NVIDIA Mellanox SN4600C, 64 × 100GbE QSFP28 Open Networking Switch, Redundant Power, Hot-Swappable Fans, 2RU (REF)

NVIDIA Mellanox SN4600C (Refurbished) is a high-density, 2U Ethernet switch purpose-built for next-generation data centres, cloud infrastructures, and AI clusters. Equipped with 64 × 200GbE QSFP56 ports, it delivers an aggregate throughput of up to 6.4 Tb/s with ultra-low latency, making it an ideal choice for spine, leaf, and hyper-scale network architectures.

Powered by the advanced NVIDIA Spectrum-3 ASIC, the SN4600C supports a flexible range of port speeds from 1 GbE to 200 GbE, enabling seamless scalability and superior performance efficiency across diverse workloads. This open Ethernet platform offers complete programmability, hardware-based telemetry, and support for Cumulus Linux, NVIDIA Onyx, and SONiC, ensuring interoperability and agility in disaggregated and software-defined networking environments.

KEY FEATURES:

• Port Configuration: 64 × QSFP56 ports supporting up to 100GbE per port.
• Switching Capacity: 6.4 Tbps non-blocking throughput.
• Forwarding Rate: 8.4 Bpps for high-performance packet forwarding.
• ASIC Architecture: NVIDIA Spectrum-3 for consistent line-rate performance. 
• Supported Speeds: 1/10/25/40/50/100 GbE with flexible breakout options.
• Latency: Ultra-low sub-microsecond latency for AI and HPC workloads.
• Buffer Size: 64 MB shared packet buffer for congestion management.
• Redundancy: Dual hot-swappable AC/DC PSUs and N+1 fan redundancy.
• Chassis Form Factor: 2RU rack-mountable metal enclosure.
• VLAN Support: Up to 4,000 VLANs for segmented traffic control.
• Layer 3 Capabilities: BGP, OSPF, VRF-Lite, and static routing support.
• QoS: Hardware-based QoS with advanced traffic prioritisation.
• Telemetry & Monitoring: Streaming telemetry, sFlow, and real-time diagnostics.
• Automation: Supports REST APIs, Ansible, and Zero Touch Provisioning (ZTP).
• Network OS Compatibility: Open Networking ready - supports Onyx, SONiC, and Cumulus Linux.
• Cooling: Hot-swappable variable-speed fans with front-to-back or back-to-front airflow.
• Use Case: Ideal for AI, ML, Cloud, and Data Centre spine-leaf topologies.

TECHNICAL SPECIFICATION: 

HARDWARE:

PERFORMANCE:

SECURITY:

MANAGEMENT:

PHYSICAL & ENVIRONMENTAL:

ADVANCED FEATURES:

High-Performance, Non-Blocking Switching Fabric:

The SN4600C features a 6.4 Tbps non-blocking switching architecture and 8.4  Bpps forwarding rate, ensuring simultaneous wire-speed Layer 2 and Layer 3 traffic across all 64 QSFP56 ports. Its ultra-low latency (<1 µs) is ideal for high-performance computing, AI/ML workloads, cloud networking, virtualization, and storage replication. The 1,000,000 MAC address table and deep packet buffers allow seamless handling of broadcast storms, traffic bursts, and latency-sensitive applications. Advanced buffer management ensures packet loss is minimized during peak loads, providing consistent performance for critical enterprise applications. Its architecture is optimized for high-density deployments, enabling large-scale network fabrics without performance bottlenecks.

Advanced Layer 3 Routing & Network Segmentation:

Supports BGP, OSPF, VRF-Lite, and static routing, providing flexible network segmentation and secure inter-VLAN routing for multi-tenant or enterprise environments. Up to 4,000 VLANs are supported, enabling large-scale deployments without performance degradation. Traffic is optimally distributed across complex topologies, ensuring predictable latency and high availability for critical applications. Dynamic route convergence and policy-based routing enhance network efficiency in evolving environments. Full IPv4 and IPv6 support allows seamless migration and interoperability across hybrid networks.

Stacking and Multi-Chassis Link Aggregation (MLAG):

MLAG provides active-active redundancy across multiple chassis, delivering automatic failover and load balancing. Enables horizontal scalability by allowing multiple switches to operate as a single logical unit. Stacking functionality, with high-bandwidth interconnects, ensures simplified centralized management, uninterrupted traffic flow, and elimination of single points of failure in enterprise and HPC environments. Aggregate bandwidth across stacked switches ensures high-performance traffic forwarding. Redundant stacking links protect against interconnect failures, maintaining network stability during upgrades or maintenance.

Open Networking Flexibility (ONIE-Compatible):

Supports NVIDIA Onyx, SONiC, and Cumulus Linux, allowing deployment of open networking solutions and software-defined network (SDN) architectures. ONIE compatibility provides vendor-agnostic freedom, future-proofing, and integration with orchestration tools. This enables custom network operating system deployment, automation, and advanced telemetry for cloud, AI, and data centre networks. Operators can adopt preferred NOS environments without being locked to a single vendor. Open networking also simplifies integration with network monitoring and analytics platforms for proactive management.

