NVIDIA Mellanox MSN2700-CS2RO Spectrum-Based 100GbE 1U Open Ethernet Switch, 32x QSFP28, C2P Airflow, ONIE-Only: This is a Spectrum-1 based 1U fixed-configuration top-of-rack Ethernet switch with 32 QSFP28 ports supporting 10/25/40/50/100GbE. The 'R' suffix denotes C2P (connector-to-power) reverse airflow direction, and the 'O' suffix denotes an ONIE-only SKU — the unit ships without a pre-installed network operating system. This is a refurbished unit.
Engineering Context
The MSN2700 is built on the NVIDIA Spectrum-1 ASIC and delivers 6.4 Tbps of full-duplex non-blocking switching capacity with 4.76 Bpps Layer 2 forwarding rate and approximately 300ns port-to-port latency. All 32 QSFP28 ports support breakout to 4x 25GbE, yielding up to 128 effective 25GbE downlinks per chassis. The switch implements RDMA over Converged Ethernet (RoCE v2) with hardware-based congestion control and supports VXLAN, EVPN, and MLAG once a network OS is installed. C2P airflow draws cool aisle air from the PSU/CPU side and exhausts at the port side — the reverse of the more common P2C front-to-back direction. Dual hot-swap AC PSUs (1+1 redundant) and N+1 hot-swap fan trays.
Deployment & Use Cases
100GbE spine and leaf in operator-built SONiC, Cumulus Linux, or Onyx fabrics where the OS is provisioned via ONIE during commissioning. Storage-fabric switching for NVMe-oF/RoCE clusters and Ceph backends. Cloud and HPC compute pods with 25GbE breakout to ConnectX adapters. Tenant racks where C2P airflow matches a reverse hot-aisle/cold-aisle layout. Disaggregated networking proof-of-concepts and labs.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MSN2700-CS2RO
ASIC: NVIDIA Spectrum-1
Form Factor: 1U fixed-configuration
Ports: 32x QSFP28 (10/25/40/50/100GbE)
Switching Capacity: 6.4 Tbps full-duplex
Forwarding Rate: 4.76 Bpps
Port-to-Port Latency: ~300ns
Breakout: 4x 25GbE per QSFP28 (up to 128 total 25GbE)
CPU: x86 (Intel)
PSUs: 2x AC, hot-swap, 1+1 redundant
Airflow: C2P (connector-to-power, reverse)
Operating System: ONIE-only (Onyx, Cumulus Linux, SONiC sold/installed separately)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA ConnectX-4, ConnectX-5, ConnectX-6 Dx and Bluefield DPUs at 10/25/40/100GbE Ethernet, plus standard third-party QSFP28 transceivers and DACs/AOCs. The 'O' SKU ships without a pre-installed OS — Onyx, Cumulus Linux, or SONiC must be installed via ONIE before production deployment. C2P airflow is the reverse of the more common P2C; do not mix with P2C-airflow equipment in the same row without isolating airflow paths. Not an InfiniBand switch — Ethernet only. Rail kit not included; order separately.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS power-tests and port-validates every switch before shipment, including PSU redundancy and fan health. We provide expert consultation on Spectrum-based fabric design, ONIE-OS provisioning, and global shipping with 1–3 day handling. Visit tes-itsolutions.com for the full inventory.