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Forum Discussion
Intermittent connectivity interruptions for both wired and wifi
Cox Cable blames the modem and says firmware is from Netgear. Netgear says Cox may need to push firmware and that it is always pushed by the provider. Netgear refuses to help more without a subscripti...
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router
Remove any MAC Addresses before posting.
Thanks for the help in advance. Sorry for the delay. I've been too busy lately to work on this. Below are the requested pastes. I replaced the valid looking MAC addresses with XXX, while I left a few that show as zeros. Looking forward to reading your responses.
| Frequency start Value | |
| This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. | |
|
Startup Procedure
| Procedure | Status | Comment |
| Acquire Downstream Channel | 951000000 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 | 29 | 951000000 Hz | -3.1 dBmV | 38.8 dB | 0 | 0 |
| 2 | Locked | QAM256 | 1 | 783000000 Hz | -2.7 dBmV | 40.2 dB | 0 | 0 |
| 3 | Locked | QAM256 | 2 | 789000000 Hz | -2.8 dBmV | 40.1 dB | 0 | 0 |
| 4 | Locked | QAM256 | 3 | 795000000 Hz | -2.8 dBmV | 40.1 dB | 0 | 0 |
| 5 | Locked | QAM256 | 4 | 801000000 Hz | -2.7 dBmV | 40.2 dB | 0 | 0 |
| 6 | Locked | QAM256 | 5 | 807000000 Hz | -2.8 dBmV | 40.1 dB | 0 | 0 |
| 7 | Locked | QAM256 | 6 | 813000000 Hz | -3 dBmV | 40 dB | 0 | 0 |
| 8 | Locked | QAM256 | 7 | 819000000 Hz | -3 dBmV | 40 dB | 0 | 0 |
| 9 | Locked | QAM256 | 8 | 825000000 Hz | -2.8 dBmV | 40 dB | 0 | 0 |
| 10 | Locked | QAM256 | 33 | 357000000 Hz | -2.5 dBmV | 40.2 dB | 0 | 0 |
| 11 | Locked | QAM256 | 34 | 363000000 Hz | -2.8 dBmV | 40.1 dB | 0 | 0 |
| 12 | Locked | QAM256 | 35 | 369000000 Hz | -3.2 dBmV | 40 dB | 0 | 0 |
| 13 | Locked | QAM256 | 36 | 375000000 Hz | -3.5 dBmV | 39.9 dB | 0 | 0 |
| 14 | Locked | QAM256 | 37 | 381000000 Hz | -3.7 dBmV | 39.8 dB | 0 | 0 |
| 15 | Locked | QAM256 | 38 | 387000000 Hz | -4 dBmV | 39.7 dB | 0 | 0 |
| 16 | Locked | QAM256 | 39 | 393000000 Hz | -4.2 dBmV | 39.7 dB | 0 | 0 |
| 17 | Locked | QAM256 | 40 | 399000000 Hz | -3.1 dBmV | 40.4 dB | 0 | 0 |
| 18 | Locked | QAM256 | 41 | 405000000 Hz | -2.6 dBmV | 40.8 dB | 0 | 0 |
| 19 | Locked | QAM256 | 42 | 411000000 Hz | -2.4 dBmV | 41.2 dB | 0 | 0 |
| 20 | Locked | QAM256 | 43 | 417000000 Hz | -2.6 dBmV | 40.8 dB | 0 | 0 |
| 21 | Locked | QAM256 | 44 | 423000000 Hz | -2.7 dBmV | 40.8 dB | 0 | 0 |
| 22 | Locked | QAM256 | 46 | 435000000 Hz | -2.7 dBmV | 40.9 dB | 0 | 0 |
| 23 | Locked | QAM256 | 47 | 441000000 Hz | -2.6 dBmV | 41.2 dB | 0 | 0 |
| 24 | Locked | QAM256 | 48 | 447000000 Hz | -2.3 dBmV | 41.3 dB | 0 | 0 |
Upstream Bonded Channels
| Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power |
| 1 | Locked | ATDMA | 3 | 5120 Ksym/sec | 30300000 Hz | 46.9 dBmV |
| 2 | Locked | ATDMA | 1 | 5120 Ksym/sec | 17400000 Hz | 46.9 dBmV |
| 3 | Locked | ATDMA | 2 | 5120 Ksym/sec | 23900000 Hz | 47 dBmV |
| 4 | Locked | ATDMA | 4 | 5120 Ksym/sec | 36700000 Hz | 46.9 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:Fri May 26 21:40:20 2023
| Time | Priority | Description |
| 2023-5-26, 21:02:12 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:14 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:14 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:16 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:16 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:18 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:18 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:20 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:51 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:52 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XXX;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:56 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:02:58 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:00 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:00 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:01 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:02 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=XXX;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:04 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XXX;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:10 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:19 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:03:24 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:03:25 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:03:40 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 1970-1-1, 00:00:39 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XXX;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:39 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:42 | Notice (6) | WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:N/A) - Reason:INIT |
| 1970-1-1, 00:00:42 | Notice (6) | WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT |
| 1970-1-1, 00:00:42 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:50 | Notice (6) | Honoring MDD; IP provisioning mode = IPv4 |
| 1970-1-1, 00:00:51 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:53 | Warning (5) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 1970-1-1, 00:00:53 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.0;CM-VER=3.0; |
| 2023-5-26, 21:06:57 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:06:57 | Notice (6) | TLV-11 - unrecognized OID;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:07:01 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:07:13 | Warning (5) | Unicast DSID PSN startup error |
| 2023-5-26, 21:07:13 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:07:45 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:07:45 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
| 2023-5-26, 21:19:11 | Warning (5) | Unicast DSID PSN startup error |
| 2023-5-26, 21:19:12 | Critical (3) | UCD invalid or channel unusable;CM-MAC=XXX;CMTS-MAC=XXX;CM-QOS=1.1;CM-VER=3.0; |
Been out of town a while but posted the logs last night. The model is c7000,and only docsys 3.0, so not sure if that is the problem.
Power levels are with in specs:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
Though you have Criticals and Warnings in the event logs. Any criticals, errors or warnings seen in the event log needs to be reviewed by the ISP and resolved. This indicates a ISP signal issue on the line up to the modem. https://highspeed.tips/docsis-events/
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html