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Silver 1U rackmount switch with 32 QSFP28 ports on the front panel

Mellanox Technologies

Mellanox MSN3700-CS2FO Spectrum-2 100GbE 32-port network switch

SKU CH-3GA3-3P7NJ

A 1U rack-mount switch with 32 QSFP28 ports at 100 Gbps, splittable to 128 ports at 10 or 25 Gbps for spine or leaf deployment

  • Product formatRackmount
  • Main ports32 x QSFP28
  • Main port speed100 Gbit/s
  • Key featuresSN3700C Series Switches The SN3700C is a 1U 32-port 100GbE O
  • 32 QSFP28 ports deliver 100 Gbps each for high-density spine connectivity
  • Splits each port into 4 x 25 GbE links for flexible leaf deployments
  • 1U rackmount form factor fits dense data-centre racks
  • 512K on-chip flow counters enable fine-grained traffic visibility
  • Open Ethernet design supports multiple network operating systems

32-port 100 GbE Open Ethernet Switch

The Mellanox MSN3700-CS2FO is a 1U rackmount switch with 32 QSFP28 ports running at 100 Gbps. It belongs to the SN3700C series and operates as an open Ethernet platform for spine or leaf deployments.

Suits spine or leaf roles with flexible port speeds

The switch supports speeds from 1 GbE to 100 GbE and ports can be split to 128 x 10/25 GbE using splitter cables. Buyers who need fixed 100 GbE only without split capability, or who require proprietary OS lock-in, should look elsewhere.

32 QSFP28 ports at 100 Gbps with full splittability

Each of the 32 ports can be divided into four 25 GbE or 10 GbE lanes, delivering up to 128 lower-speed ports. This port density and splittability determine whether the switch fits the rack connectivity plan.

How it compares

Measured against everything we stock in Ethernet & PoE Switches, at today’s prices. Recalculated every night.

Price $6,408.99
Pricier than about 90% of the 2,759 comparable items (median $482.99).

Specifications

Product
Brand nameMellanox
Model nameMSN3700-CS2FO
Connectivity
Main port speed100 Gbit/s
Ports & slots
Main ports32 x QSFP28
More details
Product formatRackmount

Questions about this item

Will the MSN3700-CS2FO connect to my existing 10 GbE and 25 GbE servers using the 32 QSFP28 ports?

Yes, each of the 32 QSFP28 ports can be split with splitter cables into four 10 GbE or 25 GbE links, giving up to 128 lower-speed ports for legacy servers.

How can I verify the switch is forwarding traffic correctly after installation?

The SN3700C series includes NVIDIA What Just Happened telemetry and inband network telemetry-ready hardware that stream per-flow diagnostics and queue-depth histograms so you can confirm normal operation.

What accessories come in the box and what must I source separately for a 100 GbE spine deployment?

The unit ships as a 1U rackmount open Ethernet switch; you must purchase QSFP28 transceivers or direct-attach cables and any splitter cables separately to populate the 32 ports at 100 Gbps.

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