Slow Wired Speeds for Orbi 770

Wow. I would be on the phone to Netgear as well.

To recap:

Netgear CM2000 Cable modem, connected to

Orbi RBE771 Router WAN port.  Show Statistics reports connection as 2500M/Full

Orbi RBE771 Router.  Ookla Speed Test reports 1.4G

Orbi RBE771 Router LAN port. Show Statistics reports connection as 1000M/Full (because whatever is connected to this port has a gigabit Ethernet port not capable of any higher speed)

Device*** Ethernet Port.  Ookla Speed Test (web site or application?) report varying speeds from 86Mbps to 256Mbps.

More than one cable has been used for the Orbi to device connection.

More than one Router LAN port has been used.

*** Devices tested include iMac and Apple TV, all using Ookla web site or Ookla app.

One common suggestion is to temporarily connect the test device (iMac) directly to the CM2000 modem, which removes the Orbi from the situation.  It is not entirely clear (to me) if this step was done.  (I often get tangled up in long discussions.)

Another suggestion is to document which specific Ookla server is being used for each test. Ookla has (literally) hundreds of servers around the world and it is not entirely clear how their software decides which to use for a specific test.

When plugged in to the cable modem I get about 940 Mbs.

Very accurate description.

So trying a factory reset and setup from scratch with a ethernet connected PC only, don't enable any Armor, IPv6, Access Controls, or Traffic meter. Power cycling the CM modem OFF for 1 minute then back on then after the RBR is setup again, speed testing with Ooklas installable speed test app, does the speed still result in being slow? 

Recommend using this to walk thru the reset process:

https://community.netgear.com/t5/Orbi-WIFI-6-AX-AND-Wi-Fi-6E-AXE/Procedure-for-Factory-reset-of-RBS850/m-p/2356834/highlight/true#M52575

Soon after the system is setup, run the speed test.

Let us know if the issue remains. 

Thank you.  will try later tday.