RAX200 Multi-Gig Port to 2.5Gbps on Sagmecom F@st 3896 - limited to 1Gbps?

Netgear has set up a community forum specifically for the NightHawk RAX WiFi 6 Router products. Most of the people who watch that forum are more likely to have experience with NH router products and know how to work it better than those of us who follow this router forum. Might be more likely to find someone who has a solution if the question is posted there:
https://community.netgear.com/t5/Nighthawk-Routers-with-WiFi-6-AX/bd-p/en-home-routers-nighthawk-wifi-ax6

Please use this link to the main forum product list to review and choose where to make your posts. 
https://community.netgear.com/t5/NETGEAR-Forum/ct-p/en-netgear

Thank you.

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Simple_AK wrote:

Hello Community,

 

My ISP now provides 2Gbps speed.  They provided a Sagemcom F@st 3896 cable modem that has a 2.5Gbps port.

 

I have a 2.5Gbps USB-C ethernet adapter that I used for plugging my laptop directly into the 2.5Gbps port on the cable modem.  In that scenario, I'm getting speeds of about 1.5Gbps.  I used a Cat6 patch cable.

 

When I connect my new RAX200, via the Multi-Gig Port, to the same 2.5Gbps LAN port on my cable modem (in bridge mode) using a Cat6 patch cable, my speed test in the Nighthawk's web interface (in QoS settings), shows about 940Mbps.  The RAX200 is set to have the WAN preference as Multi-Gig Port (2.5/1Gbps).

 

I can't figure out why I'm not getting comparable speeds from the RAX200 when testing via the web interface at 192.168.1.1 as I did with my laptop directly connected to the cable modem.  I believe the speed test under QoS is testing the speed of the router's connection directly to the ISP and not that of my particular networked device, such as my laptop.  Correct?  QoS is disabled by the way.

 

I feel like something is limiting my RAX200 to 1Gbps...

 

Any thoughts or suggestions?

 

Thanks,

Josh

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