Download and Upload Speeds Hindered After RBR50 Router

[DGSmith]

I just upgraded my internet service to 1Gb/s.  Speed are good coming from my ISP modem.  But they are drastically reduced after the ORBI Router.

What is the problem or how do I correct?

[FURRYe38]

What is the Mfr and model# of the ISP modem the NG router is connected too?

[DGSmith]

Mfr looks like ZHONE.  I do not see a model number.

ISP is Mainstream Fiber Networks (msfiber.net).

[DGSmith]

My Firmware is up-to-date I beleive.

v2.5.1.8

[DGSmith]

ISP just responded:

Zhone 2301

[FURRYe38]

Ok, checking to see if it has a router built in, I don't see one:

https://dasanzhone.com/product/znid-gpon-2301/

Though curious about it's built in QoS features which wondering if it could be causing some issues. 

Power OFF the ONT for 1 minute then back on. Factory reset the RBR and walk thru the setup wizard with a wired PC. Complete the setup and run a speed test with Ooklas installable windows or max speed test app. Do not enable Armor, Access controls, Circle, QoS speedtest or Traffic meter. Just run a speed test thru the RBR with a wired PC. Let us know your results.