NVIDIA Mellanox MSN2010-CB2RC Spectrum 25GbE/100GbE Open Ethernet Switch, 18x SFP28 + 4x QSFP28, 1U Half-Width, Cumulus Linux, C2P Airflow: This is a half-width 1U Top-of-Rack Ethernet switch built on the NVIDIA Spectrum (first-generation) ASIC, providing 18 SFP28 ports for 25GbE plus 4 QSFP28 ports for 100GbE with Cumulus Linux preinstalled and C2P (power-to-port, "reverse") airflow. It is the reverse-airflow Cumulus variant — it is not the standard P2C MSN2010-CB2FC nor the ONIE-only MSN2010-CB2FO. This is a refurbished unit.
Engineering Context
The MSN2010-CB2RC provides 1.7 Tb/s of switching capacity and a 1.275 Bpps forwarding rate. C2P airflow draws cool air from the power-supply side and exhausts at the port side — this is required when the switch is mounted with its ports facing the hot aisle, or in racks designed for reverse airflow management. The 4x QSFP28 100GbE ports also accept 4x25GbE breakout, giving up to 34x 25GbE total when fully broken out. The half-width 1U chassis allows two switches side by side in a single rack U for dual-ToR designs.
Deployment & Use Cases
Reverse-airflow racks where the cabling face must point into the hot aisle. Half-width dual-ToR designs in edge, telco and hyperconverged racks running Cumulus Linux. Storage-node Top-of-Rack switching for 25GbE NVMe-oF or RoCE. EVPN-VXLAN small-fabric overlays managed from Cumulus + NetQ. Drop-in replacement for end-of-life Spectrum reverse-airflow ToR switches in existing fabrics.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MSN2010-CB2RC
ASIC: NVIDIA Spectrum (first generation)
Form Factor: 1U Half-Width Rackmount
Ports: 18x SFP28 + 4x QSFP28
Speeds: 1/10/25GbE on SFP28; 40/100GbE on QSFP28
Switching Capacity: 1.7 Tb/s
Forwarding Rate: 1.275 Bpps
Operating System: NVIDIA Cumulus Linux (preinstalled)
Airflow: C2P (power-to-port, reverse)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with SFP28 25GbE optics and DACs and with QSFP28 100GbE optics, AOCs and DACs (e.g., MMA1B00, MFA1A00, MCP1600-Cxx series). Compatible with QSFP28-to-4xSFP28 breakout cables. Pairs with NVIDIA ConnectX-4 Lx, ConnectX-5 and ConnectX-6 Ethernet adapters. C2P (reverse) airflow is required — do NOT install this unit in a rack designed for P2C airflow without changing fan-and-PSU modules. For P2C airflow with Cumulus see MSN2010-CB2FC; for ONIE-only see MSN2010-CB2FO; for Onyx see the MSN2010-CB2F variants.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS power-tests every switch, validates the Cumulus Linux boot, confirms port operation and verifies C2P airflow direction before shipment. Standard handling is 1–3 business days from confirmed order, with global shipping and consultative help on Cumulus Linux fabric design. See our product page for purchasing details.