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51.2T Ethernet Fabric Solution for B300 AI Clusters

RoCEv2 lossless networking delivers stable, low-latency, congestion-free AI cluster performance

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Independent B2B sourcing context

Source AI and HPC interconnect components by architecture

SwitchInfra organizes switches, transceivers, network adapters, and fiber or copper cabling for Ethernet, RoCE, and InfiniBand project discovery and RFQ preparation.

Verification boundary

NVIDIA and Mellanox names describe buyer-specified platform families only and do not imply official affiliation or compatibility. Confirm the exact OPN or SKU, platform, software or firmware, topology, availability, delivery, warranty, and terms in technical review and RFQ.

Compare before RFQ

  • Ethernet, RoCE, or InfiniBand architecture and topology
  • Data rate, form factor, reach, connector, and cable type
  • Switch and host-adapter platform with exact part identifiers
  • Software or firmware, FEC, breakout, and deployment constraints
What should an AI fabric sourcing request specify?

Specify the network architecture, topology, switch and host-adapter identifiers, port and data rate, optics or cable reach, connector, software or firmware context, quantities, and deployment schedule.

Can SwitchInfra confirm NVIDIA or Mellanox compatibility from this page?

No. Those names identify buyer-requested platform families only. Compatibility requires verification of the exact OPN or SKU, platform, software or firmware, topology, and link components.

51.2T Ethernet Fabric Solution for B300 AI Clusters

SwitchInfra 51.2T Ethernet fabric solution is purpose-built for NVIDIA B300 GPU clusters, delivering 800G port-to-port connectivity with RoCEv2 lossless networking. The dual-plane architecture improves scalability, reliability, and GPU communication efficiency. A dedicated RDMA storage network isolates storage and compute traffic, reduces CPU overhead, and accelerates AI training. Powered by Tomahawk 5 silicon and PicOS®, the solution provides 51.2 Tbps of switching capacity per chassis with intelligent congestion control, deep buffers, and hardware-accelerated load balancing to reduce network bottlenecks in large-scale AI training deployments.

Dual-Plane Architecture

Independent compute and storage planes isolate RDMA traffic, reduce contention, and improve GPU-to-GPU communication stability across large B300 clusters.

51.2T Switching Capacity

Tomahawk 5 based 800G switches provide high-density spine-leaf bandwidth for AI clusters that need predictable east-west throughput.

Dedicated RDMA Storage

A dedicated RoCEv2 storage fabric keeps data pipelines fast and predictable while reducing CPU overhead during distributed training.

Key Benefits

End-to-End 800G Fabric

800G switching and optics increase per-rack bandwidth density, reducing the number of links required for B300 cluster expansion.

Lossless RoCEv2 Transport

PFC, ECN, DCQCN, and deep buffers help sustain lossless RDMA performance during bursty AI training traffic.

Lower TCO with LPO

LPO optics reduce optical module power and cooling demand while maintaining high-density 800G interconnect performance.

Accelerated Provisioning

AmpCon-DC automates fabric deployment, validation, and telemetry so operators can bring AI clusters online faster.

Solution Architecture

The 51.2T Ethernet fabric uses a dual-plane spine-leaf design. The compute plane carries GPU east-west communication over lossless RoCEv2, the storage plane isolates RDMA storage traffic, and the management plane automates deployment and monitoring through AmpCon-DC.

Compute Plane

800G spine and leaf switches connect GPU servers with lossless RoCEv2, congestion control, and dynamic load balancing.

Storage Plane

Dedicated 100G/200G/400G RDMA storage links isolate storage traffic and protect training jobs from I/O contention.

Management Plane

AmpCon-DC provides zero-touch provisioning, topology visibility, telemetry, and policy-driven lifecycle operations.

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Ready to scale your B300 AI clusters?

SwitchInfra 51.2T Ethernet fabric delivers 800G lossless RoCEv2 with dual-plane architecture for maximum GPU utilization. Connect with our HPC architects for a custom design.

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