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High performance InfiniBand switch for HPC workloads.
834977-B22
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Mellanox IB EDR v2 36p RAF Switch
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834977-B22
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- Mellanox IB EDR v2 36p RAF Switch
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834977-B22 Overview
834977-B22 is a high-performance network switch built on a robust, modular architecture that delivers exceptional scalability and reliability for modern data environments. Engineered with advanced stacking capabilities, it supports a combination of AC power and redundant power supply options, ensuring continuous operation even during power fluctuations.
Designed for enterprise-grade deployments, the 834977-B22 provides versatile port configurations including multiple Ethernet and SFP uplink ports for both copper and fiber connectivity. Its high throughput and optimized switching performance make it ideal for mission-critical applications, data centers, and campus networks where scalability and robust connectivity are paramount.
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834977-B22 Specifications
- Product Type
- Switch
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Flash Memory
- 64 MB
- Power Source
- Redundant Power Supply / AC Power Supply
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Width
- 17.5 inches
- IOS
- IP Services
- Switching Capacity
- 128 Gbps
- Height
- 1.75 inches
- POE Support
- POE+
- Uplink Configuration
- 10G
- Depth
- 12 inches
- Switching Capacity with Stacking
- 256 Gbps
- Weight
- 15 lbs
- Power Consumption
- 75 W
- Port/Expansion Slot Details
- 24 Ethernet ports with 4 SFP uplink slots
- Manufacturer Part Number
- 834977-B22
- Product Name
- 834977-B22 Stackable Gigabit Ethernet Switch
834977-B22 Use Case
High-Performance Computing Cluster Interconnect
In a national research center deploying a 512-node HPC cluster, the 834977-B22 Mellanox IB EDR v2 36p RAF Switch delivers 100 Gb/s RDMA and sub-700 ns latency for MPI workloads. This low-latency fabric reduces job completion times by up to 30 %, enables linear scalability across thousands of CPU cores, and maximizes utilization of simulation and modeling applications.
Distributed AI/ML Training Acceleration
In an enterprise GPU farm running large-scale deep learning frameworks, the 834977-B22 Mellanox IB EDR v2 36p RAF Switch interconnects 64 NVIDIA DGX servers via GPUDirect RDMA. By providing lossless 100 Gb/s throughput and ultra-low latency, it accelerates gradient synchronization, cuts epoch times by 50 %, and achieves near-linear scaling across multi-node training clusters.
NVMe-over-Fabrics Storage Consolidation
In a financial services data center centralizing SSD arrays, the 834977-B22 Mellanox IB EDR v2 36p RAF Switch enables NVMe-over-Fabrics over InfiniBand with 100 Gb/s connectivity. This architecture delivers sub-millisecond I/O latency, triples storage throughput, simplifies high-availability configurations, and lowers TCO by consolidating silos into a unified, software-defined storage fabric.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 834977-B22 |  AW575B |  834978-B22 |  Q9D34A |  657787-B21 | |
|---|---|---|---|---|---|
| Depth | 12 inches | 14 inches | 18 inches | 18 inches | 12 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 64 MB | 256 MB | 256 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1 inches | 1 inch | 1.75 inches |
| IOS | IP Services | IP Services | IP Services | IP Services | LAN Lite |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 3 | Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 834977-B22 | AW575B | 834978-B22 | Q9D34A | 657787-B21 |
| Media Type Supported | Combo | Twisted Pair / Fiber / Combo | Combo | Twisted Pair / Fiber / Combo | Combo |
| Memory | 256 MB | 256 MB | 512 MB | 512 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | POE+ | POE+ | POE+ | POE+ | POE |
| Port/Expansion Slot Details | 24 Ethernet ports with 4 SFP uplink slots | 2 expansion slots for additional modules | 2 expansion slots | 2 expansion slots for stacking modules | 4 expansion slots available for stacking modules |
| Power Consumption | 75 W | 120 W | N/A | 250W | 120W |
| Power Source | Redundant Power Supply / AC Power Supply | Dual AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply with Redundant Option |
| Product Name | 834977-B22 Stackable Gigabit Ethernet Switch | AW575B Advanced Modular Switch | 834978-B22 High-Performance Enterprise Switch | Q9D34A UltraScale Network Switch | 657787-B21 Next-Gen Network Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | Yes |
| SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 128 Gbps | 128 Gbps | 128 Gbps | 640 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 256 Gbps | 1,280 Gbps | 256 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 10G |
| Weight | 15 lbs | 15 lbs | 10 lbs | 20 lbs | 15 lbs |
| Width | 17.5 inches | 19 inches | 17.5 inches | 17 inches | 17.5 inches |
Reviews & Ratings
N
Nathan Brooks
5
Low latency and stable operation.
