NVIDIA Mellanox MSN4600-CS2FO Spectrum-3 100GbE Open Ethernet Switch, 64x QSFP28, 2U, ONIE: This is a 2U fixed-configuration leaf/spine Ethernet switch built on the NVIDIA Spectrum-3 ASIC, providing 64 QSFP28 ports for 100GbE and shipped with ONIE only — no preinstalled network operating system (OEM P/N: 920-9N302-00F7-0N0). It is intended for customers who will install Cumulus Linux, SONiC, or another ONIE-compatible NOS themselves. It is not a switch shipped with Cumulus Linux preloaded, nor with NVIDIA Onyx. This is a refurbished unit.
Engineering Context
The MSN4600-CS2FO provides 6.4 Tb/s of switching capacity and a 4.7 Bpps forwarding rate. The Spectrum-3 ASIC supports flexible per-port configuration: each QSFP28 port can be set to 1x100GbE, 1x50GbE, 1x40GbE, 2x50GbE, or broken out to 4x25GbE/4x10GbE. ONIE (Open Network Install Environment) lets the operator load any compatible NOS over the network, supporting standardized provisioning across heterogeneous fleets. Airflow is P2C (port-to-power, front-to-back). Switching latency is in the sub-microsecond range typical of Spectrum-3 cut-through forwarding.
Deployment & Use Cases
Customer-loaded SONiC deployments at hyperscale or in modern AI/ML clusters. Bring-your-own Cumulus Linux installs where the customer manages OS imaging from a central provisioning server. Lab and validation environments needing repeatable bare-metal switch reimaging. EVPN-VXLAN overlays. 100GbE leaf/spine fabrics where the NOS is standardized through ZTP (Zero-Touch Provisioning).
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MSN4600-CS2FO
OEM P/N: 920-9N302-00F7-0N0
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: ONIE only — no preinstalled NOS
Airflow: P2C (port-to-power, front-to-back)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
ONIE supports installation of Cumulus Linux, SONiC and other ONIE-compatible NOS images — verify your chosen NOS lists Spectrum-3 / MSN4600 as a supported platform before purchase. Compatible with NVIDIA Mellanox QSFP28 optics, AOCs and DACs and with QSFP28-to-4xSFP28 breakout cables. Pairs with NVIDIA ConnectX-4/5/6 adapters in 100GbE Ethernet mode. P2C airflow only — do not mix with C2P units in the same rack column. This unit ships WITHOUT a preinstalled NOS; budget time for image installation and licensing. For preloaded Cumulus, see MSN4600-CS2FC; for Onyx, see MSN4600-CS2F.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS power-tests every switch, verifies ONIE boot, validates port operation and confirms airflow direction before shipment. Standard handling is 1–3 business days from confirmed order, with global shipping and expert advice on SONiC, Cumulus and Spectrum-3 deployment. See our product page for purchasing details.