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641146-B21
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HP BLc Cisco B22HP Fabric Ext Module
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641146-B21
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- HP BLc Cisco B22HP Fabric Ext Module
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641146-B21 Overview
641146-B21 is a high-performance switch engineered with a robust architecture ideal for scalable network infrastructures. It features an efficient AC power supply with support for redundant configurations, ensuring continuity in mission-critical environments and versatile stacking capabilities for easy expansion.
Designed for demanding applications, 641146-B21 offers comprehensive port options including 24 Gigabit Ethernet ports and 4 SFP uplink ports, delivering reliable connectivity and exceptional throughput. Its advanced performance and streamlined management make it perfect for data centers, branch offices, and high-density network deployments.
641146-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 641146-B21 for additional pricing. Browse the full Hpe Storage Network Switches series or explore all Hpe products.
641146-B21 Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Layer Supported
- Layer 2
- Form Factor
- Rack-mount
- Power Consumption
- 60 W
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- 641146-B21
- Uplink Configuration
- 10G
- IOS
- LAN Base
- POE Support
- POE
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 24 Gigabit Ethernet ports, 4 SFP uplink ports
- Flash Memory
- 64 MB
- Switching Capacity
- 128 Gbps
- Switching Capacity with Stacking
- 256 Gbps
- Product Name
- Enterprise 24-Port Stackable Gigabit Switch
- Height
- 1.75 inches
- Width
- 19 inches
- Depth
- 10 inches
- Weight
- 12 lbs
641146-B21 Use Case
Accelerating Enterprise Data Center Spine-Leaf Fabric Scaling
In large-scale enterprise data centers requiring low-latency connectivity between HP BladeSystem c-Class enclosures, deploying the 641146-B21-HP BLc Cisco B22HP Fabric Ext Module enables seamless spine-leaf fabric extension over 10/40 GbE links. Benefit: Achieve sub-10 µs latency, scalable up to 160 Gbps per module, and centralized UCS management—resulting in 30% faster application delivery and minimized network congestion.
High-Performance VDI Infrastructure with Cisco B22HP Module
For virtual desktop infrastructure (VDI) environments demanding predictable I/O performance, integrating the 641146-B21-HP BLc Cisco B22HP Fabric Ext Module provides dedicated 40 GbE uplinks from BL460c Gen8 blades directly to the core network. Benefit: Deliver consistent user experience with 1:1 oversubscription, reduce storage-access latency by 25%, and simplify policy-based QoS enforcement.
Robust Multi-Site Disaster Recovery Connectivity
In multi-site DR deployments, the HP BLc Cisco B22HP Fabric Ext Module (641146-B21-HP) extends blade chassis fabrics across geographically dispersed data centers using secure VXLAN overlays over 10 GbE links. Benefit: Enable sub-second failover with zero-touch UCS policy orchestration, achieve RPO <1 s and RTO <5 min, and cut unplanned downtime costs by 40%.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 641146-B21 |  R0P13A |  R0P79A |  658250-B21 |  Q0U55B | |
|---|---|---|---|---|---|
| Depth | 10 inches | 11 inches | 12 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 | 64 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | LAN Base | 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 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 641146-B21 | R0P13A | R0P79A | 658250-B21 | Q0U55B |
| Media Type Supported | Combo | Combo | Twisted Pair / Fiber / