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CM1100 (Xfinity) downstream light flashing yet connected?
I recently moved back into my home office for work and have noticed something odd that I'd seen months back but never paid attention to. I now suspect that it's been going on for several months now r...
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Power is too high:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
I'd get a -6dbm cable coax line attenuator in behind the modem.
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.
Start with removing any amplifiers, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
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://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/
Heh, I was wondering about power, as some values I'd seen in others' posts weren't nearly that high. I'll give this a try first before I call them.
Why NG has specs on power levels.
Let us know how it goes.
Quick update while I wait for a -6dbm attenuator.....
I happened to find a -3.5dbm attenuated splitter lying around and plugged it in. My averages have dropped to just over 7 now, and I think the errors may be starting to be less frequent. There have still been a few today but not as many.
I'll post an update once the full one arrives tomorrow.