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Hotrod_TX
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Tuesday, May 19th, 2020

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"SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84

Good evening - looking for help with the above error I am seeing in my Arris SB8200 log.

 

The modem is 2 months old and works great, though we have intermittent losses of connectivity.  We pay for a 300MB plan and see those speeds.

 

My network consists of the above modem, along with an Apple WiFi router.

 

Here is the status page:

 

Procedure Status Comment
Acquire Downstream Channel 573000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
21 Locked QAM256 573000000 Hz 10.8 dBmV 40.3 dB 2 0
9 Locked QAM256 501000000 Hz 11.4 dBmV 41.4 dB 0 0
10 Locked QAM256 507000000 Hz 11.4 dBmV 41.0 dB 0 0
11 Locked QAM256 513000000 Hz 11.2 dBmV 41.0 dB 2 0
12 Locked QAM256 519000000 Hz 11.2 dBmV 40.9 dB 0 0
13 Locked QAM256 525000000 Hz 11.2 dBmV 40.7 dB 0 0
14 Locked QAM256 531000000 Hz 11.2 dBmV 40.4 dB 1 0
15 Locked QAM256 537000000 Hz 11.1 dBmV 40.3 dB 1 0
16 Locked QAM256 543000000 Hz 11.1 dBmV 40.5 dB 2 0
17 Locked QAM256 549000000 Hz 11.0 dBmV 40.5 dB 1 0
18 Locked QAM256 555000000 Hz 11.0 dBmV 40.8 dB 2 0
19 Locked QAM256 561000000 Hz 11.1 dBmV 40.5 dB 2 0
20 Locked QAM256 567000000 Hz 10.9 dBmV 40.7 dB 2 0
22 Locked QAM256 579000000 Hz 10.7 dBmV 40.5 dB 0 0
23 Locked QAM256 585000000 Hz 11.0 dBmV 40.2 dB 2 0
24 Locked QAM256 591000000 Hz 11.0 dBmV 40.4 dB 1 0
25 Locked QAM256 597000000 Hz 11.1 dBmV 40.3 dB 2 0
26 Locked QAM256 603000000 Hz 11.2 dBmV 40.2 dB 1 0
27 Locked QAM256 609000000 Hz 11.1 dBmV 40.2 dB 5 0
28 Locked QAM256 615000000 Hz 11.3 dBmV 40.0 dB 3 0
29 Locked QAM256 621000000 Hz 11.4 dBmV 40.1 dB 4 0
30 Locked QAM256 627000000 Hz 11.5 dBmV 40.3 dB 2 0
31 Locked QAM256 633000000 Hz 11.5 dBmV 40.1 dB 3 0
32 Locked QAM256 639000000 Hz 11.6 dBmV 40.1 dB 3 0
33 Locked QAM256 645000000 Hz 11.8 dBmV 40.1 dB 8 0
34 Locked QAM256 651000000 Hz 11.9 dBmV 40.0 dB 4 0
35 Locked QAM256 657000000 Hz 12.0 dBmV 39.9 dB 2 0
36 Locked QAM256 663000000 Hz 12.0 dBmV 39.8 dB 2 0
37 Locked QAM256 669000000 Hz 11.9 dBmV 40.0 dB 2 0
38 Locked QAM256 675000000 Hz 11.9 dBmV 39.5 dB 2 0
39 Locked QAM256 681000000 Hz 11.9 dBmV 40.2 dB 6 0
40 Locked QAM256 687000000 Hz 11.8 dBmV 40.1 dB 4 0
159 Locked Other 722000000 Hz 12.8 dBmV 37.8 dB 292849047 0


 

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 3 Locked SC-QAM Upstream 23000000 Hz 6400000 Hz 41.0 dBmV
2 1 Locked SC-QAM Upstream 36100000 Hz 6400000 Hz 41.0 dBmV
3 2 Locked SC-QAM Upstream 29600000 Hz 6400000 Hz 42.0 dBmV
4 4 Locked SC-QAM Upstream 16500000 Hz 6400000 Hz 41.0 dBmV

Current System Time: Tue May 19 17:40:07 2020

 

Here are the logs (I restarted due today to see how logs would be updated):
 
05/19/2020 16:57 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 2436694066 6 "Honoring MDD; IP provisioning mode = IPv6"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/18/2020 20:07 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:38 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:26 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:18 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:16 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:16 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:16 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:16 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:15 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:15 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:15 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:15 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:14 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/16/2020 12:14 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/15/2020 12:06 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/15/2020 11:53 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
05/13/2020 08:52 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:38 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:37 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:37 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:37 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:37 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:35 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:32 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:31 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:31 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:30 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:29 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:29 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/13/2020 08:29 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/12/2020 12:43 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
05/12/2020 12:43 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/07/2020 09:49 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
04/29/2020 10:33 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
04/29/2020 10:20 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
04/29/2020 10:20 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
04/29/2020 10:19 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"
04/29/2020 10:19 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0e:cd:85;CMTS-MAC=00:38:df:08:84:ef;CM-QOS=1.1;CM-VER=3.1;"

 

Here is the product info (there are no updates available):

Standard Specification Compliant Docsis 3.1
Hardware Version 6
Software Version AB01.01.009.32.01_122319_183.0A.NSH
Cable Modem MAC Address 14:C0:3E:0E:CD:85

 

Anyone have any ideas as to what the errors are telling me?

 

Thanks!

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