NVIDIA Mellanox MSN2100-CB2RC Spectrum-Based 100GbE Open Ethernet Switch with Cumulus Linux: This is a 1U short-depth top-of-rack Ethernet switch with 16 QSFP28 ports, factory pre-loaded with Cumulus Linux. NVIDIA part number 920-9N100-00R7-0C0. This is the Cumulus-loaded SKU, not the ONIE-only MSN2100-CB2R or the Onyx-loaded MSN2100-CB2RO. This is a refurbished unit, fully tested.
Engineering Context
The MSN2100-CB2RC uses the Mellanox Spectrum ASIC and delivers 3.2 Tb/s non-blocking switching across 16 QSFP28 ports at 100GbE per port. Each QSFP28 port supports 2x50GbE or 4x25GbE / 4x10GbE breakouts, providing up to 64 SFP-equivalent ports of 25GbE in a single 1U chassis. The unit ships with C2P (Connector-to-Power) airflow, dual hot-swappable AC power supplies, and an Intel Atom (Rangeley) control-plane CPU.
Deployment & Use Cases
Suited for top-of-rack and short-depth cabinets, leaf positions in 100GbE spine-leaf fabrics, micro-data-centers, telco edge / MEC, and HPC / AI cluster aggregation. Cumulus Linux brings native Linux networking, NetQ telemetry, FRR (BGP / OSPF), VXLAN EVPN, MLAG via clag, and full automation hooks via Ansible, NAPALM, and Salt.
Technical Specifications
Switching ASIC: Mellanox Spectrum (SN2000 family)
Throughput: 3.2 Tb/s non-blocking
Port-to-port latency: ~300 ns (cut-through)
Ports: 16x QSFP28 at 100GbE per port
Breakout: 2x50GbE or 4x25GbE / 4x10GbE per port (up to 64 SFP-equivalent)
Form factor: 1U, short depth
Airflow: C2P (Connector-to-Power)
Power supplies: 2x hot-swappable AC, redundant
Control CPU: Intel Atom (Rangeley)
Pre-loaded OS: Cumulus Linux
NVIDIA P/N: 920-9N100-00R7-0C0
Compatibility & Constraints
Pairs with NVIDIA Mellanox QSFP28 100GbE optics, DACs (MCP1600 series), AOCs (MFA1A00 series), and 4x25GbE breakout cables (MCP7H00 series). Operates with ConnectX-4 / -5 / -6 adapters end-host. The 'RC' suffix denotes Cumulus Linux pre-loaded; if Onyx is required pick MSN2100-CB2RO, and for ONIE-only / bring-your-own-OS pick MSN2100-CB2R. A current Cumulus subscription is required for production use beyond the trial entitlement; verify license terms with NVIDIA before deployment. Rail kit is sold separately. Power redundancy requires both PSUs populated on independent feeds.
Frequently Asked Questions (FAQ)
Q. What is the Data Rate of the MSN2100-CB2RC?
The data rate of the MSN2100-CB2RC is 100GbE.
Q. Is the MSN2100-CB2RC supplied new or refurbished, and who supplies it?
The MSN2100-CB2RC is supplied refurbished by T.E.S IT-SOLUTIONS, lab-tested before dispatch and shipped from EU stock with 1-3 business day handling. Full listing and current pricing at tes-itsolutions.com.

Why TES
T.E.S IT-SOLUTIONS ships this switch professionally refurbished and tested, with port diagnostics and firmware verified. Handling time is 1–3 business days; worldwide shipping is available. For multi-unit pricing, integration support, or compatibility questions, contact us before ordering.