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DESCRIPTION
SPECIFICATIONS
INCLUDED
WARRANTY
SHIPPING
FAQS
DESCRIPTION
NVIDIA MSN4600-CS2RC – SN4600C 64 x QSFP28 100GbE Open Ethernet Switch
The MSN4600-CS2RC is an NVIDIA SN4600C series fixed-configuration Open Ethernet switch built on the NVIDIA Spectrum-3 ASIC, providing 64 x QSFP28 100GbE in a 2U form factor. It delivers 12.8 Tbps of switching throughput and processes up to 8.4 Bpps, backed by a 64 MB fully shared packet buffer. NVIDIA’s official ordering description: “NVIDIA Spectrum-3 based 100GbE 2U Open Ethernet switch with Cumulus Linux, 64 QSFP28 ports, 2 AC PSUs, x86 CPU, standard depth, rail kit”.
Key Features
Ports: 64 x QSFP28 100GbE
Port speeds: 1/10/25/40/50/100GbE per port
Throughput: 12.8 Tbps
Packet rate: 8.4 Bpps
Packet buffer: 64 MB, fully shared across all ports
Software: Cumulus Linux factory designation – note: software licensing, subscription and support entitlements are not conveyed with refurbished hardware
Airflow: C2P (connector-to-power) – air intake at the connector (port) side, exhaust at the power/fan (rear) side (red FRU handles/dots)
Power supplies: 2 hot-swappable AC PSUs (1+1 redundant)
Dimensions (HxWxD): 3.46 x 16.85 x 22.3 in (88 x 428 x 566.4 mm)
Part numbers: Legacy OPN MSN4600-CS2RC = NVIDIA 920-9N302-00R7-0C0 (same hardware)
Port Flexibility and Breakout
Each QSFP28 port splits to 4 x 25GbE / 4 x 10GbE or 2 x 50GbE, for up to 256 x 25GbE per system. Actual modes depend on the installed network OS version and transceivers.
Spectrum-3 Architecture
SN4600C systems are built on the NVIDIA Spectrum-3 switching ASIC with a fully shared, monolithic packet buffer – every port can draw on the entire buffer, which absorbs microbursts and many-to-one incast far better than segmented-buffer designs in the same class. The platform supports RoCE (RDMA over Converged Ethernet) for storage and AI east-west traffic, rich telemetry with NVIDIA What Just Happened (WJH) hardware-level visibility, and the Open Ethernet model: the same hardware runs multiple network operating systems, so the fabric is never locked to one vendor stack.
Deployment Scenarios
Super-spine and aggregation layers: 64 high-speed ports in 2U concentrate an entire pod
Storage backends: RoCE-optimized forwarding for NVMe-oF and distributed storage east-west traffic
High-radix leaf-spine designs: breakout support drives very high 25/50/100GbE port counts from one box
Choosing Among the Variants
SN4600C OPNs decode as follows: the letter before the airflow character sets the speed class (B = the lower speed build, C = 100GbE, V = 200GbE, W = 400GbE); F = P2C airflow (power-side intake, port-side exhaust) and R = C2P airflow (port-side intake, power-side exhaust); a trailing C = Cumulus Linux, a trailing O = ONIE only, and no trailing letter = NVIDIA Onyx. Important: NVIDIA’s F/R airflow letters are defined by intake side at the power side or connector side – do not assume they match other vendors’ F/R conventions. Match the airflow variant to your hot-aisle/cold-aisle layout and the software designation to your operations model; the underlying switch hardware within a speed class is otherwise identical.
Mellanox and NVIDIA Part Numbers
The SN4600C was designed by Mellanox Technologies, which NVIDIA acquired in 2020; the same platform has been sold under both the Mellanox and NVIDIA names. It carries two interchangeable part numbers: the original Mellanox-style OPN MSN4600-CS2RC and the newer NVIDIA number 920-9N302-00R7-0C0 – both identify exactly the same hardware. Listings and documentation referring to a “Mellanox SN4600C” and an “NVIDIA SN4600C” describe the same switch.
Frequently Asked Questions
Is the MSN4600-CS2RC a Mellanox switch or an NVIDIA switch?
Both names refer to the same product. The SN4600C platform was developed by Mellanox, which NVIDIA acquired in 2020. The OPN MSN4600-CS2RC and the NVIDIA part number 920-9N302-00R7-0C0 identify identical hardware.
What software does the MSN4600-CS2RC run?
This OPN designates a factory build with Cumulus Linux, NVIDIA’s Linux-native network OS for automation-driven fabrics. As with all refurbished hardware, software licensing, subscription and support entitlements are not conveyed with refurbished hardware – units are tested on original-spec firmware, factory reset, and configuration wiped. Confirm any OS licensing or support requirements with NVIDIA for your production environment.
What is the airflow direction of the MSN4600-CS2RC?
The MSN4600-CS2RC is the C2P (connector-to-power) variant: air intake at the connector (port) side, exhaust at the power/fan (rear) side. NVIDIA marks this direction with red handles or dots on the fan and PSU modules. All FRUs in one chassis must share the same airflow direction.
What breakout options does the MSN4600-CS2RC support?
Each QSFP28 port splits to 4 x 25GbE / 4 x 10GbE or 2 x 50GbE, for up to 256 x 25GbE per system.
Is the refurbished MSN4600-CS2RC tested before shipping?
Yes. BrightStar Systems inspects and tests every unit on original-spec firmware, performs a factory reset and configuration wipe, and backs it with warranty (1 year end-user / 90 days reseller).
MSN4410-WS2FC – related SN4410 platform – 24 x QSFP28-DD 100GbE + 8 x QSFP-DD 400GbE
Browse the full lineup on the NVIDIA Switches category page.
Refurbished by BrightStar Systems
BrightStar Systems supplies professionally tested refurbished NVIDIA and Mellanox networking hardware. Every unit is inspected, tested on original-spec firmware, factory reset, and configuration wiped before shipment, and backed by our standard warranty. Data center switching of this class is typically project-priced – request a quote for current availability and pricing.
SPECIFICATIONS
Model: MSN4600-CS2RC
Type: NVIDIA SN4600C Spectrum-3 Open Ethernet switch, 2U
Ports: 64 x QSFP28 100GbE
Throughput: 12.8 Tbps | Buffer: 64 MB
Software: Cumulus Linux (license not included)
Airflow: C2P (port-side intake, rear exhaust)
Typical power: 466 W
INCLUDED
Model: MSN4600-CS2RC
Type: NVIDIA SN4600C (Spectrum-3) Open Ethernet switch, 2U
Ports: 64 x QSFP28 100GbE
Software designation: Cumulus Linux
Airflow: C2P (connector-to-power)
WARRANTY
1-Year BrightStar warranty for end user customers
90-Day BrightStar Warranty for resellers
SHIPPING
Free FedEx Ground shipping within the United States
FedEx Overnight shipping available as well
FedEx International Shipping available for customers outside of the United States
FAQS
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