Re: RBR850/RBS850 WiFi slow on a 1GIG fiber (getting 90Mbs up/down)

I have the exact same issue with the WAN port speed capped at 100/Full after a firmware update. TL;DR verdict - the firmware update capped the WAN port speed of the router to 100M/Full, and nothing I’ve found can fix it.

Setup:

AT&T fiber - Arris BGW210-700. WiFi radios disabled

RBR850 set to AP mode

Working fine, speed tests are blazing fast at firmware level that came pre-installed: 3.2.11.2_1.2.13

WAN port speed showing 1000/Full

Using factory provided cat 5E cable from wan port to BGW210

What has been done:

Noticed my firmware was way out of date - getting the service unreachable errors so not updating automatically
Manually updated satellite to latest 4..6.7.13 - success
Manually updated router to latest 4.6.7.13 - success
Speedtest: 94 mb/s up & down
Used new cat 6 cable to connect computer direct to BGW210 - 800-900 mb/s speedtest

Swapped factory cable with confirmed cat 6 cable from Orbi WAN to BGW210

WAN port still showing 100/Full, speedtest confirms with ~94 mb/s

BGW210 showing 1GB port speed - configured for auto negotiate
Set BGW210 port to 1GB Full duplex - no change to speeds or ports speed
Attempted to revert firmware back to same version as before - able to revert satellite, but no option to revert router. Brought satellite back up to same version as router. 

Factory reset, reconfigure using Orbi app.

Same results - WAN port still showing 100/Full, speed tests still ~94 mb/s.

Powered off expensive Orbi paperweights and re-enabled AT&T WiFi radios

Conclusion: it’s not the cable, it’s not the AT&T router. It was the firmware that spiked it and rendered the RBR850 as fast as a NIC from 1992. And with no way to manually force the port to 1000/Full, or find any viable fixes here or anywhere else, this is yet another NetGear product that is not what I thought I was buying. Of course my support ran out about 60 days before this fiasco so I’m dead in the water with the Orbi. Seemed a great product until I went to update it. 

If anyone has anything else, I’d love to hear it. Otherwise - NetGear OUT.