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.
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.