NVIDIA Mellanox MIS5025Q-1SFC InfiniScale IV 36-Port QSFP QDR InfiniBand Switch, 1U Unmanaged: This is a 1U rack-mount InfiniBand switch with 36 QSFP ports, built around the InfiniScale IV ASIC. It is an unmanaged Layer-2 InfiniBand switch — there is no on-board subnet manager. This is a refurbished unit.
Engineering Context
The InfiniScale IV switch silicon delivers 2.88 Tb/s of aggregate switching capacity across the 36 QSFP ports, with each port operating at 40 Gb/s QDR (4 lanes x 10 Gb/s). Port-to-port latency is approximately 100 nanoseconds. The unit ships with a single hot-swappable power supply (1+1 redundancy is not provided in this configuration). Airflow is PSU-side to connector-side (front-to-back depending on rack orientation). The switch operates on 100-240 VAC at 50-60 Hz single-phase. Because the switch is unmanaged, an external subnet manager — typically running on a connected ConnectX HCA host (OpenSM) or on a separate managed switch — is required to bring up the InfiniBand fabric.
Deployment & Use Cases
QDR InfiniBand fabric for HPC compute clusters using OpenSM as the subnet manager. Storage interconnect for IBM GPFS/Spectrum Scale and Lustre clusters at QDR rates. Legacy HPC modernization where 40 Gb/s QDR is sufficient and FDR/EDR pricing is unjustified. Test and lab fabrics for InfiniBand training and development.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MIS5025Q-1SFC
ASIC: InfiniScale IV
Ports: 36 x QSFP
Per-Port Data Rate: 40 Gb/s QDR (4 x 10 Gb/s)
Switching Capacity: 2.88 Tb/s
Port-to-Port Latency: ~100 ns
Management: Unmanaged (requires external subnet manager such as OpenSM)
Power Supply: 1 x AC PSU
Airflow: PSU-side to connector-side
Input Voltage: 100-240 VAC, 50-60 Hz, single phase
Form Factor: 1U rack-mountable, standard depth
Compliance: RoHS-5
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with Mellanox ConnectX-2 and ConnectX-3 QDR/FDR HCAs, and with any standards-compliant QSFP QDR cabling — DAC, AOC, or QDR-rated optics. No on-board subnet manager: an OpenSM instance must run on a host or a separate managed switch must be present in the fabric. Single PSU configuration — order a redundant PSU separately for production deployments. QSFP ports operate at QDR (40 Gb/s); they will not auto-negotiate to FDR (56 Gb/s) or EDR (100 Gb/s). Confirm rack airflow direction matches data center hot/cold aisle layout before installing.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies fan operation, PSU output, port link-up across all 36 ports, and firmware revision before shipment. Visit tes-itsolutions.com/quote for HPC fabric design consultation. Global shipping with 1-3 day handling.