NVIDIA Mellanox® MSX1024B-1BFS — SwitchX-2 48× 10GbE SFP+ + 12× 40GbE QSFP+ 1U Managed Ethernet Switch (SX1024)

Technical Identity
The MSX1024B-1BFS is the Mellanox SX1024 — a 1U managed Ethernet top-of-rack / aggregation switch built on the SwitchX-2 ASIC. It exposes 48× SFP+ ports at 10 GbE plus 12× QSFP+ ports at 40 GbE for a non-blocking 1.92 Tb/s switching capacity and a port-to-port latency in the ~250 ns range. The -1BFS suffix denotes the single hot-swap AC PSU configuration with forward (P2C — port-to-PSU) airflow. The switch is Ethernet-only and runs MLNX-OS (re-branded as NVIDIA Onyx in later releases).

Specifications

OEM / brand: NVIDIA Mellanox
Part number (MPN): MSX1024B-1BFS
System / product family: SX1024 (SwitchX-2 ASIC, 40 nm)
Form factor: 1U, 19" rack-mount
Ports: 48× SFP+ (10 GbE) + 12× QSFP+ (40 GbE)
Switching capacity: 1.92 Tb/s, non-blocking
Forwarding rate: ~1.43 Bpps
Port-to-port latency: ~250 ns (cut-through)
Protocol: Ethernet only — no InfiniBand
Breakout support: each QSFP+ port can split 1→4 into 4× SFP+ 10 GbE via QSFP+→4× SFP+ DAC/AOC splitter (max 48 + 48 = 96× 10 GbE ports)
Power: 1× hot-swappable AC PSU (single-PSU SKU)
Cooling: hot-swappable fan modules; forward (P2C) airflow — port-side intake, PSU-side exhaust
Management: out-of-band 1 GbE management port, RJ45 console, USB
Operating system: MLNX-OS / NVIDIA Onyx
Condition: New, factory-sealed


What This Is NOT

NOT an InfiniBand switch. SX1024 is the Ethernet-only configuration of SwitchX-2 — no IB subnet manager, no IB SerDes mode. For InfiniBand FDR on the same silicon, see SX6036 / SX6025. For HDR / NDR IB, see Quantum (MQM87xx) / Quantum-2 (MQM97xx).
NOT a Spectrum-series switch. SwitchX-2 (40 nm) is the generation before Spectrum (SN2000) and Spectrum-2 (SN3000) — feature gaps include line-rate VXLAN routing, EVPN, and modern WJH telemetry.
NOT a NIC, adapter, splitter cable, or transceiver. This is a rack-mount switch chassis only.
NOT bundled with optical transceivers, DAC/AOC cables, rail kit, or country-specific power cords unless explicitly stated.
NOT compatible with QSFP28 or QSFP56 modules. QSFP+ cages are 40 Gb/s only (electrically 4× 10G NRZ).


Compatibility

Server-side NICs: any MSA-compliant 10 GbE / 40 GbE NIC with SFP+ or QSFP+ cages — NVIDIA / Mellanox ConnectX-3, ConnectX-3 Pro, ConnectX-4 Lx (10/25/40 GbE), ConnectX-4 (Ethernet mode), and 10/40 GbE adapters from Intel, Broadcom, and Marvell.
Optics & cables: standard MSA SFP+ (10GBASE-SR / -LR / -ER, 10G DAC, 10G AOC) and QSFP+ (40GBASE-SR4 / -LR4, 40G DAC, 40G AOC, 40G-to-4×10G splitter cables). Third-party transceivers operate; vendor-coded modules may require port-level "force" configuration in MLNX-OS.
Spine / aggregation: pairs with Mellanox SX6036 / SX1410 / SX1710 or third-party 40 / 100 GbE aggregation via 40G uplinks (single 40G or 4×10G LAG / MLAG).
Management: MLNX-OS / NVIDIA Onyx via RJ45 console (115200 baud), SSH, REST API, SNMP v2c/v3, JSON-RPC, and Web UI. Ansible and Puppet integration is supported.
DCB / lossless: PFC, ETS, DCBX, and ECN are supported for RoCE v1/v2 and lossless storage networking (iSCSI, NVMe-oF/TCP, NFS over RDMA).


FAQ
Q: What is the NVIDIA Mellanox MSX1024B-1BFS?

A: A 1U managed Ethernet ToR / aggregation switch (Mellanox SX1024) with 48× 10 GbE SFP+ and 12× 40 GbE QSFP+ ports, based on the SwitchX-2 ASIC. It delivers 1.92 Tb/s non-blocking throughput, runs MLNX-OS / NVIDIA Onyx, and ships with a single hot-swap AC PSU and forward (P2C) airflow.

Q: Does this switch support InfiniBand?

A: No. The SX1024 is the Ethernet-only configuration of SwitchX-2. For InfiniBand FDR on the same silicon, use SX6036 / SX6025 / SX6005. For HDR or NDR InfiniBand, use Quantum (MQM87xx) or Quantum-2 (MQM97xx).

Q: Can the 40 GbE QSFP+ ports be broken out to 4× 10 GbE?

A: Yes. Each of the 12 QSFP+ ports supports a 1→4 breakout to 4× SFP+ 10 GbE using a QSFP+ to 4× SFP+ DAC or AOC splitter cable (for example MC2609125-005). Fully populated this yields 48 + 48 = 96× 10 GbE ports in 1U.

Q: What does the airflow code "-1BFS" mean?

A: Forward (P2C — port-to-PSU) airflow. The cold-aisle side is the port side; the hot-aisle side is the PSU / fan side. Match this to your data-center hot / cold aisle layout — do not mix forward and reverse airflow switches in the same rack row.

Q: Is this a Spectrum switch?

A: No. SwitchX-2 (40 nm, MLNX-OS) is the generation before Spectrum (16 nm, MLNX-OS / Cumulus / NVIDIA Onyx, SN2000 series). Spectrum-2 (SN3000) and Spectrum-3 (SN4000) are later generations with line-rate VXLAN routing, EVPN, and WJH telemetry.

Q: Is the unit new or refurbished?

A: New, factory-sealed in original NVIDIA / Mellanox packaging.

Why T.E.S IT-SOLUTIONS
Every MSX1024B-1BFS is bench-tested by T.E.S IT-SOLUTIONS prior to shipment: PSU load test, fan / thermal verification, console boot, MLNX-OS POST, and port-by-port link establishment across both SFP+ and QSFP+ cages. Anti-static packaging, EU stock, global B2B shipping, and technical consultation for Mellanox 10 / 40 GbE leaf-spine, HPC, and storage-fabric deployments.