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Nighthawk cax30 dropping internet connectivity almost daily
The first couple months after purchasing the Nighthawk CZX30 router it was working great, but the last couple months it's started having major connectivity issues, sometimes as frequently as several times a day (and usually at least once or twice a week). All my devices are still able to connect to it, but randomly throughout the day they will stop having internet connectivity. Usually it's quite sudden, but sometimes it seems to be spotty for a while before completely stopping (although it's hard to know if that's partially the internet provider -- Xfinity). When I reboot the router (unplugging it and plugging it back in) it starts working again.
I do not have "traffic meter" enabled, as I know that was an issue (although it didn't seem to affect mine, as far as I could tell, since I never had it enabled). Firmware is V2.1.3.10
Here's a screenshot of the current event log file. I recently had to restart it, as the internet cut out. Any suggestions?
3 Replies
Please post a copy and paste of the modems connection status full page page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-routerAny Critical, Errors or Warnings need in the event log indicates a signal line issue from the ISP service box and needs to be reviewed by the ISP and resolved.
This is the status right now (when it's working)...
Cable Diagnostic Status: Good Action: Your setup looks fine. If you are still experience an internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info. Internet Access: (green) Downstream Status: (green) Upstream Status: (green) Frequency start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency <tabindex=-1>Startup Procedure</tabindex=-1> Procedure Status Comment Acquire Downstream Channel 435000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD IPv6 only <tabindex=-1>Downstream Bonded Channels</tabindex=-1> Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectabables 1 Locked 256 QAM 1 435000000 Hz -2.8 dBmV 41.8 dB 63874 0 2 Locked 256 QAM 2 441000000 Hz -3.1 dBmV 41.8 dB 63140 0 3 Locked 256 QAM 3 447000000 Hz -2.9 dBmV 41.9 dB 63468 0 4 Locked 256 QAM 4 453000000 Hz -2.9 dBmV 41.8 dB 63781 0 5 Locked 256 QAM 5 459000000 Hz -3.4 dBmV 41.6 dB 64584 2613 6 Locked 256 QAM 6 465000000 Hz -3.0 dBmV 41.8 dB 64015 921 7 Locked 256 QAM 7 471000000 Hz -2.8 dBmV 41.9 dB 61158 270 8 Locked 256 QAM 8 477000000 Hz -2.4 dBmV 42.2 dB 59259 0 9 Locked 256 QAM 9 483000000 Hz -2.2 dBmV 42.3 dB 58599 0 10 Locked 256 QAM 10 489000000 Hz -2.5 dBmV 42.3 dB 58074 0 11 Locked 256 QAM 11 495000000 Hz -2.5 dBmV 42.4 dB 58148 0 12 Locked 256 QAM 12 501000000 Hz -2.0 dBmV 42.5 dB 58234 0 13 Locked 256 QAM 13 507000000 Hz -2.1 dBmV 42.5 dB 56772 0 14 Locked 256 QAM 14 513000000 Hz -2.1 dBmV 42.6 dB 56477 0 15 Locked 256 QAM 15 519000000 Hz -1.8 dBmV 42.7 dB 56251 0 16 Locked 256 QAM 16 525000000 Hz -1.9 dBmV 42.8 dB 54080 0 17 Locked 256 QAM 17 531000000 Hz -1.8 dBmV 43.0 dB 52160 0 18 Locked 256 QAM 18 537000000 Hz -1.5 dBmV 43.0 dB 52088 0 19 Locked 256 QAM 19 543000000 Hz -1.6 dBmV 43.0 dB 51506 0 20 Locked 256 QAM 20 549000000 Hz -1.1 dBmV 43.2 dB 51202 0 21 Locked 256 QAM 21 555000000 Hz 0.8 dBmV 43.0 dB 49318 0 22 Locked 256 QAM 22 561000000 Hz 0.4 dBmV 43.3 dB 49420 0 23 Locked 256 QAM 23 567000000 Hz 0.5 dBmV 43.3 dB 48593 0 24 Locked 256 QAM 24 573000000 Hz 0.7 dBmV 43.2 dB 47290 0 25 Locked 256 QAM 25 579000000 Hz 0.8 dBmV 43.2 dB 46558 0 26 Locked 256 QAM 26 585000000 Hz 0.5 dBmV 43.3 dB 45735 0 27 Locked 256 QAM 27 591000000 Hz 0.3 dBmV 43.1 dB 45216 0 28 Locked 256 QAM 28 597000000 Hz 0.2 dBmV 43.3 dB 43858 0 29 Locked 256 QAM 29 603000000 Hz 0.3 dBmV 43.2 dB 43261 0 30 Locked 256 QAM 30 609000000 Hz 0.5 dBmV 43.2 dB 42796 0 31 Locked 256 QAM 31 615000000 Hz 0.5 dBmV 43.0 dB 43554 0 32 Locked 256 QAM 32 621000000 Hz 0.2 dBmV 42.6 dB 42961 0 <tabindex=-1>Upstream Bonded Channels</tabindex=-1> Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 2 5120 Ksym/sec 16400000 Hz 46.5 dBmV 2 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 46.5 dBmV 3 Locked ATDMA 4 5120 Ksym/sec 29200000 Hz 46.0 dBmV 4 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 46.0 dBmV 5 Locked ATDMA 6 5120 Ksym/sec 40400000 Hz 46.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV <tabindex=-1>Downstream OFDM Channels</tabindex=-1> Channel Channel ID Frequency Power SNR/MER Active Subcarrier Number Range Total Codewords Uncorrectable Codewords 1 159 702000000 Hz 3.4 dBmV 41.7 dB 1126 ~ 2969 856229075 0 2 0 0 Hz 0 dBmV 0 dB 0 ~ 0 0 0 <tabindex=-1>Upstream OFDMA Channels</tabindex=-1> Channel UpstreamIsMuted Ranging Status Subcarrier Zero Frequency Active Subcarrier Number Range Symbols Per Frame Tx Power 1 Other 0 MHz 0 ~ 0 0 0 dBmV 2 Other 0 MHz 0 ~ 0 0 0 dBmV Extended Upstream Transmit Power Enable Extended Upstream Transmit Power Current System Time: 2023-05-15 10:58:17System Up Time: 2Days, 20:38:47You have a ton of correctables and some un-correctables. Means the modem is going lots of processing to make things work coming in from the ISP side and these should be mostly all zeros.
Power levels or good however seem a bit all over the place.
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/Have the ISP check the event logs for those criticals, errors and warnings. They need to resolve them.
