NVIDIA Mellanox MSN2420-CB2R Spectrum 1U Open Ethernet Switch — 48× SFP28 25GbE + 6× QSFP28 100GbE, Baidu OS: This is a 1U short-depth Spectrum-based Open Ethernet top-of-rack switch with Baidu OS preinstalled. NVIDIA P/N: 920-9N111-B7R7-0B0. This IS a hyperscale-style 25G access / 100G uplink platform. This is NOT a Cumulus Linux or SONiC system out of the box — Baidu OS is a customized Linux NOS specific to Baidu's cloud fleet. This is a refurbished unit, tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MSN2420-CB2R combines 48 SFP28 access ports with 6 QSFP28 uplinks in a single 1U short-depth chassis, giving an aggregate front-panel capacity of 1.8 Tb/s (1,200 Gb/s of 25G access + 600 Gb/s of 100G uplinks). The platform uses NVIDIA Spectrum silicon, dual hot-swappable AC power supplies for 1+1 redundancy, and an x86 dual-core management CPU. Airflow is C2P (connector-to-power, front-to-back). The chassis is RoHS6 compliant and designed for short-depth racks where standard 1U gear will not fit.
Deployment & Use Cases
Top-of-rack 25GbE access for compute or storage servers with 100GbE uplinks to a spine. Edge and co-location racks with constrained depth. Telco and cloud operator aggregation. Baidu cloud and Baidu-OS-aligned hyperscale fleets where the Baidu NOS is the standard image.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MSN2420-CB2R
NVIDIA P/N: 920-9N111-B7R7-0B0
Switch Family: Spectrum (SN2000 series)
Ports: 48× SFP28 (25GbE) + 6× QSFP28 (100GbE)
Front-Panel Capacity: 1.8 Tb/s aggregate
Form Factor: 1U short-depth rackmount
Operating System: Baidu OS (preinstalled)
Airflow: C2P (front-to-back)
Power Supplies: 2× AC hot-swappable (1+1 redundant)
Management CPU: x86 dual-core
Compliance: RoHS6
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
The 48 SFP28 ports accept 25GbE and 10GbE optics and DACs. The 6 QSFP28 ports accept 100GbE optics and DACs (including breakout to 4× 25GbE on supported NOS configurations). This unit ships with Baidu OS — replacing or reflashing the NOS to Cumulus Linux, SONiC, or another image requires technical expertise and is not guaranteed by NVIDIA. Airflow is fixed C2P; this SKU is not the reverse-airflow (P2C) variant and must be deployed in a hot-aisle/cold-aisle layout that matches front-to-back cooling. The QSFP28 cages do not support QSFP56 (200GbE) or QSFP-DD (400GbE) modules.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every port, validates PSU redundancy and fan health, confirms airflow direction, and verifies the unit boots to a Baidu OS login prompt before shipment. Handling time is 1–3 business days, with global shipping and engineer-led integration support.