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user_71gucl
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Thursday, November 30th, 2023 4:57 PM

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frequent t3 errors (disconnects, drops, errors, etc)

About a month ago I report a similar issue here; thanks to forum user EG I found what I thought was the work-around (attenuator for downstream power), but in the last couple of days the problems have returned and are at least as bad (if not worse) than previously.





Original forum post for reference: https://forums.xfinity.com/conversations/your-home-network/intermittent-desyncs-and-disconnects-getting-worse/6530a1f0e05b5f65da02f615




Here are event logs (Motorola MB8600) from the last 24hrs, excluding "Notice" log level events:





 
  
  
  
 
 
  

   Time
   Priority
   Description
  

  

   18:56:34
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   18:56:35
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:20
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:20
Wed Nov 29 2023		
   Critical (3)
   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:20
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:24
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   19:18:25
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:12:52
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:33
Wed Nov 29 2023		
   Critical (3)
   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:34
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:35
Wed Nov 29 2023		
   Critical (3)
   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:44
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:48
Wed Nov 29 2023		
   Critical (3)
   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:51
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:52
Wed Nov 29 2023		
   Critical (3)
   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:16:57
Wed Nov 29 2023		
   Critical (3)
   CMSTATUS:US_Diplexer_Mode_Change:Fixed Initial, 5-42MHz.
  

  

   20:16:59
Wed Nov 29 2023		
   Critical (3)
   CMSTATUS:US_Diplexer_Mode_Change:TLV-9, 5-42MHz.
  

  

   20:17:07
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:17:20
Wed Nov 29 2023		
   Critical (3)
   CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.
  

  

   20:17:20
Wed Nov 29 2023		
   Critical (3)
   CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.
  

  

   20:17:20
Wed Nov 29 2023		
   Critical (3)
   CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.
  

  

   20:47:48
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:47:48
Wed Nov 29 2023		
   Critical (3)
   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:47:48
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:47:51
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:47:52
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:47:57
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:07
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:16
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:16
Wed Nov 29 2023		
   Critical (3)
   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:16
Wed Nov 29 2023		
   Critical (3)
   16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:17
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:18
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:20
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:20
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:24
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:24
Wed Nov 29 2023		
   Critical (3)
   No Ranging Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   20:48:25
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   21:47:14
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:10:30
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:10:30
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:44
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:44
Wed Nov 29 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=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:44
Wed Nov 29 2023		
   Warning (5)
   Dynamic Range Window violation
  

  

   22:36:44
Wed Nov 29 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=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:44
Wed Nov 29 2023		
   Warning (5)
   Dynamic Range Window violation
  

  

   22:36:45
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:45
Wed Nov 29 2023		
   Warning (5)
   RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   22:36:45
Wed Nov 29 2023		
   Warning (5)
   Dynamic Range Window violation
  

  

   22:36:46
Wed Nov 29 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   00:44:25
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   02:37:37
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   04:51:09
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   04:54:06
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   10:10:44
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

  

   11:37:49
Thu Nov 30 2023		
   Critical (3)
   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[removed];CMTS-MAC=[removed];CM-QOS=1.1;CM-VER=3.1;
  

 









Downstream channel status:





 
  
  
  
  
  
  
  
  
  
 
 
  

   Channel
   Lock Status
   Modulation
   Channel ID
   Freq. (MHz)
   Pwr (dBmV)
   SNR (dB)
   Corrected
   Uncorrected
  

  

   1
   Locked
   QAM256
   9
   507
   0.3
   42.9
   22031
   23776
  

  

   2
   Locked
   QAM256
   1
   453
   0.4
   43.1
   27228
   28169
  

  

   3
   Locked
   QAM256
   2
   459
   0.5
   42.7
   27011
   31975
  

  

   4
   Locked
   QAM256
   3
   465
   0.4
   43
   24895
   28490
  

  

   5
   Locked
   QAM256
   4
   471
   0
   42.9
   26124
   28928
  

  

