NVIDIA Mellanox MSB7790-EB2F Switch-IB EDR InfiniBand 36-Port 1U Switch: This is a short-depth 1U rackmount InfiniBand switch with 36 QSFP28 ports at 100Gb/s per port, built on the original Switch-IB ASIC. The unit ships with dual AC power supplies, P2C (front-to-back) airflow, and a rail kit. This is the externally managed short-depth variant, not a managed appliance running an embedded Subnet Manager. This is a refurbished unit.
Engineering Context
The MSB7790-EB2F is built on the first-generation Switch-IB silicon and supports adaptive routing, congestion control, and 36 EDR ports at 100Gb/s for an aggregate 7.2Tb/s. The short-depth chassis is well suited to telecom, edge, and shallow-rack deployments where a standard-depth switch will not fit. P2C airflow is the front-to-back direction. SHArP collective offload is a Switch-IB 2 feature and is not present on this generation.
Deployment & Use Cases
EDR top-of-rack aggregation in shallow telco or edge cabinets. HPC clusters running CFD, weather, or molecular dynamics where SHArP is not required. Storage fabrics for Lustre, GPFS, or BeeGFS. Sites that already operate OpenSM or UFM externally and want to add a non-managed leaf with minimal rack depth.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSB7790-EB2F
Form Factor: 1U rackmount, short depth
Switch ASIC: Switch-IB (first generation)
Ports: 36 x QSFP28
Per-Port Rate: 100Gb/s EDR InfiniBand
Aggregate Bandwidth: 7.2Tb/s
Management: Externally managed (host-based Subnet Manager)
Power: 2 x AC power supplies (redundant)
Airflow: P2C (front-to-back)
Included: Rail kit
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with ConnectX-4 and ConnectX-5 EDR adapters and with Mellanox EDR DAC, AOC, and transceiver-based optical cabling. Externally managed: requires OpenSM or UFM on an attached host; does not run an embedded SM. The Switch-IB ASIC does not provide SHArP — choose a Switch-IB 2 SKU (MSB7800 family) if SHArP is required. P2C airflow is fixed and not reversible. AC power only on this SKU.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS bench-tests every switch for full port link-up, dual-PSU redundancy, fan operation, and external SM enumeration before shipment. Handling time is 1-3 business days with global shipping and warranty.