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C3700v2 – N600 WiFi Cable Modem Sudden Issues
I've noticed my router had a firmware update because the admin screen doesn't look exactly the same. I am not getting a lot of 408 type errors when trying to open a webpage...basically, I'm getting ...
I found a solution....
For starters, I didn't even know my lan connection was off and I was using all router-modem wifi the whole time since I got with Xfinity. The wifi has issues, there's no denying that, but things went back to normal once I enabled my lan connection and started actually using the ethernet cable I had running from my Netgear to my PC.
So now I'm not getting the 408s, pages not loading in or lagging in, under my lan connection. The only other issue I had was the website I'm building wasn't working under lan but I solved that by making changes in the Netgear port forwarding.
I do have wifi usage concerns still because my Firestick uses the 5g channel and my PC was using the 2.4g wifi channel. Since the lan connection uses the 5g, that places both the Firestcik and my PC on the 5g, which means if somebody is watching a movie or gaming on the Firestick, there could...maybe be bandwidth conflict....maybe not.
Anyway, my Firestick is the only thing that seems to use the wifi just fine on the 5g. I don't really use my phone for internet while at home, so I can't really say how bad the webpage loading will be using the wifi for that device or the pad.
Conclusion...
Use the local network (lan) computer connection with a Netgear router-modem combo, if you're on the PC that the Netgear runs to with the ethernet cable or other cable. If you're on a PC that is not connected directly to the Netgear and you have to use the wifi...
You're in serious trouble because what people were saying on Amazon about my Netgear model losing wifi stability over time, was obviously no lie! I bought it because the overall review rating was not that bad but clearly...Netgear has some issues as a brand.
PS, that warning at the top of my Netgear Admin page about not being connected to the internet is gone. Yay!
I have the same issue with this same model and it started at around the same time as the OP. I have internet but it is performing poorly in general and dropping frequently. This affects both wired and wireless users. Devices include PC laptops, Samsung phones and Playstation 4. All experience the drops and poor performance.
The router's management page shows a red bar with the message "Your Internet status is offline, please call your Internet service provider to activate.". I have contacted xfinity about this and confirmed no issue with the service. As I said I DO have internet service on the connected devices.
I performed a factory reset but it had no effect on the issue. Netgear support says no known issue with the firmware, but that seems like the likely suspect to me. I've tried everything. Please assist. Thanks.
Please post a copy and paste of the modems connection status page.
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.
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?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
andersv44 wrote:
I have the same issue with this same model and it started at around the same time as the OP. I have internet but it is performing poorly in general and dropping frequently. This affects both wired and wireless users. Devices include PC laptops, Samsung phones and Playstation 4. All experience the drops and poor performance.
The router's management page shows a red bar with the message "Your Internet status is offline, please call your Internet service provider to activate.". I have contacted xfinity about this and confirmed no issue with the service. As I said I DO have internet service on the connected devices.
I performed a factory reset but it had no effect on the issue. Netgear support says no known issue with the firmware, but that seems like the likely suspect to me. I've tried everything. Please assist. Thanks.
Connections Status page:
Same Coax as has been for 2 years, no splitter. Xfinity did run their tests and diagnostics from their end and found no issue.
I want to add that when I logged into the router's management page to get that screenshot - at that moment - all devices lost internet. The wifi networks SSIDs disappeared. All came back on about 2-3 minutes later. This also occurred several times the last few days while i was troubleshooting and doing the factory reset. Connect http to interface - internet drops. Not every time, but always at that instant of logging in. I don't think it's coincidence.
Thanks for the help.
Is there a section that gives channels being used and signal and power levels by chance?
Similar to what you see here? https://community.netgear.com/t5/Cable-Modems-Routers/CM1200-Intermittent-connection-issues-with-WOW-cable/m-p/2239274/highlight/true#M38832
Please don't post pictures with WAN IP address, MAC address or product serial numbers in public forums for security reasons.
