NVIDIA Mellanox MSN3420-CB2F 1U Open Ethernet Switch: This is a 1U fixed-configuration Spectrum-2-based Ethernet switch with 48 × SFP28 ports for 25GbE access and 12 × QSFP28 ports for 100GbE uplinks (NVIDIA P/N 920-9N213-00F7-0X0). The CB2F suffix denotes the dual AC PSU configuration with P2C (Power-to-Connector, forward) airflow. This is a brand-new unit.
Engineering Context
The MSN3420-CB2F is built on the Mellanox Spectrum-2 ASIC. Aggregate non-blocking bandwidth across the 48 × 25GbE access ports and 12 × 100GbE uplinks reaches 3.6Tb/s. Each QSFP28 uplink can be configured as 4 × 25GbE breakout for additional access capacity. The switch supports ONIE for installation of Mellanox Onyx, Cumulus Linux, or SONiC, and provides hardware acceleration for VXLAN, RoCEv2, and telemetry. P2C airflow uses the standard hot-aisle/cold-aisle data center orientation.
Deployment & Use Cases
Top-of-Rack 25GbE access for ConnectX-4 Lx / ConnectX-5 / ConnectX-6 server adapters with 100GbE leaf-spine uplinks. AI/ML cluster fabrics combining GPU compute nodes (25G NICs) with high-bandwidth NVMe-oF storage tier. Cloud and multi-tenant data centers requiring per-tenant VXLAN segmentation. Financial trading and CDN edge environments needing low-latency 25G access.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSN3420-CB2F
NVIDIA P/N: 920-9N213-00F7-0X0
ASIC: Mellanox Spectrum-2
Access Ports: 48 × SFP28 (25GbE)
Uplink Ports: 12 × QSFP28 (100GbE)
Form Factor: 1U rackmount
CPU: x86 control processor
Power Supplies: Dual AC, hot-swappable
Airflow: P2C (Power-to-Connector, forward)
OS Support: Mellanox Onyx, Cumulus Linux, SONiC (ONIE-bootable)
Condition: New — Sealed by T.E.S IT-SOLUTIONS
Compatibility & Constraints
SFP28 ports accept 25GbE DACs, AOCs, and SR/LR transceivers. QSFP28 uplinks accept 100GbE DACs, AOCs, and SR4/LR4 optics. Compatible with ConnectX-4 Lx, ConnectX-5, ConnectX-6 Dx, and ConnectX-7 adapters at 25GbE. This is an Ethernet-only platform — does not run InfiniBand. Forward (P2C) airflow only — verify rack orientation before deployment. Rail kit is not included.
Why TES
T.E.S IT-SOLUTIONS supplies factory-new and certified refurbished NVIDIA Mellanox switching with full pre-shipment validation. T.E.S IT-SOLUTIONS ships globally with 1–3 day handling and provides expert AI/ML and cloud-fabric deployment consultation.