NVIDIA Mellanox MSN2700-BS2RO 40GbE 1U Open Ethernet Switch with ONIE: This is a 1U Open Ethernet switch from the MSN2700 family configured for 40GbE-only operation, providing 32 QSFP+ ports in a standard-depth chassis. The "O" suffix denotes factory-loaded ONIE (Open Network Install Environment); the unit ships without a production NOS and is intended for sites that will install Cumulus Linux, NVIDIA Onyx (with separate license) or another ONIE-compatible OS. This is a 40GbE-only Ethernet leaf/aggregation switch, not a 100GbE or InfiniBand platform. Mellanox part number 920-9N101-00R4-0N0. This is a refurbished unit.
Engineering Context
The chassis provides 32 QSFP+ ports at 40GbE line rate with non-blocking forwarding. ONIE provides a hardware-agnostic boot environment that loads any compatible NOS image at first boot or via subsequent re-imaging. The chassis includes 2 hot-swappable AC power supplies for N+1 redundancy and an x86 management CPU. C2P (Connector-to-Power, reverse) airflow draws cool air from the port side toward the power supply side, suitable for hot-aisle deployments where the PSU side faces the hot aisle.
Deployment & Use Cases
40GbE leaf switching for HPC and storage clusters, aggregation switching in mid-density data centers, disaggregated networking deployments where the operator selects the NOS independently from the hardware vendor, lab/test environments needing flexible NOS swapping for validation, and bare-metal cloud infrastructure built on open-networking principles.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSN2700-BS2RO (920-9N101-00R4-0N0)
Port Configuration: 32 × QSFP+
Ethernet Speed per Port: 40GbE
Form Factor: 1U
Chassis Depth: Standard
Airflow: C2P (Reverse, Connector-to-Power)
Power Supplies: 2 × AC, hot-swappable
Management CPU: x86
Pre-loaded OS: ONIE (no production NOS included)
Protocol: Ethernet only (40GbE)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Mellanox QSFP+ optics and DAC/AOC cables (MC2210130 40GbE DAC, MC2210411 40GbE SR4, MC6709309 40GbE AOC) and third-party QSFP+-compliant 40GbE optics. ONIE-loaded units do NOT include a Cumulus, Onyx, or SONiC license; OS licensing must be procured separately. Not configured for 100GbE — this is a 40GbE-only platform. Not a VPI/InfiniBand switch. Rail kit is NOT included and must be ordered separately. C2P airflow is fixed and not field-reversible.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS performs ONIE boot validation, port-by-port link testing, and PSU/fan diagnostics on every refurbished MSN2700 switch. Browse our full Mellanox Ethernet catalog at https://www.tes-itsolutions.com. Standard handling time is 1–3 business days.