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Frequent Internet Drops
I've had my internet drop about 2-3 times a day for the past month and a half now. It's dropped with different routers and modems, with wired and wifi connections, and with only 1 device compared to several connected. My downstream/upstream channels seam to be in an acceptable range as well. I have a feeling that my issue might be similar to these users, but I'm not sure: https://forums.xfinity.com/t5/Your-Home-Network/Connection-drops-multiple-times-a-day-T3-T4-time-out-in/td-p/3375262
Here is the log:
| Time | Priority | Description |
| 1970-1-1, 00:00:33 | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| 1970-1-1, 00:00:22 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:27 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:21 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:16:18 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.1;CM-VER=3.0; |
| 2020-10-20, 03:14:39 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:31 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:31 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:28 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:28 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:25 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:14:24 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:13:59 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:13:58 | Critical (3) | DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:12:51 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:11:48 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:56 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:51 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:50 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:33 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:32 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:12 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:10:11 | Critical (3) | DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:42 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:37 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:36 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:19 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:18 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:01 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:08:00 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:07:43 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:07:42 | Critical (3) | No UCDs Received - Timeout;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:07:20 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:06:46 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:05:53 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:04:50 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:03:46 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:02:47 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:02:35 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2020-10-20, 03:02:34 | Critical (3) | DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=44:a5:6e:ce:fa:f8;CMTS-MAC=28:52:61:fa:1a:b3;CM-QOS=1.0;CM-VER=3.0; |
| Startup Procedure | ||
| Procedure | Status | Comment |
| Acquire Downstream Channel | 621000000 Hz | Locked |
| Connectivity State | OK | Operational |
| Boot State | OK | Operational |
| Security | Enabled | BPI+ |
| IP Provisioning Mode | Honor MDD | honorMdd(4) |
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Correctables | Uncorrectables |
| 1 | Locked | QAM256 | 37 | 621000000 Hz | 4.8 dBmV | 39 dB | 0 | 0 |
| 2 | Locked | QAM256 | 29 | 573000000 Hz | 6.4 dBmV | 39.7 dB | 0 | 0 |
| 3 | Locked | QAM256 | 30 | 579000000 Hz | 5.6 dBmV | 39.5 dB | 0 | 0 |
| 4 | Locked | QAM256 | 31 | 585000000 Hz | 5.5 dBmV | 39.5 dB | 0 | 0 |
| 5 | Locked | QAM256 | 32 | 591000000 Hz | 5.9 dBmV | 39.6 dB | 0 | 0 |
| 6 | Locked | QAM256 | 33 | 597000000 Hz | 6.4 dBmV | 39.6 dB | 0 | 0 |
| 7 | Locked | QAM256 | 34 | 603000000 Hz | 6.6 dBmV | 39.6 dB | 0 | 0 |
| 8 | Locked | QAM256 | 35 | 609000000 Hz | 5.8 dBmV | 39.3 dB | 0 | 0 |
| 9 | Locked | QAM256 | 36 | 615000000 Hz | 5.2 dBmV | 39.1 dB | 0 | 0 |
| 10 | Locked | QAM256 | 38 | 627000000 Hz | 5.1 dBmV | 39.1 dB | 0 | 0 |
| 11 | Locked | QAM256 | 39 | 633000000 Hz | 6 dBmV | 39.3 dB | 0 | 0 |
| 12 | Locked | QAM256 | 40 | 639000000 Hz | 6.9 dBmV | 39.4 dB | 0 | 0 |
| 13 | Locked | QAM256 | 41 | 645000000 Hz | 6.7 dBmV | 39.4 dB | 0 | 0 |
| 14 | Locked | QAM256 | 42 | 651000000 Hz | 5.8 dBmV | 39.2 dB | 0 | 0 |
| 15 | Locked | QAM256 | 43 | 657000000 Hz | 5.8 dBmV | 39.3 dB | 0 | 0 |
| 16 | Locked | QAM256 | 44 | 663000000 Hz | 6.5 dBmV | 39.4 dB | 0 | 0 |
| Upstream Bonded Channels | ||||||
| Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power |
| 1 | Locked | ATDMA | 4 | 5120 Ksym/sec | 18600000 Hz | 39.3 dBmV |
| 2 | Locked | ATDMA | 1 | 5120 Ksym/sec | 37800000 Hz | 40.8 dBmV |
| 3 | Locked | ATDMA | 2 | 5120 Ksym/sec | 31400000 Hz | 39.3 dBmV |
| 4 | Locked | ATDMA | 3 | 5120 Ksym/sec | 25000000 Hz | 39.3 dBmV |
Responses
No Responses!