Just spoke with the Modem Manufacturer's tech support:
Alwin R: Could you please help me with the firmware version?
Me: The firmware Version is D30GW-EAGLE-1.5.3.0-GA-00-NOSH
Alwin R: Kindly contact your ISP & check whether they have updated any firmware recently. If YES, ask them to degrade the firmware.
So.... he's confirming they have the ability to do it, but when I call Cox tech support, they claim they can't, and I have to pay to get this service. Hopefully a Cox Moderator reads this post and can help me out = /
Thanks for responding Jonathan! I did a regular power cycle first, and when that didn't work I did a full factory reset - no change. Interestingly if I go into the main configuration page that lists everything, it does show my 5Ghz network SSID (marked as "disabled"), and when I click the hyperlink to the settings for it, it takes me to the page above that no longer has the 5GHz option available.
I sent an email with the requested info. Thanks again, and please let me know if there is anything else that is required!
Colleen - No, the factory reset did not bring the tabs back.
The firmware is certainly compatible with the Cox network (I still have internet! 🙂) but the ability to use 5Ghz wifi has been cut, which is a huge performance hit for me.
Looking at Reddit, several other users have reported the same issue, and they were actually able to "confirm" (as far as they could tell) that the issue resulted from a firmware update. One user even provided a screenshot of the firmware update in the router log. None of them were with Cox, so this isn't a Cox specific problem. Paranoid me half thinks that it's the ISP intentionally reducing the wifi performance on the gateway to encourage users to buy newer/faster hardware, but in reality it's probably either an innocent mistake of rolling out an insufficiently tested firmware release, or an actual hardware failure that somehow changes the GUI.
Thanks for the response, and thanks for looking into this!
