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Silver 1U rackmount network switch with 48 SFP28 and 12 QSFP28 ports, dual power supplies, front-to-back airflow

Mellanox Technologies

Mellanox Technologies MSN3420-CB2RC network switch 48 SFP28 12 QSFP28 25GbE 100GbE

SKU CH-GQG6-DT6DM MPN MSN3420-CB2RC

A managed 1U rackmount switch with 48 SFP28 ports at 25GbE and 12 QSFP28 ports at 100GbE, dual AC power supplies and front-to-back airflow

  • FormatRackmount
  • Network Management TypeManaged
  • Primary Ports48 x QSFP28 + 12 x SFP28
  • Primary Port Speed100 Gbps
  • PowerFrequency: 50-60Hz Input range: 100-264Vac AC input current:
  • Dimensions1.72" (H) x17.24" (W) x 18.29" (D) 44mm (H) x 438mm (W) x 46
  • 48 SFP28 ports enable 25GbE server connectivity
  • 12 QSFP28 ports provide 100GbE uplink capacity
  • 8Tb/s total throughput supports high-density switching
  • 1U rackmount form factor fits standard cabinets
  • Dual AC power supplies with 100-264Vac input range

1U Open Ethernet Switch with Cumulus Linux

The Mellanox Technologies MSN3420-CB2RC is a 1U rackmount network switch built on the NVIDIA Spectrum-2 platform. It runs Cumulus Linux and delivers 48 SFP28 ports for 25GbE host connectivity plus 12 QSFP28 ports for 100GbE uplinks. Dual AC power supplies and an x86 CPU provide redundancy and processing headroom for data-center deployments.

Ideal for Top-of-Rack leaf-spine architectures

This switch suits operators migrating from 10G to 25G server links while using 100GbE spine connections in a single rack unit. The C2P airflow design matches standard cold-aisle installations. Buyers needing higher port density per rack unit or a different airflow direction should evaluate alternative form factors.

4.8Tb/s total throughput and 3.58Bpps processing

The Spectrum SN3420 ASIC provides up to 4.8Tb/s of switching capacity with a packet-processing rate of 3.58Bpps. This specification determines whether the switch can sustain line-rate traffic across all 60 ports under your workload profile.

Highlights

  • 48 SFP28 ports enable 25GbE server connectivity
  • 12 QSFP28 ports provide 100GbE uplink capacity
  • 8Tb/s total throughput supports high-density switching
  • 1U rackmount form factor fits standard cabinets
  • Dual AC power supplies with 100-264Vac input range

Specifications

BrandNVIDIA
SeriesSpectrum SN3000 Series
ModelSN3420
Part NumberMSN3420-CB2RC
FormatRackmount
Network Management TypeManaged
Primary Ports48 x QSFP28 + 12 x SFP28
Primary Port Speed100 Gbps
PowerFrequency: 50-60Hz
Input range: 100-264Vac
AC input current: 2.9-4.5A
Dimensions1.72" (H) x17.24" (W) x 18.29" (D)
44mm (H) x 438mm (W) x 464.6mm (D)
Weight8.5kg (18.73lb)
FeaturesSN3420 Series Switches
As data-center switching architectures increasingly adopt 100GbE, the SN3420 offers a high-performance, cost-effective way to evolve host connectivity from 10G to 25G. Equipped with 48 ports of 10/25GbE and 12 ports of up to 100GbE in a compact 1U form factor. The SN3420 is an ideal Top-of-Rack (ToR) network switch, delivering a total throughput of up to 4.8Tb/s with a processing capacity of 3.58Bpps. The SN3420 enables the seamless use of QSFP28 connections for leaf-spine topology and future-proofing the data center.
Visibility
NVIDIA What Just Happened (WJH)
Shipping weight12.70 kg
Package size711 × 610 × 102 mm

Questions about this item

Should I pick the 48 SFP28 ports or the 12 QSFP28 ports for my 25GbE server links?

Use the 48 SFP28 ports for 25GbE server connections; the 12 QSFP28 ports run at up to 100GbE for uplinks or leaf-spine links.

What does the 4.8Tb/s throughput figure mean when the switch is fully populated?

It is the aggregate non-blocking switching capacity across all 60 ports when every SFP28 runs at 25GbE and every QSFP28 at 100GbE.

What does the SFP28/QSFP28 interface cap at in practice?

SFP28 ports support 10GbE or 25GbE; QSFP28 ports support up to 100GbE per port.

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