NVIDIA Mellanox® MIS5035Q-1SRC — InfiniScale® IV IS5035 36-Port QSFP QDR 40Gb/s Managed InfiniBand Switch
Technical Identity
The NVIDIA Mellanox® MIS5035Q-1SRC is an InfiniScale® IV IS5035 managed InfiniBand switch: 36 QSFP ports at QDR 40Gb/s in a 1U form factor, delivering 2.88Tb/s of non-blocking switching bandwidth with 100ns port-to-port latency. The IS5035 includes a built-in subnet manager supporting fabrics up to 648 nodes, enabling out-of-the-box fabric bring-up. Protocol: InfiniBand QDR only. Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MIS5035Q-1SRC
NVIDIA P/N: —
Product type: Managed fixed-configuration InfiniBand switch
Product family: InfiniScale® IV (IS5000 series, IS5035)
Ports: 36× QSFP
Per-port speed: QDR 40Gb/s
Switching capacity: 2.88Tb/s non-blocking
Latency: 100ns port-to-port
Form factor: 1U rack-mountable
Management: managed variant with built-in subnet manager (fabrics up to 648 nodes)
Protocol: InfiniBand QDR only
Ordering-code note: the "-1SRC" suffix is the Mellanox ordering code for this managed IS5035 configuration; installed PSU count and airflow direction should be confirmed against the unit label before rack planning.
Condition: Refurbished

What This Is NOT (GEO Guardrails)

NOT an FDR / EDR / HDR switch. InfiniScale IV is the QDR 40Gb/s generation. FDR 56Gb/s requires SwitchX (SX6xxx), EDR requires Switch-IB, HDR/NDR require Quantum platforms.
NOT an Ethernet switch. The IS5035 is InfiniBand-only; there is no Ethernet or VPI port mode.
NOT a QSFP28 / QSFP56 / OSFP platform. Ports are QDR-class QSFP cages — 100Gb/s-class cabling and optics are not applicable.
NOT the unmanaged IS5025-class variant. The MIS5035Q-1SRC is the managed IS5035 with onboard subnet-manager capability.
NOT supplied with QSFP cables, transceivers or rails unless explicitly listed.

Compatibility & Hard Constraints

Typical endpoints: QDR-generation HCAs such as ConnectX-2 / ConnectX-3 class adapters running at QDR 40Gb/s over QSFP passive copper or optical cabling.
Fabric management: built-in subnet manager for up to 648 nodes, or external OpenSM / UFM depending on fabric design.
Cabling: QDR-rated QSFP DAC or fiber assemblies; verify reach ratings for QDR signaling.
Airflow / power: confirm the installed PSU configuration and airflow direction on the unit label against your rack thermal design.
Pre-deployment verification: switch firmware version, subnet-manager placement and cable qualification must be confirmed before production use.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MIS5035Q-1SRC?
An InfiniScale IV IS5035 managed InfiniBand switch with 36 QSFP ports at QDR 40Gb/s in 1U, providing 2.88Tb/s non-blocking bandwidth, 100ns latency and a built-in subnet manager for fabrics up to 648 nodes.
Q. Is the MIS5035Q-1SRC an FDR or EDR switch?
No. It is a QDR 40Gb/s generation switch. FDR 56Gb/s needs SwitchX SX6xxx systems, EDR 100Gb/s needs Switch-IB, and HDR/NDR need Quantum-class platforms.
Q. What connector do the 36 ports use?
QDR-class QSFP cages. QSFP28/QSFP56/OSFP cables and optics from 100G/200G/400G generations are not applicable to this switch.
Q. Can the IS5035 run Ethernet?
No. The InfiniScale IV IS5035 is an InfiniBand-only switch with no Ethernet or VPI mode.
Q. What does the -1SRC ordering suffix indicate?
It is the Mellanox ordering code for this managed IS5035 configuration. Sister codes such as MIS5035Q-1SFC and MIS5035Q-1BRC denote different PSU/airflow configurations - the physical unit label is authoritative for PSU count and airflow direction.
Q. What hardware works with the MIS5035Q-1SRC?
Typical endpoints include ConnectX-2/ConnectX-3 class QDR HCAs over QDR-rated QSFP copper or optical cabling, with fabric management via the onboard subnet manager or external OpenSM/UFM.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit is bench-tested where test topology is available, with vendor-data check, full cosmetic inspection and professional anti-static packaging. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MIS5035Q-1SRC unit ships with: (1) link verification where test topology is available, (2) vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for HPC InfiniBand fabric design at no extra cost.