BCM56960A0KFSBG

Overview

The BCM56960A0KFSBG is a StrataXGS Tomahawk L3 Ethernet Switch ASIC designed for high-performance data center applications. It delivers a switching capacity of 3.2 Tbps with integrated 128 lanes of 25 Gbps SerDes. The device supports flexible port configurations, including 32x100GbE, 64x50GbE, or 128x25GbE. It features hardware offloading for VXLAN and NVGRE overlays, Smart-Buffer technology for dynamic cache management, and BroadView telemetry for network observability.

Feature Summary

• Hardware-accelerated overlay tunneling for VXLAN, NVGRE, and MPLS
• Dynamic Smart-Buffer cache allocation to prevent head-of-line blocking
• Integrated BroadView telemetry for real-time flow statistics and congestion detection
• Support for RoCEv2 protocols optimized for storage area networks

Applications

• Top-of-Rack (ToR) switches connecting 25G servers
• Leaf-Spine fabric interconnects in cloud data centers
• High-density aggregation switches for enterprise core networks
• Storage networking infrastructure supporting RDMA traffic

Procurement Notes

Verify the specific silicon stepping indicated by the suffix 'A0' against your system requirements. Confirm that the large FBGA package matches your PCB layout capabilities. Ensure compatibility with the required SDK version for intended protocol support. Validate thermal design specifications for the target chassis environment before procurement.

Selection Notes

Select this component when deploying 25G server access or 100G uplink architectures requiring 3.2 Tbps throughput. Consider alternative models if higher bandwidth or PAM4 interfaces are necessary. Evaluate power consumption constraints relative to the 28nm process node. Verify software ecosystem support for OpenFlow or proprietary NOS implementations.

Part Context

This part belongs to the Broadcom StrataXGS Tomahawk generation, representing an early implementation of high-density 25G SerDes integration. It serves as a foundational architecture for subsequent generations like Tomahawk 2 and 3. The component establishes baseline capabilities for modern data center switching fabrics.

Replacement Considerations

Direct functional equivalents include the BCM56960B0KFSBG with updated silicon stepping. Higher performance alternatives within the same family include the BCM56965 series. Cross-generation migration requires significant PCB redesign due to interface evolution.