The RTL8309SC-GR is a single port Gigabit Ethernet switch chip developed by Realtek. It is an advanced switch processor that combines innovative architecture and silicon technology to enable networking devices to deliver high-speed, low-power, cost-efficient switching solutions. The RTL8309SC-GR chip is designed for use in routers, switches and embedded applications for home and small office settings, as well as for industrial, automotive, IoT and SDN applications. The chip supports up to 32K MAC addresses, VLANs, QoS, port mirroring, port rate limiting and link aggregation, providing all the features needed to support a high-performance, secure, reliable and robust network.