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CAX30 drops cable connection 2-3 times a day
Netgear CAX30 Firmware 2.2.2.2
Devices connect through WiFi and wired connections through an unmanaged switch.
The CAX30 was pretty solid up until 2 weeks ago when the Internet connection began dropping 2-3 times per day. Rebooting the router fixed the problem temporarily. The cable company, Optimum, claims that there is nothing wrong with their wires or system. Of course, they run their diagnostic after the system is up and running again so if there's a transient problem, they wouldn't detect it. I've run cable diagnostics before and after rebooting. Those are attached below.
I used to have a DSL connection with the telco and switched because the number of packet errors was overwhelming the modem. I noticed that there seem to be a large number of packet errors in the correctable section (if packet errors are what's listed).
I've also considered downgrading the firmware which I did in 2023 back to firmware 1.4.12.2. The other possibility is resetting the modem and asking Optimum to reprovision it. Would any of these solutions help?
Thank you in advance.
Current uptime is 4 days, but that's because we had power go out. Before that, uptime was over a week. Seems like reducing downstream voltages below 7 dBmV may have corrected the problem. I say MAY because now the upstream voltages are 1 dBmV higher than recommended on two of the channels. The other 2 are within specs. The tech put a splitter on to reduce the voltages. If this becomes problematic again, I'll switch the splitter for a 3 dB attenuator.
Thanks for everyone's help with this. I'll mark it as solved.
12 Replies
Can you please post the Event Logs data page as well.
Power levels are a bit too high.
Thanks for the quick response. Event Log is attached. I have a call in to the ISP for a technician to come out tomorrow and check line voltages. I'll update with any new information. I also have a 3db attenuator on order from Amazon.
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.
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
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.
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/
