{"product_id":"mellanox-nvidia-cx4421a-connectx-4-lx-dual-port-sfp28-25gbe-ocp-2-0-mezzanine-network-interface-card-nic-mcx4421a-acun","title":"Mellanox NVIDIA CX4421A ConnectX-4 Lx Dual Port SFP28 25GbE OCP 2.0 Mezzanine Network Interface Card (NIC) MCX4421A-ACUN","description":"\u003cp\u003e\u003c!--StartFragment--\u003e\u003cmeta content=\"text\/html; charset=us-ascii\" http-equiv=\"Content-Type\"\u003e\n\u003cstyle type=\"text\/css\"\u003ea {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003c\/p\u003e\n\n\u003ch1 style=\"text-align: justify;\"\u003eMellanox NVIDIA CX4421A ConnectX-4 Lx Dual Port SFP28 25GbE OCP 2.0 Mezzanine Network Interface Card (NIC) MCX4421A-ACUN\u003c\/h1\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eEnhance your Open Compute infrastructure with the \u003cstrong\u003eMellanox NVIDIA ConnectX-4 Lx EN MCX4421A-ACUN\u003c\/strong\u003e, a high-performance \u003cstrong\u003edual-port 25GbE OCP 2.0 mezzanine Network Interface Card (NIC)\u003c\/strong\u003e designed for cloud, virtualization, hyperscale, and enterprise data center environments. Featuring two SFP28 ports and built on the reliable ConnectX-4 Lx architecture, this adapter delivers low-latency connectivity, advanced network acceleration, and efficient virtualization performance for modern workloads.\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe MCX4421A-ACUN supports up to \u003cstrong\u003e25GbE per port\u003c\/strong\u003e and is backward compatible with existing \u003cstrong\u003e10GbE SFP+ infrastructure\u003c\/strong\u003e, making it an ideal upgrade path for evolving network environments. Advanced offload technologies including \u003cstrong\u003eRoCE v1\/v2, SR-IOV, VXLAN, NVGRE, GENEVE, and Erasure Coding acceleration\u003c\/strong\u003e help reduce CPU overhead while maximizing throughput and application performance.\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003ePurpose-built for \u003cstrong\u003eOCP 2.0 Type 1 mezzanine slots\u003c\/strong\u003e, this adapter integrates directly into compatible Open Compute servers without consuming valuable PCIe expansion slots.\u003c\/p\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMellanox NVIDIA ConnectX-4 Lx EN Controller\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eModel: \u003cstrong\u003eMCX4421A-ACUN\u003c\/strong\u003e\n\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDual-Port 25GbE Ethernet Connectivity\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eTwo SFP28 Ports\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOCP 2.0 Type 1 Mezzanine Form Factor\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePCIe 3.0 x8 Interface\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBackward Compatible with 10GbE SFP+\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRoCE v1 \u0026amp; RoCE v2 RDMA Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSR-IOV Virtualization Acceleration\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVXLAN, NVGRE \u0026amp; GENEVE Offloads\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHardware Erasure Coding Acceleration\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eUEFI Enabled Firmware\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOptimized for NVMe-oF, iSCSI, and iSER Deployments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e NVIDIA Mellanox\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e MCX4421A-ACUN\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eController:\u003c\/strong\u003e ConnectX-4 Lx EN\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003e OCP 2.0 Type 1 Mezzanine\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e PCIe 3.0 x8\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003ePorts:\u003c\/strong\u003e 2 x SFP28\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eSpeed:\u003c\/strong\u003e Up to 25GbE per port\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eMaximum Aggregate Bandwidth:\u003c\/strong\u003e 50Gbps\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eProtocol Support:\u003c\/strong\u003e Ethernet Only\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eHost Management:\u003c\/strong\u003e Not Supported (ACUN Variant)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003ePort Power Output:\u003c\/strong\u003e Up to 1.5W per SFP28 Port\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eFirmware:\u003c\/strong\u003e UEFI Enabled\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eCompatible Server Platforms\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe MCX4421A-ACUN is specifically designed for systems featuring an \u003cstrong\u003eOCP 2.0 Type 1 mezzanine slot\u003c\/strong\u003e, including:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eQuanta QCT Servers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eWiwynn Data Center Platforms\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eZT Systems Nodes\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eInspur OCP Servers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOpen Compute Project (OCP) Infrastructure\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSelect Dell PowerEdge C-Series Cloud Servers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHyperscale and Multi-Node Data Center Platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eNot Compatible With\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eStandard PCIe x8 or PCIe x16 Slots\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell rNDC Network Daughter Card Slots\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHPE FlexibleLOM Interfaces\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eStandard Tower Servers and Workstations\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLenovo ThinkSystem PCIe Adapters\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOCP 3.0 SFF and TSFF Slots\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eSupported Cables \u0026amp; Transceivers\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSFP28 DAC Copper Cables\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSFP28 Active Optical Cables (AOC)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e25GbE SFP28 SR and LR Optical Transceivers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e10GbE SFP+ Optical Modules\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePassive and Active Twinax Cables\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLC Duplex Fiber Optic Connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eOperating System Compatibility\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eSupported by major enterprise and cloud operating systems:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVMware ESXi 7.x and 8.x\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMicrosoft Windows Server 2019 \u0026amp; 2022\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRed Hat Enterprise Linux (RHEL)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRocky Linux\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAlmaLinux\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eUbuntu Server LTS\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDebian Linux\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSUSE Linux Enterprise Server (SLES)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eIdeal Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOpen Compute Project (OCP) Deployments\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCloud Data Centers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVirtualization Clusters\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHyper-Converged Infrastructure\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eNVMe over Fabrics (NVMe-oF)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSoftware-Defined Storage\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise Networking\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHigh-Density Compute Environments\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAI and Machine Learning Infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Mellanox","offers":[{"title":"Default Title","offer_id":55898186055753,"sku":"MCX4421A-ACUN","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/3868\/3209\/files\/b45c4f52-e307-5310-87e6-b3c3f28367df.png?v=1786851302","url":"https:\/\/parts.theserverstore.com\/products\/mellanox-nvidia-cx4421a-connectx-4-lx-dual-port-sfp28-25gbe-ocp-2-0-mezzanine-network-interface-card-nic-mcx4421a-acun","provider":"The Server Store Parts","version":"1.0","type":"link"}