NVIDIA MSN3420-CB2FC Spectrum-2 Based 25G/100G 1U Open Ethernet Switch with Cumulus Linux

MFR# MSN3420-CB2FC
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MSRP $24,395.00 Save $6,241.24
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Brand Name: NVIDIA
Product Type: Ethernet Switch
Product Family: Mellanox Switch,Spectrum,Spectrum-2 SN3000
Layer Supported: 3
Media Type Supported: Optical Fiber

NVIDIA MSN3420-CB2FC Spectrum-2 Based 25G/100G 1U Open Ethernet ONIE Switch with Cumulus Linux

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Overview

The NVIDIA Spectrum SN3420 is a 1U open Ethernet switch featuring 48×25GbE SFP28 ports and 12×100GbE QSFP28 ports, delivering up to 2.4Tbps switching capacity. Designed to evolve host connectivity from 10G to 25G and enable high-performance leaf-spine topologies, it supports flexible breakout options and provides 3.58 billion packets per second processing capacity. The SN3420 offers precision timing and compatibility with multiple operating systems, including Cumulus Linux and SONiC, making it an ideal choice for modern data centers.

Use Cases

  • Top-of-rack (ToR) switch in leaf-spine CLOS architectures
  • Scalable migration from 10G to 25G host connectivity
  • Enterprise aggregation and cloud fabric
  • Cumulus Linux, SONiC, and open NOS deployments

Ports & Optics

  • 48 × 25GbE SFP28 ports
  • 12 × 100GbE QSFP28 ports
  • Breakout: up to 96 × 50G or 96 × 25G (via breakout)
  • QSFP28 optics up to 3m DAC support
  • Optics power: up to 12W (B2F), 20W (F2B)
  • 1 × RJ45 Management, 1 × Console, 1 × USB Type-A

Switch Hardware

  • Switching capacity: 2.4 Tbps
  • 3.58 billion packets per second (Bpps) processing capacity
  • Dual-core x86 CPU
  • 8GB DDR RAM
  • 32GB SSD storage
  • Packet buffer: 42MB
  • Latency: 425ns (cut-through mode)

Platform Features

  • ONIE preloaded (SONiC NOS ready)
  • Pre-loaded with Cumulus Linux and ONIE
  • Timing: IEEE 1588v2 (1-step/2-step), SyncE, TC/BC
  • BMC with IPMI 2.0, Serial-over-LAN, remote upgrade
  • Layer 2–7 packet classification & telemetry support

Traffic Management

  • 802.3ad LACP, Q-in-Q, PVLAN, TRILL, PBB
  • Hardware IP routing: OSPF, BGP, IS-IS, VRF
  • Multicast: IGMPv1/2/3, PIM-SM, DM, SSM
  • DCBX, ETS, PFC, QCN (congestion control)
  • QoS: 2-rate, 3-color, SP, WRR, WDRR

Cooling & Power

  • 1RU rackmount chassis
  • 2 hot-swap power supplies (1+1 redundant)
  • Max draw: ~98W (with optics)
  • 5 hot-swappable fans (N+1 redundant)
  • Available in forward or reverse airflow

Environmental

  • Operating Temp: 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

  • 920-9N213-00F7-0C0: MSN3420-CB2FC, 1U, 48x25GbE + 12x100GbE, Cumulus Linux, P2C airflow
Specifications
Brand Name

NVIDIA
Product Type

Ethernet Switch
Product Family

Mellanox Switch,Spectrum,Spectrum-2 SN3000
Layer Supported

3
Media Type Supported

Optical Fiber
Expansion Slot Type

QSFP28
Manageable

Yes
Form Factor

Rack-mountable
Ethernet Technology

100 Gigabit Ethernet
Power Source

Power Supply
Frequently Asked Questions

Question:

What are the use cases for this switch?
[email protected]
16-Jul-2025

Answer:

The SN3420 switch is ideal for the ToR application.

Question:

Which network operating systems do these switches support?
[email protected]
12-Oct-2026

Answer:

Cumulus Linux and a SONiC build qualified for the SN3420 are the documented NOS choices. ONIE installs the selected image. An ordinary Linux distribution is not automatically a supported switch NOS with platform and ASIC drivers. Other NOS options may be available as the ecosystem evolves.

Question:

Can I run containerized network functions or custom applications on these switches with Cumulus Linux?
[email protected]
12-Oct-2026

Answer:

Cumulus Linux provides a Linux environment for supported containers and applications. Keep workloads within the switch control-plane CPU and memory limits. Check Docker/container support in the installed release; the switch is not a general-purpose server for heavy network functions.

Question:

How does Cumulus Linux integrate with network telemetry on these switches?
[email protected]
12-Oct-2026

Answer:

Cumulus Linux provides interface and system monitoring, with NVIDIA WJH packet-drop diagnostics on supported platforms and releases. Streaming telemetry and integration with NetQ or other monitoring tools depend on the installed software and feature configuration.

Question:

Can Cumulus Linux coexist with SONiC on the same switch model?
[email protected]
12-Oct-2026

Answer:

Cumulus Linux and SONiC switches can be used in the same network when the required protocols and feature behavior are interoperable. They are alternative operating systems on one switch, not two NOSes running simultaneously. Validate the particular topology and releases before deployment.

Question:

Can I run SONiC on these?
[email protected]
12-Oct-2026

Answer:

Yes, with a SONiC image qualified for the SN3420. This MSN3420-CB2FC ordering code includes Cumulus Linux; installing SONiC is a separate image choice through ONIE.
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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