Switch Series & Supported Models
Browse common switch series and models supported for each brand.
NVIDIA/Mellanox MSN3420-CB2F Mellanox Spectrum-2 Based 25GbE/100GbE 1U Open Ethernet Switch with Onyx, 48 SFP28 Ports and 12 QSFP28 Ports, 2 Power Supplies (AC), Standard Depth, P2C Airflow, Rail Kit
P/N: MSN3420-CB2F SKU: 10501
US$20,599.00
Switch Types:
- MSN3420-CB2F 48x 25GE SFP28 + 12x 100GE QSFP28,P2C,Onyx
- MSN3420-CB2FC 48x 25GE SFP28 + 12x 100GE QSFP28,P2C,Cumulus
- MSN3700-VS2F 32x 200GE QSFP56,P2C,Onyx
- MSN3700-VS2FC 32x 200GE QSFP56,P2C,Cumulus
- MSN3700-CS2F 32x 100GE QSFP28,P2C,Onyx
- MSN3700-CS2FC 32x 100GE QSFP28,P2C,Cumulus
Quantity:
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30-day return and refund
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3-year warranty
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Available for delivery within 2 days
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Free shipping for orders over
Products Highlight
- 48×25GbE Server-Facing SFP28 Ports
- 12×100GbE Leaf-Spine QSFP28 Uplinks
- 4.8Tb/s Wire-Speed Switching Capacity
- 3.58Bpps High-Rate Packet Processing
- 100G Breakout Without Port Blocking
- Onyx-Powered Automation and Telemetry
Specifications
| Part Number | MSN3420-CB2F | Switch ASIC | NVIDIA Spectrum-2 |
|---|---|---|---|
| Form Factor | 1U | Switching Capacity | 4.8Tbps |
| Ports | 48 x SFP28 + 12 x QSFP28 | Port Speed | 25GE / 100GE |
| Software | NVIDIA Onyx | Airflow | Power-to-Connector (P2C) |
| Cooling Mechanism | Air Cooled | Input Voltage | 100–127VAC, 50/60Hz, 6A / 200–240VAC, 50/60Hz, 3A |
| Dimensions (H × W × D) | 44 × 438 × 464.6mm | Warranty | 1-Year / 3-Year / 5-Year Support Options Available |
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FAQ
Ask a QuestionFind answers to common questions about our products.
Most of our servers are still running at 10GbE. Do we need to upgrade every NIC to 25GbE before deploying this switch?
No. The SN3420 provides 48 SFP28 downlink ports that can operate at 10GbE or 25GbE. Existing 10GbE hosts can remain in service while server NICs are upgraded to 25GbE over time.
Does a 48×25GbE server-facing design with 12×100GbE uplinks provide a true 1:1 fabric?
Yes. With all 48 downlinks operating at 25GbE and all 12 QSFP28 uplinks operating at 100GbE, both the host-facing and uplink bandwidth total 1.2Tbps. This is a practical design for racks where avoiding ToR uplink contention is important. Recalculate the ratio if any 100GbE ports are reserved or repurposed for breakout connections.
Can unused 100GbE QSFP28 uplinks be converted into additional 25GbE server-facing ports?
Yes. All 12 QSFP28 ports can be broken out into 4×25GbE connections, allowing up to 96 logical 25GbE interfaces on the platform. They can also operate as 2×50GbE links. Unlike some other switch designs, QSFP28 breakout on the SN3420 does not block adjacent ports. Once a port is broken out, however, it is no longer available as one independent 100GbE uplink.
Can I connect a single 10GbE or 25GbE device to an unused 100GbE QSFP28 port?
Yes. A QSFP-to-SFP adapter, or QSA, can convert a QSFP28 port into one individual SFP interface. This is useful for a small number of standalone 10GbE or 25GbE connections. The port speed must be configured manually in Onyx, and the same port should not also be configured as a breakout interface.
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