Broadcom BCM957502A1020D 25GbE OCP NIC 3.0 Adapter D Variant

Brand: Broadcom | Category: Network Adapters & NICs

SKU: BCM957502A1020D25GBEOCPNICD | Part #: BCM957502A1020D | MPN: BCM957502A1020D

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The Broadcom BCM957502A1020D is a purpose-built 25GbE dual-port network adapter designed for hyperscale data centres, AI infrastructure, and enterprise storage deployments where hardware offload directly impacts workload performance. What separates this card from commodity network interfaces is the depth of its offload architecture: RoCEv2 for RDMA operations, TCP/IP offload, Large Send Offload (LSO), Large Receive Offload (LRO), Receive Side Scaling (RSS), VXLAN and NVGRE tunnelling offload, and full checksum acceleration. These capabilities are not marketing features—they are the difference between a NIC that simply passes packets and one that actively reduces CPU utilization, latency, and jitter in workloads that demand it. Network engineers and infrastructure architects who deploy AI training clusters, distributed storage systems (NVMe-oF, iSER), or latency-sensitive applications understand that offload capabilities determine whether you're throwing away compute cycles to the network stack or reclaiming them for the workload itself.

Built around the Broadcom BCM57502 controller and housed in the OCP NIC 3.0 mezzanine form factor, the BCM957502A1020D fits directly into OCP-compliant servers without requiring PCIe slots—a critical advantage in dense, modular deployments where slot count is limited or where you want to preserve PCIe lanes for NVMe or GPU connectivity. Each of the two 25GbE ports runs over SFP28 optics, supporting both short-reach (25GBASE-SR) and long-reach (25GBASE-LR) deployments, as well as direct-attach copper cables (25GBASE-CR) for in-rack connectivity. The host interface is PCIe Gen 4 x8, delivering more than enough bandwidth to sustain line-rate throughput on both 25GbE ports simultaneously without bottlenecking. This is particularly important in storage and AI scenarios where you cannot afford a CPU-to-network bandwidth mismatch.

Data centre network teams rely on the Broadcom BCM957502A1020D's advanced flow control and quality-of-service features to maintain predictable latency in converged storage and compute fabrics. IEEE 802.3x flow control, Data Center Bridging eXtension (DCBX), Priority Flow Control (PFC), and Enhanced Transmission Selection (ETS) allow the card to negotiate priority queues with switches and other endpoints, ensuring that storage or real-time traffic never gets starved by bulk data movement. LLDP neighbour discovery helps automation and monitoring tools discover and profile the adapter without manual intervention. Support for jumbo frames up to 9600 bytes reduces the CPU overhead of fragmentation and reassembly in throughput-heavy workloads. Wake on LAN is included for power-efficient fleet management. The card also implements SR-IOV, which means a single physical adapter can present multiple virtual network functions to guest VMs or containers, enabling secure multi-tenant deployments without per-tenant hardware.

Operating system support spans the entire enterprise and cloud stack: Windows Server, Red Hat Enterprise Linux (RHEL), SUSE Linux Enterprise Server (SLES), Ubuntu LTS, and VMware ESXi. This breadth ensures that whether you are running bare-metal storage appliances, hypervisor-based converged infrastructure, or cloud-native container platforms, the Broadcom BCM957502A1020D integrates without compatibility friction. Broadcom provides mature, production-tested drivers across all these platforms, backed by enterprise support contracts. The card's network management interface includes DCBX, PFC, ETS, and LLDP for programmatic discovery and configuration—essential when you are provisioning hundreds or thousands of servers across multiple data centres and cannot rely on manual switch-by-switch configuration.

For organizations in the UAE, GCC, and broader APAC regions seeking 25GbE OCP-compliant NICs with serious hardware offload for data centre and AI infrastructure, Omnixon Global stocks the Broadcom BCM957502A1020D and can integrate it into your procurement roadmap. We supply platform reference designs, assist with compatibility verification for your target servers, and maintain inventory levels that support both greenfield deployments and growth refreshes. Contact our sales and engineering teams to discuss your network tier requirements, optics choices, and timeline. Request a detailed quotation for the BCM957502A1020D and partner with a distributor that understands hyperscale infrastructure.

Offload Architecture & Performance Specifications

• Dual 25GbE ports with SFP28 optics; supports 25GBASE-SR (100m), 25GBASE-LR (10km), and 25GBASE-CR direct-attach copper
• RoCEv2 RDMA offload for ultra-low-latency distributed applications including HPC, AI training, and NVMe-oF storage
• TCP/IP, LSO, LRO, RSS, VXLAN, NVGRE, and checksum offload to reduce per-packet CPU overhead
• PCIe Gen 4 x8 host interface delivering full 50Gbps aggregate throughput without saturation
• IEEE 802.3x flow control, DCBX, PFC, and ETS for QoS and priority negotiation in converged fabrics
• SR-IOV support for secure multi-tenant virtualization and container deployments
• Jumbo frame support up to 9600 bytes and hardware-assisted Wake on LAN