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CM3000 painfully slow speeds via Comcast
Hello folks - anyone else using a CM3000 and experiencing painfully slow speeds? I've ran through the typical troubleshooting (reboot, factory reset), confirmed the Modem is all green for Up/downst...
Wanted to follow up on this -
I stopped by xfinity store and picked up an XB8 from them.
Plugged it in at home & within minutes I'm seeing the advertised speeds... pretty much nail in the coffin - it's the Modem that's the problem.
Going the RMA route to return it.
Truly appreciate the ideas & support of all you fine folks.
Cheers
Attaching the logs w/my CM3000 MAC redacted.
Seeing some criticals there. A T3 entry and those time entries need to be resolved by the ISP.
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.
I'd ask for a -3 or -6Db attenuator to help bring down the power some.
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.
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/