C7000 random internet disconnection, please help

[polishkaz]

Hello,

I was having some slight issues with intermittent dropouts with an old modem so I purchased a new Netgear ac1900 c7000 modem router combo.  The issues have persisted.  I am hoping someone here who is better at networking troubleshooting can help me out.  Attached below are my logs and additional information.  I have a tech coming out on Tuesday but I would like to know ahead of time if the issue appears to be on my end or cox's end.  Can anyone assist me if I provide logs, event logs and cable connection information?  Thanks!!:

[polishkaz]

My event logs:

Time Priority Description 2016-7-17, 05:40:14 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-17, 17:40:43 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-18, 07:35:58 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-18, 10:47:16 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-18, 23:21:31 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-19, 00:46:31 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-19, 13:48:09 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-21, 18:43:01 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-22, 05:55:02 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-23, 00:54:57 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-23, 17:53:19 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-23, 20:51:37 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-23, 21:19:07 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-24, 14:31:03 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-7-24, 19:01:22 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:40 Notice (6)  WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:40 Notice (6)  WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:47 Notice (6)  Honoring MDD; IP provisioning mode = IPv4 1970-1-1, 00:00:49 Warning (5)  DHCP WARNING - Non-critical field invalid in response ;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.0;CM-VER=3.0; 2016-7-24, 20:06:42 Notice (6)  TLV-11 - unrecognized OID;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0; 2016-7-24, 20:07:25 Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:00:4e:a0;CMTS-MAC=00:25:84:57:19:9d;CM-QOS=1.1;CM-VER=3.0;

 and cable connection settings

Startup Procedure

Procedure Status Comment Acquire Downstream Channel 825000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 99 825000000 Hz 8.3 dBmV 42 dB 0 0 2 Locked QAM256 97 813000000 Hz 8.1 dBmV 42.1 dB 0 0 3 Locked QAM256 98 819000000 Hz 8.3 dBmV 42.1 dB 0 0 4 Locked QAM256 100 831000000 Hz 8.2 dBmV 41.8 dB 0 0 5 Locked QAM256 101 837000000 Hz 8.6 dBmV 40.1 dB 0 0 6 Locked QAM256 102 843000000 Hz 8.6 dBmV 41.5 dB 0 0 7 Locked QAM256 103 849000000 Hz 8.5 dBmV 41.7 dB 0 0 8 Locked QAM256 104 855000000 Hz 8.8 dBmV 41.8 dB 0 0 9 Locked QAM256 105 861000000 Hz 9.1 dBmV 42.1 dB 0 0 10 Locked QAM256 106 867000000 Hz 8.8 dBmV 41.9 dB 0 0 11 Locked QAM256 107 873000000 Hz 9.3 dBmV 42 dB 0 0 12 Locked QAM256 108 879000000 Hz 9.8 dBmV 42.3 dB 0 0 13 Locked QAM256 109 885000000 Hz 9.2 dBmV 42.1 dB 0 0 14 Locked QAM256 110 891000000 Hz 9.7 dBmV 42.3 dB 0 0 15 Locked QAM256 111 897000000 Hz 10.2 dBmV 42.4 dB 0 0 16 Locked QAM256 112 903000000 Hz 9.7 dBmV 42.2 dB 0 0 17 Locked QAM256 113 909000000 Hz 9.6 dBmV 43.2 dB 0 0 18 Locked QAM256 114 915000000 Hz 10 dBmV 43.2 dB 0 0 19 Locked QAM256 115 921000000 Hz 9.2 dBmV 43.2 dB 0 0 20 Locked QAM256 116 927000000 Hz 9.8 dBmV 43.2 dB 0 0 21 Locked QAM256 117 933000000 Hz 10.7 dBmV 43.3 dB 0 0 22 Locked QAM256 118 939000000 Hz 10.6 dBmV 43.8 dB 0 0 23 Locked QAM256 119 945000000 Hz 10.9 dBmV 43.3 dB 0 0 24 Locked QAM256 120 951000000 Hz 12.1 dBmV 43.9 dB 0 0

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 2560 Ksym/sec 24400000 Hz 41.4 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 40.5 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 35600000 Hz 42 dBmV 4 Locked ATDMA 4 2560 Ksym/sec 40400000 Hz 42 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Current System Time:Sun Jul 24 20:22:20 2016

[DarrenM]

Hello polishkaz

I am seeing quite a lot of T4 timeouts in your logs I would say you should contact your ISP and maybe have them come out and check the cable lines.

DarrenM

[polishkaz]

Been back and forth with Cox, no issue found, multiple times, signals are all clean and within spec.  They are claiming to not see as many T4 timeouts as I am.  I noticed I'm running firmware1.01.18 when the netgear website says I should be running 1.01.15.  What gives, anyway to get the older version to test it out?  Did cox push a firmware thats screwing me?