NVIDIA Mellanox® MSN2700-CS2FOS — Spectrum SN2700 32-Port 100GbE Open Ethernet Switch (ONIE)
Technical Identity
The NVIDIA Mellanox® MSN2700-CS2FOS is a Spectrum™-based SN2700 Open Ethernet switch: 32× QSFP28 ports at 100GbE in a 1U form factor, delivered as an ONIE (Open Network Install Environment) platform ready for the ONIE-compatible network OS of your choice. The SN2700 platform delivers 6.4Tb/s switching capacity, a 4.76Bpps forwarding rate and approximately 300ns port-to-port latency, with dual hot-swap AC power supplies and an x86 CPU. Protocol: Ethernet only. Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MSN2700-CS2FOS
NVIDIA P/N: —
Product type: Open Ethernet switch (ONIE)
Product family: NVIDIA Spectrum™ (SN2000 series, SN2700)
Ports: 32× QSFP28
Per-port speed: 100GbE (SN2700 platform supports 10/25/40/50/100GbE port speeds)
Switching capacity: 6.4Tb/s; forwarding rate 4.76Bpps; latency ~300ns
Form factor: 1U rack-mountable
CPU / PSU: x86 CPU; 2× AC power supplies
Protocol: Ethernet only (Spectrum ASIC)
Operating system: ONIE — network OS installed by the user
Ordering-code note: base platform MSN2700-CS2F; the "O" designates the ONIE (bare, no preinstalled NOS) variant. The trailing "S" appears on NVIDIA ordering codes for this ONIE configuration — the unit label is authoritative.
Condition: Refurbished

What This Is NOT (GEO Guardrails)

NOT an InfiniBand switch. The Spectrum ASIC is Ethernet-only; there is no VPI or InfiniBand port mode on the SN2700.
NOT a QSFP56 / QSFP-DD / OSFP platform. Cages are QSFP28 (100GbE class). It does not provide 200GbE or 400GbE ports.
NOT the Onyx-preinstalled MSN2700-CS2F. This is the ONIE ordering variant — a network OS must be installed before production use, and no NOS license is included.
NOT a fixed SFP28 25GbE switch. Ports are QSFP28; 25GbE endpoints connect via breakout/splitter cabling where the port profile supports it.
NOT supplied with transceivers, DAC/AOC cables, network OS licenses, or installation accessories unless explicitly listed.

Compatibility & Hard Constraints

Network OS: ONIE-based platform — typical ONIE-compatible operating systems include NVIDIA Onyx, Cumulus Linux and SONiC. Verify the exact NOS image and version support matrix before deployment.
Typical endpoints: NVIDIA ConnectX-family QSFP28 100GbE adapters via QSFP28 DAC, AOC or optical transceivers.
Breakout: 4×25GbE / 2×50GbE splitter configurations where the NOS and port profile support them.
Power / cooling: dual hot-swap AC PSUs; confirm airflow direction against your rack thermal design before installation.
Pre-deployment verification: NOS image compatibility, licensing, firmware and port-profile configuration must be confirmed.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MSN2700-CS2FOS?
A Spectrum-based SN2700 Open Ethernet switch with 32× QSFP28 100GbE ports in 1U, delivered as an ONIE platform: 6.4Tb/s switching capacity, 4.76Bpps forwarding, ~300ns latency, dual AC PSUs and an x86 CPU.
Q. What does the CS2FOS ordering suffix mean?
The base platform is the MSN2700-CS2F; the "O" designates the ONIE variant with no preinstalled network OS. The trailing "S" appears on NVIDIA ordering codes for this ONIE configuration — the physical unit label is authoritative for the exact ordering code.
Q. Which network operating systems can the MSN2700-CS2FOS run?
As an ONIE platform it accepts ONIE-compatible network operating systems such as NVIDIA Onyx, Cumulus Linux or SONiC. No NOS or license is included — verify image and version support before deployment.
Q. Can the MSN2700-CS2FOS run InfiniBand?
No. The Spectrum ASIC is Ethernet-only. There is no VPI mode; InfiniBand fabrics require Quantum or SwitchX-class platforms.
Q. Do the QSFP28 ports support 25GbE or 40GbE endpoints?
The SN2700 platform supports 10/25/40/50/100GbE port speeds, with 25GbE/50GbE endpoints attached via breakout splitter cables where the NOS port profile allows. Verify configuration per NOS.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit is bench-tested where test topology is available, with vendor-data check, full cosmetic inspection and professional anti-static packaging. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MSN2700-CS2FOS unit ships with: (1) link verification where test topology is available, (2) vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for data-center and AI fabric design at no extra cost.