NVIDIA Mellanox® MSN2700-CB2FO — Spectrum 100GbE Managed Ethernet Switch (32-Port QSFP28, ONIE)
Technical Identity
The NVIDIA Mellanox® MSN2700-CB2FO (Mellanox SN2700 family) is a 1U managed Ethernet-only top-of-rack switch built on the Spectrum-1 ASIC. It exposes 32× 100GbE QSFP28 line-rate ports with a non-blocking 6.4 Tb/s switching capacity and predictable sub-300 ns port-to-port latency. The SKU code resolves to: Spectrum-1, 32-port chassis, front-to-rear (P2C, power-side intake) airflow, and ONIE boot environment for open-NOS installation (NVIDIA Onyx / MLNX-OS, Cumulus Linux, SONiC, Dent). This unit is refurbished — Grade A, bench-tested and verified by T.E.S IT-SOLUTIONS prior to shipping.
Specifications
Brand: NVIDIA Mellanox
MPN: MSN2700-CB2FO
Product family: Mellanox SN2700 / Spectrum-1
Form factor: 1U rack-mount, 19"
Ports: 32× QSFP28 (100GbE native)
Port speeds supported: 100GbE per port; configurable as 2× 50GbE or 4× 25GbE per port via breakout (requires breakout cables, sold separately)
Protocol: Ethernet only — this SKU does NOT support InfiniBand
Switching capacity: 6.4 Tb/s, full duplex, non-blocking
Packet rate: up to 4.76 Bpps
Latency: < 300 ns port-to-port (cut-through)
ASIC: Mellanox Spectrum-1
Boot environment: ONIE (Open Network Install Environment)
Supported NOS: NVIDIA Onyx / MLNX-OS, Cumulus Linux, SONiC, Dent
Airflow: F = front-to-rear (power-side intake / P2C)
Power supplies: Dual hot-swap, 1+1 redundant
Fans: Hot-swap, N+1 redundant
Management: Out-of-band 1GbE RJ45, RS232 console, USB
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS
What This Is NOT
NOT an InfiniBand switch. Spectrum-1 ASIC is Ethernet-only. For HDR/NDR InfiniBand fabrics use a Quantum / Quantum-2 switch (MQM8700 / MQM9700).
NOT a 200/400GbE switch. Port speed tops out at 100GbE QSFP28. For 200GbE see SN3700 (Spectrum-2); for 400GbE see SN4700 (Spectrum-3).
NOT a Spectrum-2/3/4 platform. This is the original Spectrum-1 ASIC.
NOT bundled with optical transceivers, DAC/AOC cables, breakout cables, rail kit, or power cords unless explicitly stated on the line item.
NOT a desktop / fanless device. Active cooling is loud; intended for a data-center rack.
Compatibility & Constraints
Compatible host adapters (pairs-with): NVIDIA Mellanox ConnectX-4, ConnectX-4 Lx, ConnectX-5, ConnectX-5 Ex, ConnectX-6 (in Ethernet mode), ConnectX-6 Dx, ConnectX-7 (down-speed to 100GbE).
Compatible cables (pairs-with): 100GbE QSFP28 DAC (MCP1600 series), 100GbE QSFP28 AOC (MFA1A00 series), QSFP28-to-4×SFP28 breakout DAC/AOC for 4× 25GbE, QSFP28 SR4/LR4/ER4 optical transceivers.
Airflow direction must match rack airflow scheme (this SKU = P2C / front-intake). Mixing with rear-intake gear in the same hot-aisle creates thermal imbalance.
NOS install: ONIE accepts NVIDIA Onyx / MLNX-OS, Cumulus Linux, SONiC, or Dent. Verify license and support model before deployment.
Rack mount: standard 19" 1U slot; rail kit sold separately.
Frequently Asked Questions (FAQ)
Q. What exactly is the NVIDIA Mellanox MSN2700-CB2FO?
It is a Mellanox SN2700 / Spectrum-1 managed Ethernet switch — 1U, 32× 100GbE QSFP28 ports, ONIE boot environment, P2C (front-to-rear) airflow, dual hot-swap PSUs.
Q. Does the MSN2700-CB2FO support InfiniBand?
No. The Spectrum-1 ASIC is Ethernet-only. For InfiniBand use a Quantum-family switch such as MSB7800 (EDR) or MQM8700 (HDR).
Q. Can each 100GbE port be broken out into 4× 25GbE?
Yes — every QSFP28 port can be configured as 4× 25GbE or 2× 50GbE using a QSFP28-to-SFP28 breakout cable, giving up to 128× 25GbE total. Breakout cables are sold separately.
Q. What does the "CB2FO" suffix mean?
CB = Spectrum-1 / SN2700 SKU code, 2 = 32-port chassis, F = front-to-rear (P2C) airflow, O = ONIE boot environment (open NOS install).
Q. Which network operating systems run on this switch?
Because it ships with ONIE, you can install NVIDIA Onyx (formerly MLNX-OS), Cumulus Linux, SONiC, or Dent.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Every unit is bench-tested by T.E.S IT-SOLUTIONS: PSU and fan verification, full port link-up test on QSFP28 loopback, EEPROM and serial-number check, and cosmetic inspection. Ships from EU stock in anti-static packaging with global B2B express options.
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, and direct technical contact with our engineering team — not a call-center.