OpenWrt Build for SQM QoS

SQM (Smart Queue Management) is designed to actively manage network traffic to eliminate bufferbloat and reduce latency. It works by prioritizing time-sensitive packets, such as online gaming or VoIP, over bulk downloads. This is essential for maintaining a stable internet connection during heavy bandwidth usage.

Yes, this specific OpenWrt SBC build is highly optimized to run on single-board computers like the Raspberry Pi 4. The Pi's ARM architecture easily handles the CPU-intensive SQM algorithms like cake or fq_codel. This allows users to build a highly effective DIY router for a fraction of the cost of enterprise gear.

Depending on the specific single-board computer used, an OpenWrt router can typically handle gigabit speeds, though enabling heavy SQM routing can lower that threshold. A Raspberry Pi 4 can comfortably route 500 Mbps to 1 Gbps while running SQM QoS. The actual limit often depends on your specific configurations and CPU overhead.

SQM is configured through the LuCI web interface by installing the luci-app-sqm package. You simply set your download and upload speeds to about 90-95% of your actual ISP provisioned speeds. This intentional speed reduction leaves enough headroom for the queue to prevent local network congestion.