WD9875 Ultra High-Density 800G Switches

The switch delivers high-density 800G/400G ports with a forwarding capacity of up to 102.4 Tbps, enabling efficient and scalable server connectivity for high-end data centers without oversubscription. It also supports flexible port splitting and speed downgrading, allowing configurations such as 800G to 2×400G or 4×200G, as well as operation at 400G speed. Additionally, the switch supports full-port deployment of LPO optical transceiver modules and allows intermixing of LPO and DSP transceiver modules, providing greater flexibility for different deployment scenarios.

The switch offers a wide range of advanced data center capabilities to support modern cloud and high- performance environments. It supports MP-BGP EVPN (Multiprotocol Border Gateway Protocol Ethernet Virtual Private Network), which can function as the VXLAN control plane to simplify VXLAN configuration, reduce traffic flooding, and eliminate full-mesh requirements between VTEPs through the use of BGP Route Reflectors (RR). In addition, the switch supports RoCEv2 networks, leveraging technologies such as Priority-based Flow Control (PFC), Explicit Congestion Notification (ECN), and Enhanced Transmission Selection (ETS) to enable low-latency, lossless RDMA applications and high-speed computing services.

The switch supports WatchDog Multi-Chassis Link Aggregation (M-LAG), which allows links from multiple switches to be aggregated into a single logical connection, enabling device-level link backup and improving network reliability. This feature is particularly useful for servers connected to two access switches, ensuring node redundancy. M-LAG also simplifies network topology and spanning tree configuration by virtualizing two physical switches into one logical device. In addition, it supports independent upgrades of DR member devices to minimize traffic disruption and uses a keepalive link to detect multi-active conditions, ensuring that only one device forwards traffic if the DR system splits.