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

NVIDIA

NVIDIA MSN3420-CB2FC SN3420 network switch 48 SFP28 12 QSFP28 2.4 Tb/s 2 PSU

SKU CH-RRBR-ZXCY3 MPN MSN3420-CB2FC

A 1U Ethernet switch with 48 SFP28 and 12 QSFP28 ports delivering 2.4 Tb/s throughput and 3.58 Bpps wire-speed forwarding

  • Primary Ports48 x SFP28 + 12 x QSFP28
  • Packet Forwarding RatePacket buffer: 42 MB
  • PowerPower supplies Frequency: 50-60 Hz Input range: 100-264 Vac
  • Dimensions1.72" (H) x 17.24" (W) x 18.29" (D) 44 mm (H) x 438 mm (W) x
  • Weight8.5 kg (18.73 lb)
  • FeaturesMax. 100GbE ports: 12 Max. 50GbE ports: 24 Max. 40GbE ports:
  • High-density 25GbE connectivity with 48 SFP28 ports
  • Twelve 100GbE QSFP28 uplinks for high-capacity aggregation
  • 4 Tb/s switching capacity supports line-rate traffic
  • Dual hot-swap AC power supplies provide 1+1 redundancy
  • Compact 1U design fits standard rack deployments

Port Configuration

The NVIDIA SN3420 is a 1U open Ethernet switch built on the Spectrum-2 platform. It provides 48 SFP28 ports and 12 QSFP28 ports for high-density 25GbE and 100GbE connectivity. The switch runs Cumulus Linux on a dual-core x86 CPU with 8 GB system memory and 32 GB SSD storage.

Suitable Deployments

This switch suits data-centre racks needing wire-speed 25GbE to servers and 100GbE uplinks with 2.4 Tb/s total throughput. It is not for environments that require Power over Ethernet on the front-panel ports. It is not for teams that need a proprietary operating system instead of an open Linux base.

Switching Capacity

The fabric delivers 2.4 Tb/s switching capacity with a 3.58 Bpps packet forwarding rate and a 42 MB packet buffer. Dual hot-swap AC power supplies and five N+1 redundant fans support continuous operation in forward or reverse airflow configurations.

Highlights

  • High-density 25GbE connectivity with 48 SFP28 ports
  • Twelve 100GbE QSFP28 uplinks for high-capacity aggregation
  • 4 Tb/s switching capacity supports line-rate traffic
  • Dual hot-swap AC power supplies provide 1+1 redundancy
  • Compact 1U design fits standard rack deployments

Specifications

BrandNVIDIA
SeriesSN3000 Series
ModelSN3420
Part NumberNVIDIA SKU: 920-9N213-00F7-0C0
Legacy OPN: MSN3420-CB2FC
Primary Ports48 x SFP28 + 12 x QSFP28
Packet Forwarding RatePacket buffer: 42 MB
PowerPower supplies Frequency: 50-60 Hz
Input range: 100-264 Vac
AC input current: 2.9-4.5 A
Dimensions1.72" (H) x 17.24" (W) x 18.29" (D)
44 mm (H) x 438 mm (W) x 464.6 mm (D)
Weight8.5 kg (18.73 lb)
FeaturesMax. 100GbE ports: 12
Max. 50GbE ports: 24
Max. 40GbE ports: 12
Max. 25GbE ports: 48+48
Max. 10GbE ports: 48+48
Max. 1GbE ports: 48+48
Switching capacity (Tb/s): 2.4 Tb/s
Wire-speed switching (Bpps): 3.58 Bpps
Lanes per port x max speed per lane: 4x 25G NRZ
CPU Dual-core: x86
System memory: 8 GB
SSD memory: 32 GB
Packet buffer: 42 MB
100/1,000Mb/s management ports: 1
Serial ports: 1 RJ45
USB ports: 1
Hot-swap power supplies: 2 (1+1 redundant)
Hot-swappable fans: 5 (N+1 redundant)
Airflow options: Forward or reverse
Shipping weight12.25 kg
Package size699 × 676 × 97 mm

Questions about this item

How much AC current does the MSN3420-CB2FC draw when both power supplies run continuously at full load?

The dual hot-swap supplies each accept 100-264 Vac at 50-60 Hz and draw between 2.9 A and 4.5 A depending on input voltage, so a fully loaded chassis can pull up to roughly 9 A at the low-voltage end.

Which transceivers and cables must I already have to populate the 48 SFP28 and 12 QSFP28 ports on this switch?

You need SFP28 modules or direct-attach cables for 10 GbE or 25 GbE links on the 48 small-form-factor ports, and QSFP28 modules or cables for 40 GbE, 50 GbE or 100 GbE links on the 12 large-form-factor ports.

Can the SN3420 forward traffic at line rate to legacy 1 GbE and 10 GbE servers that only have SFP+ or RJ45 optics?

Yes — the 48 SFP28 ports auto-negotiate down to 1 GbE and 10 GbE, and the 12 QSFP28 ports support 40 GbE breakout cables, so existing copper or fibre links integrate without media converters.

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