NVIDIA Mellanox MSB7790-ES2F Switch-IB EDR InfiniBand Switch — 36 QSFP28 Ports, 100Gb/s per Port, 1U, Dual PSU, P2C Airflow: This is an externally-managed (no onboard subnet manager) 36-port Switch-IB EDR InfiniBand switch with QSFP28 cages, in a 1U rack form factor. The "ES2F" suffix designates dual AC power supplies and PSU-side to connector-side (P2C / front-to-back) airflow. This is NOT a Switch-IB-2 / HDR platform (those are MSB7800 / MQM87xx series) and NOT a managed switch with onboard SM — it is Switch-IB EDR (100Gb/s per port). Condition: Refurbished, tested.
Engineering Context: The MSB7790-ES2F is built on the Switch-IB ASIC and provides 7.2Tb/s aggregate non-blocking switching capacity across 36 EDR ports, each operating at 100Gb/s (4x25Gb/s NRZ). Port-to-port latency is on the order of 90ns. As an externally-managed switch, fabric subnet management must be supplied by an external OpenSM instance running on a host or by a managed peer.
Deployment & Use Cases: Used as a top-of-rack or director-class spine in EDR InfiniBand HPC clusters, GPU-accelerated AI/ML training fabrics (NCCL collectives over IB), low-latency financial back-end networks, and NVMe-oF over InfiniBand storage interconnects.
Technical Specifications:
- Switch ASIC: Switch-IB
- Port Count: 36 x QSFP28
- Per-Port Rate: EDR InfiniBand 100Gb/s (4x25Gb/s NRZ)
- Switching Capacity: 7.2 Tb/s aggregate, non-blocking
- Port-to-Port Latency: ~90 ns
- Management: Externally-managed (external OpenSM required)
- Form Factor: 1U rack-mount
- Power Supply: Dual hot-swap AC PSUs
- Airflow: PSU-side to connector-side (P2C, front-to-back)
- NVIDIA P/N family: 920-9B010-00FE-0D1
- Backward-compatible: FDR (56Gb/s) and below at the link layer
- Condition: Refurbished, tested
Compatibility & Constraints: Compatible with Mellanox ConnectX-4 / ConnectX-5 / ConnectX-6 EDR HCAs and any QSFP28 EDR-capable adapter, plus Mellanox QSFP28 EDR copper DACs and active optical cables (e.g., MFA1A00 series, MCP1600 series). NOT a managed switch — pair with an OpenSM host or a managed Switch-IB peer. Not HDR (200Gb/s) or NDR (400Gb/s) capable. P2C airflow (1BFC variant has reverse C2P airflow) — verify aisle alignment before installation.
Why TES: T.E.S IT-SOLUTIONS specializes in refurbished NVIDIA Mellanox enterprise networking hardware. This MSB7790-ES2F ships from EU stock with 1–3 day handling. For matching cabling, EDR-to-HDR migration paths, or a managed alternative, contact TES.