Has anyone faced a similar issue with netgear router C7000 NAS and know how to fix it? The internet keeps dropping randomly for 5 minutes and then comes back up. I restarted, restored to factory settings, but nothing helped. I even posted to the netgear community but no help there so thought of posting here. Following are the event logs. Time Priority Description 2023-4-24, 00:38:27 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-24, 00:38:27 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-23, 22:39:51 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-23, 22:39:50 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-23, 20:37:49 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-23, 20:37:48 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.1;CM-VER=3.0; 2023-4-23, 18:59:07 Notice (6) Honoring MDD; IP provisioning mode = IPv6 2023-4-23, 18:58:58 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.0;CM-VER=3.0; 2023-4-23, 18:58:49 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:5f:86:93:a1:cd;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:04:01 Notice (6) Honoring MDD; IP provisioning mode = IPv6 1970-1-1, 00:03:48 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:03:46 Critical (3) No UCDs Received - Timeout;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:03:36 Warning (5) Lost MDD Timeout;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:03:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:03:17 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:03:16 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:45 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:44 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:44 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:42 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:41 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:10 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:02:09 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:59 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:59 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:21 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:09 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:08 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:01:00 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:59 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:42 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:41 Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:41 Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:06:10:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; #internet #netgear
Have you updated your firmware? Try not enabling too many features related to packet filtering. What other features do you have enabled?
Nope, the firmware version is V1.01.34
Check if an update is available. What filtering features have you enabled?
Ask chatgpt
Do yourself a favor and ditch that asap. "NETGEAR - Nighthawk AC1900 DOCSIS 3.0 Cable Modem + WiFi Router" is a shit device and I struggled with this for 1 year. Go and buy this "Arris SURFboard G34 Desktop DOCSIS 3.1 Cable Modem & Wi-Fi Router" in Walmart or Amzn.
Its not a nighthawk, its C7000-100NAS
Same device pal - https://www.netgear.com/home/wifi/modem-routers/c7000/. Trust me I have invested a lot of time in fixing issues with this shit device and gave up.
Just swap it out with a Cisco ASR ๐. But jokes aside, looks like hardware related failures. Iโd think the device would have some form of manufacturers warranty given itโs not a Cisco device
Issue is caused by over heating.
Any resolutions ?
Cool it with a fan. Problem will be gone