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NVIDIA SN4600C Spectrum-3 Ethernet Switch with Cumulus Linux

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MSN4600-CS2FC

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$26,741.67
Product Type: Ethernet Switch
Product Family: Mellanox Switch, Spectrum, Spectrum-3 MSN4600C, Spectrum-3 SN4000
Brand Name: NVIDIA
Form Factor: Rail-mountable
Ethernet Technology: 100 Gigabit Ethernet
Product Brief: MSN4600-CS2FC

NVIDIA Spectrum-3 based 400GbE 1U Open Ethernet Switch with Cumulus Linux, 32 QSFPDD ports, 2 Power Supplies (AC), x86 CPU, standard depth, P2C airflow, Rail Kit

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Overview

The NVIDIA Spectrum SN4600C is a 2U open Ethernet switch featuring 64×100GbE QSFP28 ports, delivering up to 6.4Tbps switching capacity and 8.48 billion packets per second processing capacity. Designed for spine and super-spine deployments in large virtualized data centers and cloud environments, it supports diverse Ethernet port speeds from 10G to 100G and flexible deployment options. The SN4600C supports multiple operating systems, including Cumulus Linux and SONiC, making it ideal for high-performance fabrics.

Use Cases

  • Spine and super-spine switch in large-scale CLOS fabrics
  • High-density 100GbE switching for cloud and virtualization
  • Multi-speed Ethernet support: 10G, 25G, 40G, 50G, 100G
  • Cumulus Linux, SONiC, and open NOS deployments

Ports & Optics

  • 64 × 100GbE QSFP28 ports
  • Supports breakout to 128 × 50GbE or 128 × 25GbE
  • Supports 10/25/40/50/100GbE speeds via breakout
  • QSFP28 optics with DAC support up to 3m
  • 1 × RJ45 Management, 1 × Console, 1 × USB Type-A

Platform Features

  • ONIE preloaded (SONiC NOS ready)
  • Pre-loaded with Cumulus Linux and ONIE
  • Advanced Layer 2–7 features including VXLAN, segment routing, and RDMA
  • NVIDIA What Just Happened® (WJH) telemetry and streaming telemetry support
  • Programmable packet processing pipeline and deep packet inspection
  • 512,000 forwarding entries shared across ACLs, LPM, MAC, ECMP, and tunnels

Switch Hardware

  • Switching capacity: 6.4 Tbps
  • Wire-speed forwarding: 8.48 billion packets per second
  • Latency: 560 ns (cut-through mode)
  • Quad-core x86 CPU
  • 8GB DDR RAM
  • 32GB SSD storage
  • Packet buffer: 64 MB

Cooling & Power

  • 2U rackmount chassis
  • 2 hot-swappable redundant power supplies (1+1)
  • 3 hot-swappable fans with N+1 redundancy
  • Reversible airflow for flexible deployment
  • Power supply: 50–60Hz, 100–264Vac

Environmental

  • Operating temperature: 0°C to 40°C
  • Humidity: 10% to 85% non-condensing
  • Altitude: up to 3050m
  • Noise level: 73.7 dB(A)
  • MTBF: >150,000 hours
  • Certifications: CE, FCC, VCCI, UL, RoHS

Ordering Information

  • 920-9N302-00F7-0C2: MSN4600-CS2FC, 2U, 64x100GbE, Cumulus Linux, P2C airflow, Rail Kit
Specifications
Dimensions 16.9 × 3.5 cm
Product Type

Ethernet Switch
Product Family

Mellanox Switch, Spectrum, Spectrum-3 MSN4600C, Spectrum-3 SN4000
Brand Name

NVIDIA
Form Factor

Rail-mountable
Ethernet Technology

100 Gigabit Ethernet
Media Type Supported

Optical Fiber
Manageable

Yes
Expansion Slot Type

QSFP28
Power Source

Power Supply
Layer Supported

3
Supported NOS

Cumulus Linux
Questions & Answers

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Question:

Is the SN4600C fully supported with Cumulus Linux, and are there any specific OS features optimized for this switch?
[email protected]
16-Jul-2025

Answer:

Yes, the SN4600C is fully supported by Cumulus Linux. NVIDIA’s integration ensures that the Spectrum-3 ASIC’s advanced features such as VXLAN offload, segment routing, and deep packet inspection are fully leveraged by Cumulus Linux.

Question:

Are there any benefits of running SONiC on this platform?
[email protected]
16-Jul-2025

Answer:

Cumulus Linux offers a full Linux OS experience with extensive scripting and automation capabilities, ideal for teams with Linux networking expertise wanting fine control over network behavior. SONiC provides a modular, container-based NOS architecture focused on cloud-native scalability and rapid feature iteration. Both support the SN4600C’s hardware acceleration, but Cumulus is preferred for environments requiring deep customization, while SONiC excels in hyperscale and rapid deployment scenarios. Note that Cumulus Linux is already pre-loaded on the platform and there is no economic benefit from a Capex perspective to go with SONiC since you would have already paid for the NVIDIA Cumulus Linux licence + support.

Question:

Can the SN4600C handle multi-speed breakout configurations on all ports, and how does Cumulus Linux manage these?
[email protected]
16-Jul-2025

Answer:

Yes, the SN4600C supports breakout configurations, allowing QSFP28 ports to split into multiple lower-speed interfaces such as 50GbE or 25GbE.

Question:

What troubleshooting tools and commands are recommended on the SN4600C w/Cumulus?
[email protected]
16-Jul-2025

Answer:

You can use standard Linux tools (tcpdump, ip, ethtool), Cumulus-specific commands (net show, net add), and NVIDIA telemetry utilities (wjh-cli) for monitoring. You can also integrate with streaming telemetry tools such as Prometheus and Grafana is also recommended for continuous health monitoring.

Question:

Is Onyx still supported on this switch? Also, can I buy it bare metal (without any OS installed)?
[email protected]
16-Jul-2025

Answer:

Onyx is EOL is and is in maintenance mode. The recommended NOS is Cumulus Linux, which is NVIDIA's flagship NOS now. Cumulus Linux comes pre-loaded on the SN4600C, so you unfortunately cannot get it bare metal.

Question:

Does it support segment routing?
[email protected]
16-Jul-2025

Answer:

The Spectrum-3 ASIC used in this switch supports segment routing capabilities at the hardware level, including features like SRv6 and advanced packet parsing. However, segment routing support ultimately depends on the NOS used and its ability to expose those features. We have not tested SR support with Cumulus Linux or SONiC on the Spectrum 3 platform.
Warranty
All new products are covered by the manufacturer warranty. To claim warranty, you may contact the manufacturer directly or contact your account executive at Hardware Nation. We can help facilitate the warranty processes between the customer and manufacturer.
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