HPE Mellanox 834977-B22 EDR v2 36-Port QSFP28 InfiniBand Switch

• Brand: HPE 
• HPE Part Number: 834977-B22
• Product Family: Mellanox InfiniBand EDR Switch Series
• Product Description: Mellanox InfiniBand EDR 100 Gb/sec v2 36-port Connector-Side-Inlet Airflow (RAF) Unmanaged Switch
• Switch Technology: Mellanox Switch-IB 2
• Switch Type: Unmanaged
• InfiniBand Generation: EDR
• Per-Port Speed: 100 Gb/s bidirectional
• Data Ports: 36 × QSFP28
• Switching Capacity: Up to 7 Tbps
• Port-to-Port Latency: 90 ns
• Multicast Table: 16,384 entries
• Virtual Lanes: 1–8 VLs plus 1 management VL
• Maximum MTU: Up to 4 KB
• Port Mirroring: Yes
• QSFP28 Cabling: Passive copper and active optical cables supported
• Power Supplies: 2
• PSU Redundancy: 1+1 redundant
• PSU Serviceability: Hot-swappable
• Fan Units: 4
• Fan Redundancy: N+1
• Fan Serviceability: Hot-swappable
• Dimensions: 1.72 × 16.84 × 27 in (H × W × D)
• Dimensions, Metric: 4.37 × 42.77 × 68.58 cm
• Operating Temperature: 0°C to 45°C
• Non-Operating Temperature: -40°C to 70°C
• Operating Humidity: 5% to 95%
• Operating Altitude: -60 to 3,200 m
• Frequency: 50/60 Hz
• Input Voltage: 100–240 VAC
• Typical Power with Passive Cables: 122.32 W
• Maximum Power with Optical Cables: 332 W

Why Choose This Product?

• 36-port EDR density: Provides a substantial number of 100 Gb/s-class InfiniBand connections from a single switching platform, helping reduce rack-space consumption.
• 7 Tbps switching capacity: Gives HPC architects significant aggregate fabric capacity for compute-intensive and data-heavy workloads. 
• 90 ns latency: Supports applications where low network switching latency directly affects workload efficiency. 
• Redundant hot-swappable PSUs: Helps improve power resilience while reducing maintenance disruption. 
• N+1 hot-swappable cooling: Adds fan-level redundancy and serviceability for production data-center environments. 
• RAF airflow configuration: Makes the model particularly relevant where connector-side-inlet airflow is required by the rack's cooling architecture. 
• Passive and active optical cable support: Gives infrastructure teams cabling options for supported deployment requirements. 
• HPE-specific part number: Using 834977-B22 helps procurement teams distinguish this RAF unmanaged EDR v2 model from related HPE/Mellanox variants such as 834976-B22 and the internally managed 834978-B22/834979-B22 models.