S
Scott Palmer
5
Handled compute traffic efficiently.
G
George Lane
5
Reliable for clustered environments.
L
Leonard Shaw
5
Solid performance under sustained load.
Questions & Answers
What is the Mellanox IB EDR v2 36p RAF Switch (SKU: 834977-B22)?
The Mellanox IB EDR v2 36p RAF Switch (834977-B22) is a high-performance 36-port InfiniBand EDR chassis designed for data center and HPC environments, delivering up to 100 Gb/s per port with low latency and full redundancy.
How many ports and what speeds does the 834977-B22 switch support?
The 834977-B22 switch features 36 full-width InfiniBand EDR ports, each supporting up to 100 Gb/s of bi-directional throughput, for a total non-blocking bandwidth of 7.2 Tb/s.
What is InfiniBand EDR technology?
InfiniBand EDR (Enhanced Data Rate) is a high-speed interconnect offering 100 Gb/s per port, ultra-low latency (sub-600 ns), and advanced RDMA capabilities for HPC, AI/ML, and data center applications.
Which applications are best suited for this switch?
This switch excels in HPC clusters, AI/ML training, data analytics, virtualization, and storage fabrics that require ultra-low latency, high throughput, and scalable RDMA performance.
What is the typical latency for this InfiniBand switch?
The Mellanox IB EDR v2 36p RAF Switch achieves message latencies under 600 nanoseconds, ensuring minimal overhead for latency-sensitive workloads.
Does the switch support RDMA and GPUDirect technologies?
Yes, the 834977-B22 supports full RDMA over InfiniBand and NVIDIA GPUDirect RDMA, enabling direct data transfer between GPUs and network adapters for optimal performance.
What management interfaces are available?
Management is provided via an on-board web GUI, CLI (via SSH), SNMP, and support for Mellanox NEO and SN2700 network diagnostics software.
How is the switch powered and cooled?
The switch includes dual hot-swappable 1,200 W AC power supplies and front-to-rear redundant fan modules for optimal airflow and high availability.
What form factor does the 834977-B22 use?
The 834977-B22 is a 1U rack-mount chassis measuring 19 inches wide and 43 cm deep, suitable for standard 19-inch server racks.
Which transceivers and cables are compatible?
The switch supports QSFP28 EDR transceivers and passive/active copper cables up to 5 m, optical cables up to 100 m (OM4), and DAC cables up to 3 m.
Is the switch interoperable with previous Mellanox InfiniBand generations?
Yes, it maintains backward compatibility with FDR and QDR InfiniBand devices, enabling seamless integration in mixed-generation fabrics.
Which topologies does the 36-port switch support?
It supports fat-tree, leaf-spine, and mesh network topologies, allowing scalable multi-rack deployments with minimal blocking and predictable performance.
What firmware or software version is required?
Mellanox recommends running SwitchX-2 firmware version 15.x or later, along with Unified Fabric Manager (UFM) for advanced monitoring and management features.
How do I install and rack the 834977-B22?
Install the switch in a standard 19-inch rack, secure with included mounting brackets, connect AC power, and configure management interfaces per the Quick Start Guide.
What warranty and support options are available?
HPE provides a one-year limited warranty with 24x7 phone support, optional Proactive Care, and Software Support Service for firmware updates and technical assistance.
What are the power consumption specifications?
Under full load, the switch consumes up to 850 W. With dual power supplies, power efficiency exceeds 1.2 Tb/s per 100 W, optimizing data center energy use.