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Forum Discussion
Netgear Night Hawk CM 2000 error codes galore.
Hello,
Equipment
Modem-Netgear Night Hawk CM 2000
Router-Rog Strix GS-AX5400
Firmwares have been verified and drivers double checked.
Long story short: I pay for 1gb speed from Spectrum. Router while wired into modem gets 700-900 on ookla speed tests(router has ookla internal speed check built in). PC with 2.5gb port and Cat8 cable running speed test on ookla via Brave browser resulted 300mbps down at best and never going more than 20 over 300mbps after multiple tests. Cables and ports don't appear to be degraded. Modem keeps pushing error messages and that's my only indicator something is not right. Had a service technician come and check the outside and house coax lines and he reported they are fine and that he is able to receive the correct speed on his device when connected in the house. Attached are the readings from my modems event log and cable connections. I am novice in this field but savvy and quick to learn. Will take any help but if you're willing to tech me a little and help me troubleshoot I would be grateful! If I've missed any other key info don't hesitate to ask.
1 Reply
Some channels are a bit too high:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
MIght install a good quality -6dbm coax line attenuator on the line.
A few channels have some correctables and un-correctables. Should be zeros like the other channels.
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.
Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended.
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, signal attenuators, 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://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/
