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Forum Discussion
N450 CG3000Dv2 dropping wired and wireless connection repeatedly
A few days ago I started losing my connection from my N450 CG3000Dv2 modem/router. This occurs on both a hard-wired (gigabit) connection to the router and on other devices connected wirelessly. I c...
Hello Mattst
You could post the logs when it happens you can find them in the settings under Maintenance and then event log. This may tell us what is happening.
DarrenM
Thanks. Here's the log:
Time Priority Description
2017-01-12, 01:33:52.0 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
2017-01-12, 01:33:23.0 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
2017-01-12, 01:30:34.0 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
2017-01-12, 01:25:45.0 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.1;CM-VER=3.0;
2017-01-12, 01:23:42.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.1;CM-VER=3.0;
2017-01-12, 01:21:55.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.1;CM-VER=3.0;
2017-01-12, 01:21:49.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.1;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=my:ff:ff:ff:ff:my;CMTS-MAC=00:01:02:02:03:03;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Notice (6) WiFi Interface [wl0] set to Channel 3 (Side-Band Channel:N/A) - Reason:INITHello Mattst
Those T3 timeouts typically mean its a signal issue on your lines so you might need your ISP tech to come out and check everything out. I linked a article on what the timeouts mean below.
https://volpefirm.com/docsis_timout_descriptions/
DarrenM
Thanks I will see what they say.
Just curious - do you know why all those entries are logged without a timestamp (using "Time Not Established" instead)? I would have thought the router would have its own internal time that could be used in the log.