NVIDIA Mellanox® MSN4700-WS2RO — Spectrum-3 400GbE 1U Managed Switch

Technical Identity
The NVIDIA Mellanox® MSN4700-WS2RO is a 1U managed Ethernet switch built on the NVIDIA Spectrum-3 ASIC. It exposes 32 × QSFP-DD ports at 400GbE line rate for a non-blocking 12.8 Tb/s switching capacity. Spectrum-3 is an Ethernet-only platform — it does not run InfiniBand. This refurbished unit is bench-tested Grade A by T.E.S IT-SOLUTIONS in Germany.

Specifications

OEM: NVIDIA (Mellanox)
Part Number (MPN): MSN4700-WS2RO
ASIC / Silicon: NVIDIA Spectrum-3
Form Factor: 1U rack-mount, 19"
Port Configuration: 32 × QSFP-DD
Native Port Speed: 400GbE per port
Switching Capacity: 12.8 Tb/s, non-blocking
Packet Rate: Up to 8.4 Bpps
Protocol: Ethernet only (no InfiniBand)
Breakout Support: 2 × 200GbE, 4 × 100GbE, 8 × 50/25/10GbE per port via DAC/AOC splitters or breakout transceivers
Operating System: NVIDIA Cumulus Linux, NVIDIA Onyx / MLNX-OS, or community SONiC
Airflow: Connector-to-Power (C2P) — verify direction against rack cold-aisle layout before install
Power Supplies: Dual redundant hot-swap PSUs
Fans: N+1 redundant hot-swap fan modules
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS (link establishment, port-by-port traffic validation, cosmetic inspection)


What This Is NOT

NOT an InfiniBand switch. Spectrum-3 is Ethernet-only silicon. For NDR or HDR InfiniBand fabric, use the Quantum-2 (MQM9700) or Quantum (MQM8700) family.
NOT a Spectrum-4 800GbE switch. Maximum port speed is 400GbE per port. 800GbE requires the MSN5600 / MSN5400 (Spectrum-4) line.
NOT a QSFP56 or QSFP28 switch. The physical cage is QSFP-DD (8-lane). QSFP56 (4-lane, 200GbE) and QSFP28 (4-lane, 100GbE) transceivers operate at their own rated speed; the cage will not negotiate above QSFP-DD rates.
NOT bundled with transceivers, DAC/AOC cables, rail kit, or PSU power cords unless explicitly listed in this listing.
NOT a NIC or adapter card. Top-of-Rack or End-of-Row switch — requires 1U of rack space and AC power.


Compatibility

Host Adapters: Pairs with NVIDIA ConnectX-6 Dx, ConnectX-6 Lx, ConnectX-7, and BlueField-2 / BlueField-3 DPUs running Ethernet at 10/25/40/50/100/200/400 GbE.
Cabling — DAC: QSFP-DD-to-QSFP-DD passive copper for 400GbE, plus 400G-to-2×200G and 400G-to-4×100G breakout DAC splitters for top-of-rack fan-out.
Cabling — AOC: QSFP-DD active optical cables in straight or breakout configurations for inter-rack reach up to 30 m.
Optical Transceivers: 400G-DR4, 400G-FR4, 400G-LR4, 400G-DR4+, and 2 × 200G-FR4 via breakout. MSA-compliant third-party optics are supported.
Switch Operating Systems: NVIDIA Cumulus Linux 4.4 or later, NVIDIA Onyx / MLNX-OS, and community SONiC.
Management Interfaces: Console (RJ-45 / mini-USB), out-of-band 1GbE management port, SNMP v1/v2c/v3, REST API, JSON RPC, Web UI, Ansible automation, and NVIDIA NetQ telemetry export.
Power: Dual hot-swap AC PSUs — verify input voltage and connector against rack PDU.
Rack: Standard 19" two-post or four-post rack; rail kit (MTEF-KIT-D) sold separately.


FAQ
Q: What is the NVIDIA Mellanox MSN4700-WS2RO?

A: A 1U managed Ethernet switch based on the NVIDIA Spectrum-3 ASIC. It provides 32 × QSFP-DD ports at 400GbE for a non-blocking 12.8 Tb/s switching capacity, with breakout to 2 × 200GbE or 4 × 100GbE per port.

Q: Does the MSN4700-WS2RO support InfiniBand?

A: No. Spectrum-3 is an Ethernet-only ASIC. For InfiniBand fabric, use the Quantum-2 (MQM9700, NDR 400Gb/s) or Quantum (MQM8700, HDR 200Gb/s) family instead.

Q: Which network operating systems run on this switch?

A: NVIDIA Cumulus Linux, NVIDIA Onyx / MLNX-OS, and community SONiC. Management is available via console, out-of-band 1GbE, SNMP, REST API, JSON RPC, Web UI, and NetQ telemetry.

Q: Are third-party DAC cables and transceivers supported?

A: Yes. The QSFP-DD cages are MSA-compliant; NVIDIA-branded LinkX is recommended for full coding-violation telemetry, but third-party 400G DAC, AOC, and optical transceivers from MSA-compliant vendors will operate normally.

Q: What is the condition of this unit?

A: Refurbished Grade A. Each unit is bench-tested by T.E.S IT-SOLUTIONS for link establishment, port-by-port traffic validation, fan and PSU health, and full cosmetic inspection. Anti-static packaging and global B2B shipping from EU stock.

Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a German B2B specialist in NVIDIA Mellanox data-center networking — Spectrum and Quantum switches, ConnectX and BlueField adapters, LinkX optics. Every refurbished unit is bench-tested for link, signal integrity, fan, and PSU health, shipped in professional anti-static packaging from EU stock, and backed by technical consultation for HPC, AI cluster, and high-throughput storage fabric deployments.