NVIDIA Mellanox® MSN4700-WS2RC — Spectrum-3 400GbE Open Ethernet Switch

Technical Identity
The NVIDIA Mellanox® MSN4700-WS2RC is a 1U Ethernet switch built on the Spectrum-3 ASIC, delivering 32 ports of 400GbE in QSFP-DD form factor for a total switching capacity of 12.8 Tb/s and a packet-processing rate up to 8.4 Bpps. The "WS2RC" suffix denotes a standard-depth chassis with NVIDIA Onyx pre-loaded and reverse airflow (C2P — connector-to-power, hot aisle on PSU side). This unit is refurbished Grade A, bench-tested by T.E.S IT-SOLUTIONS.

Specifications

Brand / OEM: NVIDIA Mellanox
Manufacturer Part Number (MPN): MSN4700-WS2RC
Product family: SN4700 / Spectrum-3
ASIC: NVIDIA Spectrum-3
Form factor: 1U rack-mount, 19" standard depth
Ports: 32× QSFP-DD 400GbE
Switching capacity: 12.8 Tb/s (full-duplex, line-rate)
Packet rate: up to 8.4 Bpps
Per-port speeds: 400 / 200 / 100 / 50 / 40 / 25 / 10 GbE (QSFP-DD cages accept QSFP56 / QSFP28 / QSFP+ modules at the respective lower speeds)
Breakout: up to 64× 200GbE, 128× 100GbE, or 128× 50GbE via splitter cables
Protocol: Ethernet only — Spectrum-3 is an Ethernet ASIC and does not support InfiniBand
Operating system: NVIDIA Onyx (MLNX-OS); also runs Cumulus Linux and SONiC via ONIE
Airflow: Reverse (C2P) — intake at port side, exhaust at PSU side
Power supplies: 1+1 hot-swappable AC PSUs
Fans: N+1 hot-swappable
Latency: ~300 ns port-to-port (cut-through)
Buffer: 64 MB fully-shared packet buffer
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS


What This Is NOT

NOT an InfiniBand switch. Spectrum-3 is an Ethernet-only ASIC. For InfiniBand HDR / NDR fabric, see the Quantum-series (MQM8700 HDR, MQM9700 NDR).
NOT an 800GbE switch. Maximum line rate per port is 400GbE. 800GbE designs require Spectrum-4 (SN5600) or Quantum-2 (NDR IB).
NOT a NIC or adapter card. Rack-mount switch — requires 1U rack space, dedicated PDU outlets, and structured cabling.
NOT bundled with optical transceivers, DAC / AOC cables, rail kit, or console cable unless explicitly stated.


Compatibility & Constraints

Compatible host adapters: ConnectX-6 Dx, ConnectX-6, and ConnectX-7 (200 / 400GbE), plus third-party 400GbE NICs compliant with QSFP-DD / IEEE 802.3bs.
Compatible cabling: QSFP-DD 400GbE DAC, AOC, and optical transceivers (e.g., MMA1Z00-NS400 SR8, MMS1Z00-NS400 DR4, MCP1660-W series DAC). QSFP-DD cages are backward-compatible with QSFP56, QSFP28, and QSFP+ modules in non-breakout mode.
Management: Out-of-band 1GbE management port, console (RJ45 + RS232), in-band via any data port. CLI, SSH, SNMP v1/v2c/v3, REST API, Web UI, gNMI streaming telemetry.
Multi-vendor interop: Standard 802.3 Ethernet, BGP, OSPF, EVPN-VXLAN, MLAG, LACP, RoCEv2. Interoperates with Arista, Cisco, Juniper, Dell, and HPE in mixed environments.
Rack space: 1U, 19" rack-mount; verify rail kit (sold separately — e.g., MTEF-KIT-D or MTEF-KIT-E depending on rack depth).
Power: Dual hot-swap AC PSUs; provision 2× C13 outlets per switch.
Airflow direction: C2P (reverse) — verify rack hot / cold-aisle layout before installation.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MSN4700-WS2RC?
The MSN4700-WS2RC is a 1U 32-port 400GbE Open Ethernet switch based on the NVIDIA Spectrum-3 ASIC. It delivers 12.8 Tb/s switching capacity and runs NVIDIA Onyx, Cumulus Linux, or SONiC. The WS2RC suffix indicates a standard-depth chassis with reverse airflow (C2P) and Onyx pre-loaded.
Q. Does the MSN4700-WS2RC support InfiniBand?
No. The SN4700 / Spectrum-3 family is Ethernet-only. For InfiniBand HDR or NDR fabric, use the Quantum-series switches (MQM8700 for HDR, MQM9700 for NDR).
Q. What connector and cabling does it use?
32x QSFP-DD ports. Use QSFP-DD 400GbE DAC, AOC, or optical transceivers. QSFP-DD cages are backward-compatible with QSFP56, QSFP28, and QSFP+ modules at the corresponding lower speeds in non-breakout mode. For breakout, use 2x200G or 4x100G splitter cables.
Q. Which host adapters pair with this switch?
ConnectX-6, ConnectX-6 Dx, and ConnectX-7 for 200 / 400GbE host connectivity. Any standards-compliant 400GbE NIC will interoperate via QSFP-DD / IEEE 802.3bs.
Q. What operating systems run on this switch?
NVIDIA Onyx (MLNX-OS), Cumulus Linux, and SONiC are all supported. The 'W' in WS2RC denotes factory-loaded Onyx; the unit can be re-imaged with Cumulus or SONiC via ONIE.
Q. What is the condition of this unit?
Refurbished Grade A. Bench-tested by T.E.S IT-SOLUTIONS — link verification on all 32 ports, fan and PSU operation, EEPROM / vendor-data check, and full cosmetic inspection.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist serving HPC, AI, and enterprise data-center procurement teams since 2007. We focus on a single brand so every unit is identified by MPN, NVIDIA P/N, ASIC generation, and airflow direction before it ships, and every customer gets free pre-sale compatibility advice for switch, adapter, and cable pairing. Multi-currency B2B invoicing, EU stock with worldwide express options, professional anti-static packaging, and direct technical contact with our engineering team — not a call-center. See tes-itsolutions.com.