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C6300 Frequent short internet drops
I have a C6300 modem/router with Xfiinity cable internet. I have used this exact set-up for several years without any issues, but over the last few weeks my internet has been pretty bad. A...
Just wanted to give an update. I switched to a Motorola MB7621 (24x8 DOCSIS 3.0) modem and another router (an old TP Link that I borrowed) without changing/replacing anything in the coax line. That solved the problem immediately. My guess is the old C6300 modem-router hardware was failing.
Please post a copy and paste of the modems connection status page.
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.
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://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
ISP has checked signal up to the modem and verified cable and connection quality. There is no splitter installed. Power off for 1 minute and back on didn't make a difference.
Connection page:
<tabindex=-1>Startup Procedure</tabindex=-1> Procedure Status Comment Acquire Downstream Channel 525000000 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 QAM 256 1 435000000 Hz -1.9 dBmV 40.3 dB 724335 4590707 2 Locked QAM 256 2 441000000 Hz -1.9 dBmV 40.9 dB 0 0 3 Locked QAM 256 3 447000000 Hz -1.7 dBmV 40.3 dB 0 0 4 Locked QAM 256 4 453000000 Hz -1.5 dBmV 40.9 dB 19 0 5 Locked QAM 256 5 459000000 Hz -1.4 dBmV 40.3 dB 304 4471 6 Locked QAM 256 6 465000000 Hz -1.5 dBmV 40.3 dB 92016 1199165 7 Locked QAM 256 7 471000000 Hz -1.5 dBmV 40.3 dB 0 0 8 Locked QAM 256 8 477000000 Hz -1.5 dBmV 40.3 dB 0 0 9 Locked QAM 256 9 483000000 Hz -1.5 dBmV 40.9 dB 0 0 10 Locked QAM 256 10 489000000 Hz -1.5 dBmV 40.9 dB 0 0 11 Locked QAM 256 11 495000000 Hz -1.7 dBmV 40.9 dB 0 0 12 Locked QAM 256 12 501000000 Hz -1.7 dBmV 40.9 dB 0 0 13 Locked QAM 256 13 507000000 Hz -1.9 dBmV 40.9 dB 0 0 14 Locked QAM 256 14 513000000 Hz -2.0 dBmV 40.3 dB 0 0 15 Locked QAM 256 15 519000000 Hz -2.2 dBmV 40.9 dB 0 0 16 Locked QAM 256 16 525000000 Hz -2.2 dBmV 40.3 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 2 5120 Ksym/sec 16400000 Hz 44.3 dBmV 2 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 44.3 dBmV 3 Locked ATDMA 4 5120 Ksym/sec 29200000 Hz 44.3 dBmV 4 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 42.8 dBmV Current System Time: Wed Mar 9 16:46:52 2022 System Up Time: 5 days 06:18:49 A tad bit low on power however with in spec.
Though are you getting some correct and uncorrectables that should be zero on 4, 5 and 6.
Check for loose connections. Make sure all coax jack plugs are screwed in firmly.
Had a factory reset and setup from scratch been performed?
Yes, verified all connections and factory reset has been performed. Using standard settings now, so no setup after factory reset.