NVIDIA Mellanox MSN4600-CS2RO Spectrum-3 2U 64-Port 100GbE Open Ethernet Switch — ONIE-only: This is a 2U fixed-form-factor Open Ethernet top-of-rack/aggregation switch built on the NVIDIA Spectrum-3 ASIC, with 64 QSFP28 ports of 100GbE, C2P (Connector-to-Power) airflow, and dual redundant AC PSUs. The unit ships with ONIE only — no NOS pre-installed. This is NOT the Cumulus pre-loaded "-CS2RC" variant nor the Onyx "-CS2R" variant. NVIDIA P/N 920-9N302-00R7-0N0. This is a refurbished unit.
Engineering Context
The MSN4600-CS2RO delivers line-rate 100GbE switching across all 64 QSFP28 ports using NVIDIA Spectrum-3 silicon, which provides deterministic low latency, a unified shared buffer for fairness under microbursts, and full streaming telemetry. Shipping with ONIE allows operators to install any compatible Open Ethernet NOS (SONiC, Cumulus Linux, DENT, etc.). C2P airflow puts intake on the cabling face for hot-aisle/cold-aisle deployments where ports face the cold aisle.
Deployment & Use Cases
Leaf or spine layer of 100GbE leaf-spine Ethernet fabrics with the operator's choice of NOS. EVPN-VXLAN overlay deployments in cloud and enterprise data centers. Aggregation for AI/ML clusters and HPC compute pods using ConnectX-5/6 adapters. Storage networking with RoCEv2 over 100GbE.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSN4600-CS2RO (NVIDIA P/N 920-9N302-00R7-0N0)
Form Factor: 2U fixed rackmount
Switching ASIC: NVIDIA Spectrum-3
Ports: 64 x QSFP28 (100GbE per port)
Throughput Class: Line-rate 6.4 Tb/s switching capacity
CPU: x86 management processor
Operating System: ONIE only — no NOS pre-installed
Airflow: C2P (Connector-to-Power)
Power Supplies: Dual AC, redundant
Architecture: Open Ethernet
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Mellanox QSFP28 100GbE optics, AOCs, and DACs (e.g., MMA1B00 family, MFA1A00 AOCs, MCP1600 DACs) and ConnectX-4/5/6 adapters in 100GbE mode. ONIE-bootable; a NOS image must be installed by the operator (no NOS license is included with this SKU). Airflow is C2P only; for P2C airflow a different SKU is required. Rail kit is NOT included unless otherwise specified. Not an InfiniBand HDR/NDR switch.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS validates each switch for port reachability, PSU redundancy, thermal stability, and ONIE boot integrity before shipment. We provide expert consultation on 100GbE Ethernet fabric design, NOS selection (SONiC, Cumulus, DENT), global shipping, and a comprehensive warranty. View this product. Handling time 1–3 business days.