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internet drops
Hello. I am experiencing frequent internet outages. I have a Netgear Gateway CM500V. Here are my event logs:
Time Priority Description Wed Oct 07 17:59:56 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Wed Oct 07 17:59:43 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.0;CM-VER=3.0; Wed Oct 07 17:59:40 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:59:11 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Wed Oct 07 17:58:55 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:58:46 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:51:03 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Wed Oct 07 17:50:47 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:50:33 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:41:34 2020 Critical (3) REG RSP not received;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:41:20 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Wed Oct 07 17:41:08 2020 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.0;CM-VER=3.0; Wed Oct 07 17:40:55 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:40:43 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:40:35 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:40:22 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:29:27 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Wed Oct 07 17:29:22 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.0;CM-VER=3.0; Wed Oct 07 17:29:17 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.0;CM-VER=3.0; Wed Oct 07 17:29:09 2020 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.0;CM-VER=3.0; Wed Oct 07 17:28:51 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:28:39 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:28:31 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:28:19 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 17:05:34 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:44:59 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:44:50 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:44:15 2020 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:44:14 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:43:43 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0; Wed Oct 07 16:43:14 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:22:25:80;CMTS-MAC=b0:90:7e:0e:99:5b;CM-QOS=1.1;CM-VER=3.0;
Here are my modem stats:
Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 1 405000000 Hz 0 dBmV 40.2 dB 27121 20060 2 Locked QAM256 2 411000000 Hz 0 dBmV 40.1 dB 27403 20136 3 Locked QAM256 3 417000000 Hz 0.1 dBmV 40.1 dB 25950 19089 4 Locked QAM256 4 423000000 Hz 0.3 dBmV 40 dB 25229 19098 5 Locked QAM256 5 429000000 Hz 0.3 dBmV 40 dB 25062 18891 6 Locked QAM256 6 435000000 Hz 0.4 dBmV 40 dB 31918 22142 7 Locked QAM256 7 447000000 Hz 0.5 dBmV 39.9 dB 23230 17629 8 Locked QAM256 8 453000000 Hz 0.6 dBmV 39.9 dB 23265 17644 9 Locked QAM256 9 459000000 Hz 0.4 dBmV 39.8 dB 23289 17432 10 Locked QAM256 10 465000000 Hz 0.3 dBmV 39.7 dB 22352 17549 11 Locked QAM256 11 471000000 Hz 0.2 dBmV 39.7 dB 24206 17740 12 Locked QAM256 12 477000000 Hz 0.1 dBmV 39.7 dB 22632 16772 13 Locked QAM256 13 483000000 Hz 0.2 dBmV 39.7 dB 25923 18409 14 Locked QAM256 14 489000000 Hz 0 dBmV 39.7 dB 22714 16444 15 Locked QAM256 15 495000000 Hz 0.2 dBmV 39.7 dB 23465 16548 16 Locked QAM256 16 501000000 Hz 0.1 dBmV 39.6 dB 22647 17137 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 35600000 Hz 49 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 48 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 49 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 48 dBmV
Does anyone have any suggestions as to how to proceed? I had a technician out this morning and he replaced the line from the pole to the house. I am hoping the above data can give an idea as to what the problem might be...
Thanks,
-Robert
Responses
EG
Expert
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86.5K Messages
7 m ago
The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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