NVIDIA Mellanox® MQM9700-NS2R Quantum-2 64-Port NDR InfiniBand Switch, 32 OSFP, Managed, C2P Airflow

Technical Identity
The NVIDIA Mellanox® MQM9700-NS2R is a managed 1U Quantum-2 NDR InfiniBand switch built on the QM9700 ASIC. Its 32 physical OSFP cages each carry two NDR 400Gb/s lanes, yielding 64 logical NDR ports per chassis. Aggregate switching capacity is 51.2 Tb/s with sub-100 ns port-to-port cut-through latency. The "NS2R" suffix denotes Connector-to-Power (C2P, reverse) airflow. New, factory-sealed unit running NVIDIA MLNX-OS / Onyx with an embedded subnet manager.

Specifications

OEM: NVIDIA Mellanox
Part Number (MPN): MQM9700-NS2R
ASIC / Switch silicon: Quantum-2 (QM9700)
Protocol: InfiniBand only (NDR)
Physical cages: 32 × OSFP
Logical NDR ports: 64 (2 × 400Gb/s per OSFP cage)
Per-port speed: 400 Gb/s NDR (8 lanes × 100Gb/s PAM4)
Aggregate switching capacity: 51.2 Tb/s
Throughput: >66.5 billion packets per second (BPPS)
Port-to-port latency: <100 ns cut-through
Form factor: 1U, 19" rack-mount
Airflow: C2P (Connector-to-Power, reverse / rear-to-front)
Management: Managed — NVIDIA MLNX-OS / Onyx via console, SSH, SNMP, REST API, Web UI
Subnet manager: Embedded, scales to ~2,000 endpoints
Acceleration: SHARPv3 in-network collective offload, Adaptive Routing, Congestion Control, SHIELD self-healing
Power: Dual redundant hot-swap PSU
Cooling: Hot-swap fan modules (C2P airflow)
Standards: IBTA NDR, RoHS, REACH, CE, FCC
Condition: New, factory-sealed


What This Is NOT

Not an Ethernet switch. Quantum-2 is InfiniBand only. For comparable Ethernet port density, use NVIDIA Spectrum-4 (SN5400 / SN5600).
Not P2C airflow. NS2R = C2P (reverse). The forward-airflow (P2C) sibling is MQM9700-NS2F.
Not unmanaged. The unmanaged Quantum-2 64-port variants are MQM9790-NS2R / NS2F.
Not a QSFP switch. Cages are OSFP only — no QSFP28, QSFP56, or SFP/SFP28 ports.
Not bundled with cables, optics, rail kit, or transceivers — those are separate SKUs.


Compatibility & Constraints

Cabling — DAC / AOC / splitter: NDR OSFP families MCP4Y10 / MCP7Y10 (DAC, copper, ≤4m), MFA7U10 / MCA7J (AOC, active-optical), MCA7J50-N / MCP7Y50-N (1:2 and 1:4 OSFP-to-2×OSFP / 4×OSFP NDR-200 splitters for HDR / NDR-200 endpoints).
Cabling — transceivers + fiber: NDR OSFP transceivers MMA4Z00-NS / MMS4X00-NS plus MMF / SMF MPO-12 jumpers for inter-rack and longer reaches.
Adapter compatibility (pairs-with, separate SKU): NVIDIA ConnectX-7 (NDR / 400Gb/s native), ConnectX-6 / ConnectX-6 Dx (HDR / 200Gb/s via NDR-200 splitter), BlueField-3 DPU (NDR).
Fabric scale: Embedded subnet manager up to ~2,000 nodes. Larger fabrics → external NVIDIA UFM appliance.
Airflow alignment: Confirm rack hot-aisle / cold-aisle orientation. C2P (reverse) draws air from the cable side toward the PSU/management side.
Typical workloads: AI training clusters (DGX / HGX H100 / H200), HPC supercomputing, large-scale RDMA storage, low-latency financial fabrics.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MQM9700-NS2R?
The MQM9700-NS2R is a managed 1U NVIDIA Quantum-2 NDR InfiniBand switch. It has 32 OSFP cages exposing 64 logical NDR 400Gb/s ports, 51.2 Tb/s aggregate switching capacity, sub-100 ns port-to-port latency, and Connector-to-Power (C2P / reverse) airflow.
Q. What is the difference between MQM9700-NS2R and MQM9700-NS2F?
Both are functionally identical Quantum-2 64-port NDR managed switches. The difference is airflow direction: NS2R is Connector-to-Power (reverse / rear-to-front), NS2F is Power-to-Connector (forward / front-to-rear). Choose based on the rack's hot-aisle / cold-aisle alignment.
Q. Does this switch support Ethernet?
No. The MQM9700-NS2R is InfiniBand only. For comparable port density on Ethernet, see the NVIDIA Spectrum-4 SN5400 / SN5600 series.
Q. What scale does the embedded subnet manager support?
The internally managed firmware includes a subnet manager that supports InfiniBand fabrics up to approximately 2,000 endpoints. Larger fabrics use an external NVIDIA Unified Fabric Manager (UFM) appliance.
Q. Which cables and adapters pair with this switch?
NDR OSFP DAC / AOC / transceivers (MCP4Y / MCP7Y / MFA7U / MMA4Z / MMS4X families) and OSFP splitters (MCA7J / MCP7Y to 2× or 4× NDR-200). Compatible adapters: ConnectX-7 native NDR; ConnectX-6 / 6 Dx and BlueField-3 via NDR-200 splitter cabling.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist serving HPC, AI, and enterprise data-center procurement teams since 2007. Every unit is verified by MPN, NVIDIA P/N, and ASIC generation before shipping. Free pre-sale compatibility advice for switch / adapter / cable pairing, multi-currency B2B invoicing, EU stock with worldwide express logistics, and direct contact with our engineering team — never a call center.