NVIDIA Mellanox MSN4600-CS2FC Spectrum-3 100GbE Open Ethernet Switch, 64x QSFP28, 2U, Cumulus Linux: This is a 2U fixed-configuration leaf/spine Ethernet switch built on the NVIDIA Spectrum-3 ASIC, providing 64 QSFP28 ports for 100GbE with Cumulus Linux preinstalled (OEM P/N: 920-9N302-00F7-0C2). It is an Open Ethernet platform shipped for Cumulus Linux deployments — it is not a switch shipped with NVIDIA Onyx, nor an ONIE-only blank unit. This is a refurbished unit.
Engineering Context
The MSN4600-CS2FC delivers up to 6.4 Tb/s of switching capacity with a 4.7 Bpps forwarding rate. The Spectrum-3 ASIC enables flexible per-port configuration: each QSFP28 port supports 1x100GbE, 1x50GbE, 1x40GbE, 2x50GbE, or breakout to 4x25GbE/4x10GbE for high-density leaf and ToR designs. Airflow is P2C (port-to-power, front-to-back), pulling cool air from the port side and exhausting at the power-supply side — match this to your cold-aisle/hot-aisle layout. Switching latency is in the sub-microsecond range typical of Spectrum-3 cut-through forwarding.
Deployment & Use Cases
Leaf or spine switching in 100GbE Cumulus Linux fabrics. Top-of-Rack aggregation for 25GbE servers using 4x25G QSFP28 breakout cables. EVPN-VXLAN overlays in multi-tenant cloud environments. Cumulus Linux plus NetQ telemetry deployments. AI/ML training cluster Ethernet fabrics where Cumulus is the standardized NOS. High-density storage fabrics (NVMe-oF, RoCEv2) requiring predictable low latency.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MSN4600-CS2FC
OEM P/N: 920-9N302-00F7-0C2
ASIC: NVIDIA Spectrum-3
Form Factor: 2U Rackmount
Ports: 64x QSFP28
Switching Capacity: 6.4 Tb/s
Forwarding Rate: 4.7 Bpps
Port Speeds: 1/10/25/40/50/100GbE
Operating System: NVIDIA Cumulus Linux (preinstalled)
Airflow: P2C (port-to-power, front-to-back)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Mellanox QSFP28 100GbE optics, AOCs and DACs (MMA1B00, MFA1A00, MCP1600-Cxx series) and with QSFP28-to-4xSFP28 breakout cables for 25GbE ToR builds. Pairs naturally with NVIDIA ConnectX-4, ConnectX-5 and ConnectX-6 Ethernet adapters and Spectrum/Spectrum-2/Spectrum-3 fabrics. P2C airflow is required — do not deploy in racks plumbed for C2P (reverse) airflow without changing the fan-and-PSU module set. This unit does NOT preinstall NVIDIA Onyx; for Onyx, choose MSN4600-CS2F. It is NOT a 200G/400G platform — for those speeds, see the SN4000 series.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS power-tests every switch, validates port counts and link integrity, and confirms airflow direction before shipment. Standard handling is 1–3 business days from confirmed order, with global shipping and consultative help on Cumulus Linux and Spectrum-3 fabric design. See our product page for purchasing details.