My NETGEAR C7000v2 modem is randomly restarting throughout the day after 17 months with no issues and I think I've gone through all the troubleshooting I could do by myself. I called support and they said it was the router, but the router support says it's the line.
I've swapped in a new cable from the wall to the modem and have a fan running next to it incase of overheating. I have no splitters inside my apartment. Since the error still occurs I have to believe it is the line, but it seems impossible to get a technician out by talking to their call center support. How can I actually get a technician out here to investigate this?
|2020-7-27, 01:59:58||Notice (6)||Honoring MDD; IP provisioning mode = IPv6|
|2020-7-27, 01:59:43||Warning (5)||Dynamic Range Window violation|
|1970-1-1, 00:01:03||Notice (6)||Honoring MDD; IP provisioning mode = IPv6|
|1970-1-1, 00:00:43||Critical (3)||No Ranging Response received - T3 time-out;|
|1970-1-1, 00:00:40||Notice (6)||WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT|
|1970-1-1, 00:00:40||Notice (6)||WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT|
|1970-1-1, 00:00:37||Critical (3)||SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;|
|2020-7-26, 19:53:57||Critical (3)||Started Unicast Maintenance Ranging - No Response received - T3 time-out;|
|1970-1-1, 00:00:46||Critical (3)||No Ranging Response received - T3 time-out;|
|1970-1-1, 00:00:39||Critical (3)||SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;|
|Downstream Bonded Channels|
|Upstream Bonded Channels|
|Extended Upstream Transmit Power|
|Enable Extended Upstream Transmit Power|
|Current System Time:Mon Jul 27 02:10:34 2020|
System Up Time:00:12:10
The upstream power is too 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.