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Martin Keene
5
Blade SAN switch worked reliably with mixed workloads.
AJ821C
HP B-series 8/24c BladeSystem SAN Switch
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AJ821C
- Description:
- HP B-series 8/24c BladeSystem SAN Switch
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- Brand:
- Hpe
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- List Price:
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AJ821C Overview
AJ821C is an enterprise-grade network switch featuring a cutting-edge architecture that integrates high-speed processing with robust power efficiency. It supports flexible power options including both AC and redundant power configurations, ensuring reliable operation in critical network environments while offering diverse port configurations for both copper and fiber connections.
The switch is engineered for optimal stacking and scalability with dedicated stacking ports that maximize performance in dense deployment scenarios. Designed for high-density data centers and branch office applications, AJ821C offers low latency switching performance, efficient energy consumption, and versatile use cases tailored for mission-critical network operations.
AJ821C price is $534.00, a 95% saving from the Hpe list price of $10,724.00. AJ821C is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for AJ821C for additional pricing. Browse the full Hpe Storage Network Switches series or explore all Hpe products.
AJ821C 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
- IOS
- IP Services
- Switching Capacity
- 128 Gbps
- POE Support
- POE+
- Uplink Configuration
- 10G
- Depth
- 12 inches
- Switching Capacity with Stacking
- 256 Gbps
- Width
- 17 inches
- Height
- 1 inches
- Weight
- 8 lbs
- Port/Expansion Slot Details
- 24 Ethernet ports, 4 SFP uplink ports
- Power Consumption
- 120W
- Manufacturer Part Number
- AJ821C
- Product Name
- AJ821C Network Switch
AJ821C Use Case
Virtualization and Storage Consolidation for Enterprise BladeSystem
Scenario: A global financial institution operates 500+ virtual machines across eight HP BladeSystem enclosures and needs a unified, high-speed SAN fabric. By deploying the AJ821C-HP B-series 8/24c BladeSystem SAN Switch as the 16 Gbps backbone, the IT team delivers sub-2 ms latency, scales to 100,000+ IOPS, and simplifies zoning using NPIV. Benefit: 30% reduction in storage latency, 40% higher throughput, and 25% lower SAN management overhead—enabling faster VM provisioning and streamlined operations.
Accelerated Backup and Disaster Recovery Replication
Scenario: A mid-market healthcare provider must complete nightly backups of 50 TB of patient and clinical data within a 4-hour window and replicate to a remote DR site. Leveraging the AJ821C-HP B-series 8/24c BladeSystem SAN Switch with integrated fabric services and secure zoning, the backup team runs parallel 16 Gbps replication streams over FC, cutting the backup window by 60%. Benefit: Compliance-ready data protection, RPO under 15 minutes, and a 70% faster failover recovery time—ensuring uninterrupted patient care.
High-Performance Big Data Analytics and HPC Fabric
Scenario: A research university deploys a 20-node HPC cluster for genomics and AI model training, requiring sustained high throughput and low latency storage. By integrating the AJ821C-HP B-series 8/24c BladeSystem SAN Switch with 16 Gbps Fibre Channel and advanced QoS, the cluster sustains 200 GB/s aggregate bandwidth with <1 ms latency at scale. Benefit: 20% faster model convergence, 50% higher data ingest rates, and effortless scalability—accelerating time-to-insight for critical research workloads.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 AJ821C |  638526-B21 |  Q2F24A |  QK753C |  834977-B22 | |
|---|---|---|---|---|---|
| Depth | 12 inches | 12 inches | 11.3 inches | 11 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 inches | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | IP Services | IP Services | IP Services | IP Services | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | AJ821C | 638526-B21 | Q2F24A | QK753C | 834977-B22 |
| Media Type Supported | Combo | Twisted Pair / Fiber | Twisted Pair / Fiber | Twisted Pair | Combo |
| Memory | 256 MB | 256 MB | 512 MB | 256 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, 4 SFP uplink ports | N/A | 4 expansion slots available | 8 fixed Ethernet ports and 2 expansion slots | 24 Ethernet ports with 4 SFP uplink slots |
| Power Consumption | 120W | 55W | 85 W | 150 W | 75 W |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply / N/A | Redundant Power Supply / AC Power Supply |
| Product Name | AJ821C Network Switch | Enterprise Series Stackable Switch 638526-B21 | Q2F24A Enterprise Stackable Gigabit Switch | QK753C High-Performance Network Switch | 834977-B22 Stackable Gigabit Ethernet 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 | 176 Gbps | 320 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 352 Gbps | 640 Gbps | 256 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 10G |
| Weight | 8 lbs | 12 lbs | 8 lbs | 15 lbs | 15 lbs |
| Width | 17 inches | 17.5 inches | 17.5 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
H
Henry Blake
4
Easy to integrate into BladeSystem.
V
Victor Stone
5
Stable SAN connectivity.
A
Andrew Miles
3
Predictable Fibre Channel performance.
J
Julian Wood
4
Good option for blade SAN environments.
Questions & Answers
What is the HP B-series 8/24c BladeSystem SAN Switch (AJ821C)?
The AJ821C is an enterprise-class 8-port 8 Gbit/s Fibre Channel core switch with 16 fixed 8 Gbit/s downlink ports for HP BladeSystem enclosures, designed for scalable, low-latency SAN fabrics.
How many ports does the 8/24c SAN Switch provide and what are their types?
It offers eight native 8 Gbit/s Fibre Channel uplink ports and 16 built-in 8 Gbit/s downlink ports for server blades, enabling high-speed connectivity within BladeSystem chassis.
What throughput and latency can I expect from this switch?
Each port delivers line rate performance at 8 Gbit/s with sub-1 µs port-to-port latency, supporting aggregate bandwidth up to 192 Gbit/s.
Is the AJ821C compatible with all HP BladeSystem enclosures?
Yes. It is fully compatible with c7000 and c3000 BladeSystem enclosures that support HP B-series SAN fabrics.