Energy Efficiency & Fresh-Air Compliance:

IEEE 802.3az Energy Efficient Ethernet (EEE) reduces idle power consumption and overall operational costs. The fresh-air compliant design allows deployment in office wiring closets, distributed campuses, or standard data centre environments without requiring specialized HVAC systems. Optimized power usage ensures energy savings without sacrificing performance under full load. Variable-speed fans adjust automatically to traffic and temperature conditions, lowering operational noise. Efficient design reduces carbon footprint, making the SN4600C environmentally friendly while supporting high-performance workloads.

Redundant, Serviceable Hardware:

Dual 550 W AC/DC hot-swappable power supplies and N+1 redundant variable-speed fans ensure continuous operation. Hot-swappable components can be serviced or replaced without disrupting network operations. Front-to-back and back-to-front airflow support provides flexibility for diverse rack layouts and high-density installations. Redundant PSUs automatically balance load and maintain uptime in case of failure. Components are easily accessible, reducing maintenance time and simplifying data centre management.

Comprehensive Security & Threat Protection:

Includes multi-layered security features such as ACLs, RBAC, MAC-based authentication, 802.1X, DHCP snooping, Dynamic ARP Inspection (DAI), and IP Source Guard. Protects against unauthorized access, spoofing, man-in-the-middle attacks, and other network threats. Suitable for enterprise, multi-tenant, and cloud environments requiring strict security compliance. Security policies can be centrally managed and monitored across multiple switches. Real-time threat detection and logging enhance incident response and regulatory compliance.

Advanced QoS & Traffic Management:

Eight hardware queues per port, Weighted Round-Robin (WRR), and strict priority queuing enable prioritization of latency-sensitive traffic such as voice, video, and mission-critical applications. Traffic shaping, rate limiting, and deep packet inspection ensure consistent network performance under high-load or congested conditions. QoS policies can be customized per port or per VLAN, providing granular control. Latency-sensitive applications maintain optimal performance even in peak traffic conditions. Ensures predictable bandwidth allocation for multi-tenant or multi-service networks.

Automation, Monitoring & Analytics:

Supports REST APIs, Zero-Touch Provisioning (ZTP), Ansible, sFlow, RMON, and streaming telemetry for automated monitoring and analytics. Administrators can automate provisioning, monitor network health, detect congestion, generate detailed performance reports, and troubleshoot issues proactively. Integration with orchestration platforms enables rapid deployment and simplified operations. Telemetry data can be analyzed for capacity planning and predictive maintenance. Reduces manual configuration errors and enhances overall network reliability.

Scalability & Future-Proof Architecture:

Designed for enterprise, HPC, AI, and cloud environments, the SN4600C supports MLAG, large VLANs, open NOS, and advanced telemetry. Network expansion can be performed without redesign, supporting growth in dense data centres, campus networks, or multi-tenant infrastructures. Ensures long-term viability and predictable performance in dynamic networking environments. Supports evolving workloads and hybrid cloud deployments. Enables seamless integration with new network technologies as they emerge.

Enhanced Deployment Flexibility:

2RU form factor with dual airflow options, hot-swappable components, and fresh-air compliance enables deployment in dense racks, branch offices, or distributed campus networks. Flexible stacking and high-density QSFP56 ports allow easy expansion. Refurbished units are fully tested to enterprise standards, delivering reliability and performance comparable to new hardware. Supports various rack types and orientations for space optimization. Simplifies deployment in mixed vendor environments and heterogeneous network architectures.

High Availability & Redundancy Features:

Supports multi-chassis interconnects, redundant PSUs, and N+1 fan redundancy to maximize uptime. Active-active MLAG and high-speed interconnects ensure seamless traffic continuity during maintenance or component failures. High availability features protect mission-critical applications from downtime. Failover processes are automated to maintain consistent network services. Redundancy ensures uninterrupted operations in enterprise and cloud deployments.

Optimized for AI, HPC, and Cloud Workloads:

Low-latency, high-throughput design supports modern workloads including AI training/inference, virtualization clusters, cloud services, and HPC storage fabrics. Deep buffers and high port density provide scalable connectivity for compute-heavy deployments. Designed to minimize congestion and packet loss under peak traffic. Supports high-speed interconnects for GPU clusters and AI/ML frameworks. Ensures performance consistency for latency-sensitive and data-intensive applications.

 ORDERING INFORMATION:

SUPPORT:

All refurbished products sold on Grabnpay are tested, verified, and delivered in good working condition. Our team provides assistance with installation, configuration, and troubleshooting to ensure smooth operations. Please note that for refurbished products, no manufacturer warranty, vendor support, or license coverage applies. For any issues, our technical support team will guide you with solutions and recommend suitable replacements or upgrades if required.