Detailed Specifications
HPE R3B05A SN2745M 100GbE 32-Port QSFP28 Switch
Overview
The HPE R3B05A is a 1U rack-mount Ethernet switch offering 32 QSFP28 ports capable of 100 Gb/s each, ideal for modern data-centre leaf/spine, storage fabric or compute-cluster environments. It provides full-line-rate forwarding across all ports with non-blocking architecture and supports flexible port speeds including 100GbE, 50GbE, 40GbE or multiple 25/10GbE via breakout on each QSFP28, enabling future-proof network expansion. The unit is optimized for high-density, low-latency environments, supporting large east-west traffic flows typical of cloud-scale, HPC or storage-rich infrastructures. With open-networking support through ONIE and optional Onyx OS, it integrates into both traditional and disaggregated network fabrics. The airflow is "power-to-connector" and the unit is designed for installation in high-density rack environments where cooling direction, power supply architecture and space usage are critical.
Key Features
32 × 100 Gb/s QSFP28 ports for ultra-high-density uplinks
Supports breakout configurations to 50/40/25/10 Gb/s from each QSFP28
Non-blocking switching fabric delivering 6.4 Tb/s aggregate bandwidth
Open-networking ready (ONIE/Onyx) and power-to-connector airflow design
Technical Specifications
| Specification | Value |
|---|
| Brand | HPE |
| Part Number | R3B05A |
| Product Type | SN2745M 100 GbE 32-Port QSFP28 Switch |
| Port Count | 32 |
| Port Type | QSFP28 |
| Maximum Link Speed per Port | Up to 100 Gb/s |
| Aggregate Switching Bandwidth | 6.4 Tb/s |
| Form Factor | 1U Rack-mount |
| Airflow Direction | Power-to-Connector (front-to-back) |
| Host OS/Software Support | ONIE + Optional Onyx OS |
| Typical Weight | ~10 lb (≈4.5 kg) |
| Typical Depth | Short-depth rack capable (approx. 18″-20″) |
| Redundant Fans/PSU Support | Yes (hot-swap fans, redundant DC supply) |
| Use Case | Top-of-rack/leaf/spine in high-density fabrics |
| Ethernet Standards Supported | 10/25/40/50/100 GbE |
