NVIDIA Mellanox MSN3700-VS2R Spectrum-2 200GbE Open Ethernet Switch, 32×QSFP56: This is a 1U fixed-configuration data center Ethernet switch built on the NVIDIA Spectrum-2 ASIC. It exposes 32 QSFP56 ports, each capable of 200GbE per port for a total of 6.4 Tb/s aggregate switching capacity. The "V" SKU prefix denotes the Mellanox Onyx network operating system pre-loaded; this is not a Cumulus Linux SKU. Reverse-airflow chassis with dual hot-swap AC power. This is a refurbished unit, tested by T.E.S IT-SOLUTIONS.
Engineering Context
Spectrum-2 delivers wire-speed L2/L3 forwarding across all 32 ports with a single-pass pipeline, fully shared packet buffer, and zero-touch fairness. Each QSFP56 port can be configured for 200GbE (4×50G PAM4), 100GbE (4×25G NRZ), 50GbE, 40GbE, 25GbE, or 10GbE depending on the optic and breakout cable used. SyncE and PTP/1PPS hardware-based timing distribution supports telco and AI cluster synchronization. Secure boot and signed firmware protect the management plane. The x86 management CPU runs Onyx with full automation, telemetry, and streaming-telemetry hooks for NetOps tooling.
Deployment & Use Cases
Spine and leaf switching in 200GbE Spectrum fabrics. AI/ML training cluster east-west networks alongside ConnectX-6 / ConnectX-6 Dx adapters. NVMe-oF and RoCEv2 storage backbones requiring lossless Ethernet. Hyperscale virtualization fabrics with EVPN/VXLAN overlays. Telecom and 5G transport networks needing PTP-grade timing.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSN3700-VS2R
Switch ASIC: Spectrum-2
Ports: 32 × QSFP56 (200GbE per port)
Aggregate Capacity: 6.4 Tb/s
Operating System: Mellanox Onyx (V variant)
CPU: x86 management processor
Power Supplies: Dual hot-swap AC (1+1 redundant)
Airflow: Reverse — Connector-to-Power (C2P)
Timing: SyncE and PTP / 1PPS
Security: Secure boot, signed firmware
Form Factor: 1U rackmount
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Mellanox QSFP56, QSFP28, and QSFP+ optics, DACs, and AOCs. Operates with ConnectX-5, ConnectX-6, and ConnectX-6 Dx adapters at line rate. The "R" suffix denotes reverse airflow (C2P) — verify your hot-aisle/cold-aisle layout before deployment; not interchangeable with forward-airflow F-suffix units in the same row. The "V" SKU ships with Mellanox Onyx; this is not a Cumulus Linux unit (Cumulus is the C-prefix SKU, MSN3700-CS2R). SONiC may be cross-loaded by qualified operators but is not the factory image. AC-only power input — DC-input chassis is a separate SKU.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies every Spectrum switch end-to-end: full port-to-port load test, PSU redundancy validation, fan tray operation, and Onyx boot sequence. We provide expert consultation on Spectrum fabric design, AI/HPC topology planning, and global shipping. Visit tes-itsolutions.com for the full refurbished switch catalog. Orders ship in 1–3 business days.