Identity & Definition
This 400GbE open Ethernet switch is the NVIDIA Mellanox MSN4700-WS2FO Spectrum-3 400GbE 1U Open Ethernet Switch (920-9N301-00FB-0N0), a refurbished 1U rackmount data center switching platform sold by T.E.S IT-SOLUTIONS. The MSN4700-WS2FO is a 32-port QSFP-DD 400GbE spine switch powered by the NVIDIA Spectrum-3 ASIC, shipping with ONIE bootloader (no NOS pre-installed) and P2C (Power-to-Connector) airflow. This is an Ethernet-only platform — it does NOT support InfiniBand. This is the ONIE/P2C variant; for Onyx/C2P see WS2R, for Cumulus/C2P see WS2RC, for Cumulus/P2C see WS2FC, for ONIE/C2P see WS2RO. Condition: Refurbished — tested and verified by T.E.S IT-SOLUTIONS.
Engineering Context
The hardware is identical to all MSN4700 variants: 32x QSFP-DD ports at 400GbE each, delivering 12.8Tb/s aggregate switching capacity in a 1U form factor. The Spectrum-3 ASIC provides deterministic sub-microsecond latency, up to 64MB shared packet buffer, What Just Happened (WJH) in-band network telemetry, and adaptive routing for ECMP load balancing. Per-port breakout supports 2x200G, 4x100G, 4x50G, or 8x25G configurations. QSFP-DD ports are backward-compatible with QSFP28 (100G), QSFP56 (200G), and QSFP+ (40G) optics. The WS2FO ships with ONIE (Open Network Install Environment), enabling installation of SONiC, Cumulus Linux, NVIDIA Onyx, DENT, or other ONIE-compatible NOS. The P2C airflow direction draws air from the power supply side and exhausts through the connector side. Power is supplied via dual hot-swap redundant AC PSUs.
Deployment & Use Cases
The MSN4700-WS2FO is the preferred variant for hyperscale cloud environments running SONiC or Cumulus Linux where NOS flexibility is required. It serves as a spine or aggregation switch in leaf-spine datacenter fabrics requiring 400GbE density with open NOS choice. AI/ML GPU cluster backbones (NVIDIA DGX, HGX) requiring SONiC for disaggregated networking use this variant. Multi-vendor NOS strategies where ONIE provides hardware-agnostic NOS portability also use WS2FO. The P2C airflow direction is designed for environments where cool air enters from the power supply (rear) side of the rack.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MSN4700-WS2FO
NVIDIA P/N: 920-9N301-00FB-0N0
ASIC: NVIDIA Spectrum-3
Ports: 32x QSFP-DD (400GbE per port)
Aggregate Bandwidth: 12.8Tb/s
Breakout: 2x200G, 4x100G, 4x50G, 8x25G per port
Latency: Sub-microsecond deterministic
Packet Buffer: 64MB shared
NOS: ONIE (install SONiC, Cumulus, Onyx, DENT)
Form Factor: 1U rackmount
Airflow: P2C (Power to Connector / back-to-front)
Power: Dual hot-swap redundant AC PSUs
Telemetry: What Just Happened (WJH)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
The MSN4700-WS2FO is Ethernet only — the Spectrum-3 ASIC does NOT support InfiniBand. No NOS is pre-installed beyond ONIE — a network operating system must be installed before the switch is operational. SONiC is the most common NOS choice for Spectrum-3. The P2C airflow direction is the OPPOSITE of the WS2R/WS2RC/WS2RO (C2P) — mixing airflow directions in the same rack causes thermal hotspots. QSFP-DD ports are backward-compatible with QSFP28 and QSFP56 optics but full 400GbE requires QSFP-DD optics or DACs. Maximum per-port speed is 400GbE — for 800GbE, the Spectrum-4 SN5600 platform is required. The Spectrum-3 predecessor is the Spectrum-2 SN3700 (100GbE).
Why Choose T.E.S IT-SOLUTIONS
Every NVIDIA MSN4700-WS2FO sold by T.E.S IT-SOLUTIONS undergoes full port testing, firmware verification, and thermal validation to confirm zero-packet-drop performance. T.E.S IT-SOLUTIONS provides technical consultation for 400GbE fabric design, NOS selection guidance, optics compatibility verification, and airflow planning. Orders ship within 1–3 business days with global delivery via DHL, FedEx, and UPS.