NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC

Meet the NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC, a high-performance dual-port 25GbE adapter engineered to accelerate modern data-center networks. As a proud member of NVIDIA’s award-winning ConnectX family, this SmartNIC delivers exceptional throughput, ultra-low latency, and robust offload capabilities that reduce CPU overhead and boost application performance across virtualization, cloud, AI, and HPC workloads. With PCIe Gen 3.0/4.0 x8 host connectivity, it slots into today’s enterprise servers with seamless compatibility and scalable bandwidth that grows with your infrastructure. Whether you’re building a hyper-converged environment, a high-velocity data lake, or a large-scale virtualized platform, ConnectX-6 Lx EN brings agility, reliability, and efficiency to every network transaction, from microseconds of latency-sensitive traffic to multi-terabit-scale data transfers.

• Dual 25GbE ports for scalable bandwidth and flexible network architectures. This configuration enables high-density uplinks, efficient NIC teaming, and streamlined east-west traffic within dense server racks, helping you consolidate networks without compromising performance.
• PCIe Gen 3.0/4.0 x8 host connectivity for broad compatibility with modern servers and future-ready throughput. The flexible PCIe interface allows easy integration into a wide range of server generations, ensuring you can upgrade your infrastructure without hardware rework.
• Advanced offload capabilities that accelerate data-path operations while preserving CPU resources for compute tasks. Features like TCP/IP offloads, RDMA over Converged Ethernet (RoCE), VXLAN and NVMe-oF support enable high-performance storage, virtualization, and networking workloads with minimal CPU intervention.
• Comprehensive virtualization support for modern data centers, including SR-IOV and multi-queue I/O virtualization. These features deliver near-native performance for virtual machines and containers, enabling higher VM density and more predictable network performance under load.
• Software and ecosystem readiness with broad OS support and NVIDIA’s software stack. The ConnectX-6 Lx EN integrates with industry-standard drivers and toolchains, helping you manage, optimize, and scale your network for cloud, data center, and HPC deployments.

Technical Details of NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC

• Ports: 2 x 25GbE network interfaces, designed to deliver high throughput and low latency for data-center workloads.
• Host interface: PCIe Gen 3.0/4.0 x8, enabling compatibility with a wide range of server platforms and delivering ample bandwidth for demanding traffic patterns.
• Form factor: PCIe Add-In Card (AIC) with options for standard full-height and low-profile deployments to fit different server chassis.
• Offloads and acceleration: TCP/IP offloads, RoCE v2 RDMA support, VLAN offload, VXLAN offload, NVMe-oF acceleration, and other network-virtualization features to streamline performance.
• Virtualization capabilities: SR-IOV and Multi-Queue I/O virtualization to maximize VM density and maintain predictable performance under multiplexed workloads.
• Software compatibility: Broad driver and software ecosystem support across Linux and Windows environments, compatible with NVIDIA’s DP/DK, Linux kernel drivers, and common virtualization platforms.

How to install NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC

• Power down the system and unplug power to ensure a safe installation environment.
• Open the server chassis and locate an available PCIe x8 slot suitable for a PCIe Add-In Card. Remove the slot cover if required.
• Insert the ConnectX-6 Lx EN card firmly into the PCIe x8 slot and secure the bracket with a screw to prevent movement.
• Connect the two 25GbE network cables to the NIC ports. Ensure cables are properly seated and routed to avoid bending or stress on connectors.
• Power on the server and install the latest NVIDIA drivers and software package for your operating system. Follow the vendor or NVIDIA installation instructions to complete the software setup.
• Reboot if prompted, verify link status and negotiated speeds, and begin configuring advanced features such as SR-IOV, ROCE, VXLAN/VNET offloads, and NVMe-oF as required by your workload.

Frequently asked questions

• What is the NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC?

  The NVIDIA ConnectX-6 Lx EN Ethernet SmartNIC is a dual-port 25GbE network adapter designed for servers, delivering hardware-accelerated networking, virtualization offloads, and high-throughput data paths. It is part of the award-winning ConnectX family and is optimized for modern data centers, cloud deployments, and high-performance workloads.

• What workloads benefit most from this SmartNIC?

  Networking-heavy workloads such as virtualized environments (VMware, Hyper-V, KVM), containerized deployments, RDMA-enabled storage (NVMe-oF), software-defined networking (SDN), and high-performance computing benefit from the dual 25GbE bandwidth, hardware offloads, and virtualization features that reduce CPU overhead and improve latency profiles.

• Is ConnectX-6 Lx EN compatible with common hypervisors and operating systems?

  Yes. The SmartNIC is designed for broad OS support including Linux distributions and Windows, and it works with major hypervisors, offering drivers and management tooling that integrate with standard virtualization workflows and orchestration platforms.

• Does it support RDMA and NVMe over Fabrics?

  Yes. The adapter includes hardware offloads and support for RoCE v2 RDMA, as well as NVMe-oF acceleration, enabling low-latency, high-throughput storage and computing workflows in data-center environments.

• What about network virtualization features like VXLAN and SR-IOV?

  The ConnectX-6 Lx EN offers virtualization features such as SR-IOV and VXLAN offloads, which help achieve scalable multi-tenant networking with low CPU overhead and consistent performance across virtual machines and containers.