Figure 2-8 Core switches functioning as the gateway for wired and wireless users (three-layer network architecture) Configure CSS, stacking, MAD, and uplink and downlink Eth-Trunk interfaces on switches. Configure interfaces and VLANs on switches to implement Layer . Core switches set up a CSS that functions as the core of the entire campus network to implement high network reliability and forwarding of a large amount of data. With up to 48 10 GE downlinks and 40/100 GE uplinks, the S6730‑H series supports bandwidth-hungry access and spine layers—perfect for Wi‑Fi 6 APs, 4K/8K video, and virtualization workloads. They are designed to improve user experience, reduce the network operational expenditure (OPEX), and build secure and trustworthy campus networks. Huawei. The S6700 series switches (S6700s) are next-generation 10G box switches.