NVIDIA Spectrum-4 SN5400 - 64×400GbE QSFP56-DD 2×25GbE SFP28 2U C2P Airflow Open Ethernet Switch

NVIDIA Spectrum-4 SN5400 is a next-generation 400GbE Ethernet switch built on the powerful Spectrum-4 ASIC, designed for AI factories, large-scale GPU clusters, high-performance storage networks, and modern cloud data centres. With 64 × OSFP 400GbE ports in a compact 2U form factor, the SN5400 delivers extreme bandwidth with a total switching capacity of 25.6 Tbps, providing the throughput required for NVIDIA HGX systems, multi-rack AI workloads, hyperscale fabrics, and high-intensity east-west traffic.

Engineered for deterministic low latency and full wire-speed performance, the SN5400 supports advanced congestion control, deep network visibility, and telemetry features essential for large AI and HPC environments. Open-networking flexibility with Onyx, Cumulus Linux, and SONiC, combined with hot-swappable power and cooling modules, ensures maximum reliability and easy integration into high-density 400G data-centre deployments.

KEY FEATURES:

• 64 × 400GbE OSFP Ports: High-density 400G connectivity for AI and cloud fabrics.
• 25.6 Tbps Switching Capacity: Full non-blocking throughput for large data-centre networks.
• Low, Consistent Latency: Spectrum-4 ASIC delivers deterministic performance.
• Flexible Speed Options: Supports 50/100/200/400GbE breakouts.
• Advanced Congestion Control: Adaptive routing and ECN for stable AI workloads.
• Deep Telemetry: In-band visibility and real-time flow analytics.
• Open Networking: Runs Onyx, Cumulus Linux, and SONiC.
• Redundant Hardware: Hot-swappable PSUs and fans for high availability.
• Optimised Cooling: C2P airflow
• AI & HPC Ready: Built for GPU clusters, NVMe-oF storage, and large-scale training systems.

TECHNICAL SPECIFICATION:

HARDWARE:

PERFORMANCE:

SECURITY:

MANAGEMENT:

PHYSICAL & ENVIRONMENTAL:

ADVANCED FEATURES:

Adaptive Routing for High-Density AI Fabrics:

The SN5400 leverages the Spectrum-4 ASIC’s adaptive routing engine to intelligently balance traffic across multiple paths, ensuring stable throughput even under heavy east-west AI workloads. It continuously analyses congestion levels and automatically selects the optimal path for each flow. This dynamic behaviour improves GPU utilisation and prevents fabric bottlenecks during large-scale training. By distributing traffic intelligently, the switch significantly reduces queue build-up and latency spikes. This ensures that multi-node AI workloads run smoothly even during peak utilisation.

In-Band Telemetry & Deep Fabric Visibility:

Built-in in-band telemetry delivers real-time insights into queue depth, latency variations, microbursts, and traffic spikes directly within the forwarding path. Combined with NVIDIA NEO/UFM, operators gain fabric-wide analytics, historical records, and automated network health alerts. This deep telemetry drastically reduces troubleshooting time for operators managing large fabrics. It also allows predictive maintenance by identifying early signs of congestion or link degradation. These capabilities provide a complete operational picture across complex AI and HPC networks.

EVPN/VXLAN for Scalable Multi-Tenant Fabrics:

The SN5400 supports advanced EVPN and VXLAN overlays, enabling scalable Layer 2 extensions across resilient Layer 3 architectures with efficient MAC/IP learning. This simplifies multi-tenant network designs and allows seamless workload mobility. It enables clean segmentation across customers, applications, and clusters. The design supports smooth expansion of data-centre networks without architectural changes. This makes it ideal for cloud-native workloads and highly distributed virtualised environments.

Lossless Ethernet for NVMe-oF and Storage Fabrics:

With a large 128 MB buffer, precision traffic scheduling, and robust congestion control, the SN5400 provides the low-latency, lossless behaviour required for NVMe-over-Fabrics deployments. It ensures consistent IOPS and predictable latency across distributed storage systems. This is essential for AI training pipelines that rely heavily on high-volume data movement. The switch guarantees stable, high-throughput transfers even during peak replication or rebuild events. As a result, storage clusters deliver smoother and more reliable performance under stress.

Automation-Ready for Modern DevOps Pipelines:

The SN5400 seamlessly integrates with automation ecosystems, including Ansible, Puppet, Chef, SaltStack, and GitOps workflows. REST, gNMI, JSON-RPC, and OpenConfig APIs enable automated provisioning, configuration, and continuous validation. This reduces manual configuration errors and accelerates deployment cycles significantly. Teams can manage hundreds of switches with consistent, policy-driven automation. It also enables CI/CD-style workflows for network infrastructure modernising operations.

High Availability Architecture for Always-On Networks:

Designed for mission-critical environments, the SN5400 features redundant hot-swappable PSUs, N+1 fans, and support for non-disruptive upgrades and rapid failover. It maintains uninterrupted service during maintenance and hardware replacement. This high-availability design minimises the risk of downtime in dense AI and HPC fabrics. Fast convergence capabilities help restore stability quickly after link or node failures. The switch ensures continuous operation even during demanding infrastructure changes.

Thermal-Optimised, Energy-Efficient Design:

Smart thermal algorithms adjust cooling behaviour in real time, reducing energy usage without compromising performance. P2C and C2P airflow configurations support flexible deployment in modern high-density racks. This advanced cooling approach increases long-term hardware reliability in 400G environments. It significantly reduces operational overhead for power and cooling infrastructure. The design ensures stable performance even under sustained heavy workloads.

ORDERING INFORMATION:

WARRANTY & SUPPORT: 

Manufacturers are responsible for warranties, which are based on the purchase date and validity. We make sure the products we sell are delivered on time and in their original condition at Grabnpay. Whether it's physical damage or operational issues, our team will help you find a solution. We help you install, configure, and manage your devices. We'll help you file a warranty claim and guide you every step of the way.

All listed prices reflect standard market rates. Final commercial terms, including volume-based discounts, will be provided based on purchase volume, MOQ, and other applicable criteria. For more information about switches & other accessories, contact our technical support team.