Netgear R6900 - Nighthawk AC1900 Smart WiFi Router User Manual (en)

Prioritize Internet Traffic With Quality of Service
You can use Quality of Service (QoS) to assign a high priority to gaming and streaming video from the Internet.
Figure 7. You can prioritize downstream traffic, upstream traffic, or both
Optimize Internet Gaming With Upstream QoS
Upstream Quality of Service (QoS) assigns a high priority to Internet traffic from your Xbox gaming system.
Optimize Performance
Nighthawk AC1900 Smart WiFi Router Model R6900