NVIDIA Mellanox MSX6025F-1SRR SwitchX-2 FDR 56Gb/s InfiniBand Switch (1U, C2P Airflow): This is a 36-port externally-managed FDR InfiniBand switch in a 1U chassis with QSFP+ connectors. The MSX6025F-1SRR runs the SwitchX-2 ASIC at FDR (56 Gb/s per port) and ships with a single AC power supply and connector-to-power (C2P) reversed airflow. This is an externally-managed switch — subnet management must be provided by an external host running OpenSM, or by a managed switch elsewhere in the fabric. This is a refurbished unit.
Engineering Context
Built on the SwitchX-2 silicon, the MSX6025 family delivers 4.032 Tb/s aggregate non-blocking bandwidth across 36 QSFP+ ports at 56 Gb/s FDR. Port-to-port latency is approximately 170 nanoseconds, suitable for tightly-coupled HPC clusters. The platform supports VPI (Virtual Protocol Interconnect) hardware paths, but in this externally-managed SKU the IB subnet must be provided by OpenSM on a fabric host. Standard depth chassis fits 19-inch racks. C2P airflow draws air from the QSFP+ port side and exhausts at the power supply side.
Deployment & Use Cases
Edge or leaf switch in HPC clusters running MPI workloads such as OpenFOAM, GROMACS, NAMD, or LS-DYNA. GPU-Direct RDMA fabrics for machine learning training jobs. Storage cluster interconnect for Lustre, GPFS, and BeeGFS deployments. Lab and burn-in environments where airflow direction must match adjacent rack equipment to maintain a hot-aisle/cold-aisle layout.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSX6025F-1SRR
Product Family: SwitchX-2 SX6025
Form Factor: 1U Rack-mountable, Standard Depth
Ports: 36x QSFP+
Port Speed: FDR 56 Gb/s per port
Switching Capacity: 4.032 Tb/s aggregate non-blocking
Latency: ~170 ns port-to-port
Management: Externally managed (no internal subnet manager)
Power Supply: 1x AC PSU (non-redundant)
Airflow: C2P (Connector-to-Power, reversed)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Mellanox ConnectX-3, ConnectX-3 Pro, ConnectX-4, and ConnectX-5 VPI HCAs. Works with FDR-rated QSFP+ copper DAC and active optical cables. Requires an external subnet manager — typically OpenSM running on a Linux host or another managed switch in the fabric — this unit cannot self-manage the IB subnet. Single PSU configuration provides no power redundancy; deploy only where a UPS or alternate power feed is acceptable. Airflow is C2P (reversed) — verify it matches the rack thermal layout before installation. Not suitable as an Ethernet switch unless the connected ConnectX adapters are placed in Ethernet VPI mode, and even then routing/ETH gateway features are limited.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS bench-tests every refurbished Mellanox switch — port link integrity, PSU output, and management interface — before shipment. Visit tes-itsolutions.com for a quote. EU-based with global shipping and 1–3 day handling.