NVIDIA Mellanox® MQM8700-HS2R — Quantum HDR 200Gb/s Managed InfiniBand Switch (40-Port QSFP56, C2P Airflow)

Technical Identity
The NVIDIA Mellanox® MQM8700-HS2R is a 1U, 40-port QSFP56 HDR 200Gb/s Managed InfiniBand Switch built on the NVIDIA Quantum-1 ASIC. The "HS2R" suffix decodes as: H = HDR 200Gb/s, S = Managed with embedded Subnet Manager (UFM-ready), 2 = dual hot-swap PSUs, R = Reverse (C2P) airflow. Aggregate switching capacity is 16 Tb/s bidirectional with up to 15.8 Bpps and ~130 ns port-to-port latency. Supplied as Refurbished Grade A, bench-tested by T.E.S IT-SOLUTIONS in EU stock.

Specifications

Brand / OEM: NVIDIA Mellanox
MPN: MQM8700-HS2R
Family: Quantum-1 HDR InfiniBand Switch
ASIC: NVIDIA Quantum-1
Ports: 40 × QSFP56 (HDR 200Gb/s per port)
Protocol: InfiniBand HDR / HDR100 / EDR / FDR (IB-only — NOT Ethernet)
Aggregate bandwidth: 16 Tb/s bidirectional
Forwarding rate: Up to 15.8 Bpps
Latency: ~130 ns port-to-port
Management: Managed — embedded Subnet Manager (S), MLNX-OS
PSU: Dual hot-swap (2), 1+1 redundant
Airflow: Reverse C2P (connector-side intake, PSU-side exhaust)
Form factor: 1U 19" rack-mount
Acceleration: SHARPv2 collective offload, SHIELD self-healing
Condition: Refurbished Grade A — bench-tested by T.E.S


Capabilities & Features

SHARPv2 — offloads MPI / NCCL AllReduce into the switch fabric for HPC and AI training.
SHIELD self-healing — sub-microsecond autonomous link-fault recovery.
Adaptive Routing and Congestion Control for multi-rail fabrics.
Cut-through, non-blocking architecture with per-port telemetry.
Embedded Subnet Manager (UFM-ready) — no external SM host required for small/mid-size fabrics.
HDR100 split mode — 2 × 100Gb/s per QSFP56 = up to 80 × HDR100 endpoints from one 1U.


Deployment & Use Cases

HPC InfiniBand fabric backbone (spine/leaf in fat-tree, dragonfly, torus).
AI / DL training cluster interconnect — NCCL AllReduce via SHARPv2.
NVMe-oF and parallel file systems (Lustre, GPFS, BeeGFS, WekaIO) at HDR.
Low-latency financial / analytics fabrics.
Airflow note: "R" / C2P variant for cold-aisle cable entry, hot-aisle PSU exhaust.


What This Is NOT

NOT an Ethernet switch. Quantum-1 is IB-only. For 200/400GbE Ethernet use Spectrum (SN3700 / SN4700).
NOT a NIC, HCA, or adapter card. 1U rack switch — needs rack space, dual feeds, proper airflow.
NOT bundled with QSFP56 transceivers, AOC / DAC cables, or rail kit unless stated.
NOT the P2C variant. "-HS2R" is Reverse (C2P). For P2C / forward airflow order MQM8700-HS2F.
NOT the unmanaged variant. "S" = Managed + SM. Externally-managed counterpart is MQM8790-HS2F/R.


Compatibility & Constraints

Host adapters: ConnectX-6 (MCX65xx / MCX653xxx) for native HDR; ConnectX-7 interoperates at HDR. ConnectX-5 EDR negotiates to 100Gb/s.
Cabling: QSFP56 DAC (MCP1650-Hxxx), HDR AOC (MFA7U10-Hxxx), or HDR transceivers + MMF MPO. HDR100 split: MCP7H50 / MFS1S50 series.
Management: MLNX-OS via console, SNMP, REST, Web UI, JSON-RPC. NVIDIA UFM Enterprise for fabric-scale monitoring.
Power: Dual AC PSU (1+1) — connect both feeds for redundancy.
Rack: 1U 19" — rail kit sold separately.
Firmware: verify MLNX-OS aligns with UFM and host driver (MLNX_OFED / DOCA).


Frequently Asked Questions (FAQ)
Q. What exactly is the NVIDIA Mellanox MQM8700-HS2R?
A 1U, 40-port QSFP56 Quantum-1 HDR 200Gb/s Managed InfiniBand switch with embedded Subnet Manager, dual hot-swap PSUs, and Reverse (C2P) airflow. 16 Tb/s aggregate.
Q. Does the MQM8700-HS2R support Ethernet?
No. Quantum-1 is InfiniBand-only (HDR / HDR100 / EDR / FDR). For Ethernet at 200/400GbE use the NVIDIA Spectrum family (SN3700 / SN4700).
Q. What does the "HS2R" suffix mean?
H = HDR 200Gb/s, S = Managed with embedded Subnet Manager (UFM-ready), 2 = dual hot-swap PSU, R = Reverse / C2P airflow. P2C counterpart is MQM8700-HS2F.
Q. Which host adapters work with this switch?
ConnectX-6 (HDR-native) and ConnectX-7 are the recommended HDR endpoints. ConnectX-5 EDR interoperates at 100Gb/s. HDR100 split via 1-to-2 QSFP56 splitter cables yields up to 80 × 100Gb/s endpoints.
Q. Is SHARP / in-network computing supported?
Yes. SHARPv2 collective offload (AllReduce, Barrier, Broadcast) for MPI/NCCL, plus SHIELD self-healing and adaptive routing.
Q. What condition is this unit?
Refurbished Grade A. Bench-tested by T.E.S IT-SOLUTIONS: link establishment, port-by-port traffic validation, EEPROM check, cosmetic inspection. Ships from EU stock in anti-static packaging.

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 since 2007. Every Quantum / Spectrum / ConnectX / BlueField unit is identified by MPN, NVIDIA P/N, and ASIC generation before it ships. Pre-sale compatibility consultation for switch / adapter / cable pairing is included at no extra cost — we will not let you mix a Quantum-1 HDR switch with an Ethernet-only NIC or the wrong airflow direction. Multi-currency B2B invoicing, EU stock with worldwide express shipping, direct engineering contact.