   6
   Locked
   QAM256
   5
   477
   -0.1
   42.8
   26575
   31089
  

  

   7
   Locked
   QAM256
   6
   483
   0.1
   42.9
   22073
   23633
  

  

   8
   Locked
   QAM256
   7
   489
   0.1
   42.7
   23592
   25699
  

  

   9
   Locked
   QAM256
   8
   495
   0
   42.7
   25480
   30620
  

  

   10
   Locked
   QAM256
   10
   513
   0.4
   42.9
   21415
   24731
  

  

   11
   Locked
   QAM256
   11
   519
   0.2
   42.9
   20974
   21883
  

  

   12
   Locked
   QAM256
   12
   525
   0.1
   42.7
   21919
   25608
  

  

   13
   Locked
   QAM256
   13
   531
   0.4
   42.7
   20610
   24601
  

  

   14
   Locked
   QAM256
   14
   537
   0
   42.4
   18717
   19045
  

  

   15
   Locked
   QAM256
   15
   543
   -0.3
   42.6
   20059
   22509
  

  

   16
   Locked
   QAM256
   16
   549
   -0.5
   42.5
   19177
   24034
  

  

   17
   Locked
   QAM256
   17
   555
   -0.8
   42.3
   18598
   19561
  

  

   18
   Locked
   QAM256
   18
   561
   -1.2
   42
   19718
   21853
  

  

   19
   Locked
   QAM256
   19
   567
   -1.3
   41.9
   17683
   19612
  

  

   20
   Locked
   QAM256
   20
   573
   -1.6
   41.5
   17627
   18291
  

  

   21
   Locked
   QAM256
   21
   579
   -1.9
   41.3
   19027
   22764
  

  

   22
   Locked
   QAM256
   22
   585
   -2.1
   41.1
   17494
   19873
  

  

   23
   Locked
   QAM256
   23
   591
   -2.3
   40.9
   17327
   17477
  

  

   24
   Locked
   OFDM PLC
   37
   690
   -2.2
   39
   1244069560
   101671
  

  

   25
   Locked
   QAM256
   38
   429
   1.4
   43.6
   28448
   30923
  

  

   26
   Locked
   QAM256
   39
   435
   1.1
   43.6
   28349
   30933
  

  

   27
   Locked
   QAM256
   40
   441
   0.8
   43.3
   30601
   35316
  

  

   28
   Locked
   QAM256
   41
   447
   0.5
   43.2
   28028
   30823
  

  

   29
   Locked
   QAM256
   42
   405
   2.2
   44
   33452
   36276
  

  

   30
   Locked
   QAM256
   43
   411
   2
   43.9
   32938
   39226
  

  

   31
   Locked
   QAM256
   44
   417
   1.8
   43.9
   31304
   32734
  

  

   32
   Locked
   QAM256
   45
   423
   1.5
   43.5
   32043
   34001
  

 













Upstream channel status:





 
  
  
  
  
  
  
  
 
 
  

   Channel
   Lock Status
   Channel Type
   Channel ID
   Symb. Rate (Ksym/sec)
   Freq. (MHz)
   Pwr (dBmV)
  

  

   1
   Locked
   SC-QAM
   1
   2560
   10.4
   47.8
  

  

   2
   Locked
   SC-QAM
   2
   5120
   16.4
   47.3
  

  

   3
   Locked
   SC-QAM
   3
   5120
   22.8
   47
  

  

   4
   Locked
   SC-QAM
   4
   5120
   29.2
   47.5
  

  

   5
   Locked
   SC-QAM
   5
   5120
   35.6
   47.5
  

  

   6
   Locked
   SC-QAM
   11
   1280
   39.6
   48.3
  

 











Fingers crossed one of you wizards has another miracle in store...


Question
 • 
Updated 
1 year ago
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This conversation has been merged. Please refer the main conversation: 
intermittent desyncs and disconnects getting worse
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