
Ranging Service ID 1470  1470  1470  1470 
Symbol Rate 5.120 Msym/sec  5.120 Msym/sec  5.120 Msym/sec  5.120 Msym/sec 
Power Level 49 dBmV  49 dBmV  49 dBmV  49 dBmV 
Upstream Modulation [2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
Ranging Status Success  Success  Success  Success 

 

Signal Status (Codewords) Bonding Channel Value
Channel ID 17  18  19  20  21  22  23  24 
Total Unerrored Codewords 3274959752  3273575197  3273567103  3273586996  3273563324  3273560884  3273565473  3273564967 
Total Correctable Codewords 35  26  26  28  42  37  44  46 
Total Uncorrectable Codewords 802  618  535  634  770  675  681  714 
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Expert

Re: No Ranging Response received - T3 time-out; SURFboard SB6141

The upstream power is too high, and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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Re: No Ranging Response received - T3 time-out; SURFboard SB6141

How does this look

Downstream Bonding Channel Value
Channel ID 29  25  26  27  28  30  31  32 
Frequency 603000000 Hz  579000000 Hz  585000000 Hz  591000000 Hz  597000000 Hz  609000000 Hz  615000000 Hz  621000000 Hz 
Signal to Noise Ratio 37 dB  37 dB  37 dB  37 dB  38 dB  38 dB  38 dB  38 dB 
Downstream Modulation QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
9 dBmV   9 dBmV   8 dBmV   8 dBmV   9 dBmV   9 dBmV   8 dBmV   8 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency 23000000 Hz  16600000 Hz  29400000 Hz  35800000 Hz 
Ranging Service ID 1470  1470  1470  1470 
Symbol Rate 5.120 Msym/sec  5.120 Msym/sec  5.120 Msym/sec  5.120 Msym/sec 
Power Level 44 dBmV  44 dBmV  44 dBmV  44 dBmV 
Upstream Modulation [2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
[2] QPSK
[1] 16QAM
[3] 64QAM
 
Ranging Status Success  Success  Success  Success 

 

Signal Status (Codewords) Bonding Channel Value
Channel ID 29  25  26  27  28  30  31  32 
Total Unerrored Codewords 546624925  545658455  545668539  545677126  545626341  545621779  545615456  545615046 
Total Correctable Codewords 24  14  14  15  93  26  44  63 
Total Uncorrectable Codewords 1230  1246  2038  1126  1226  1213  1237  1204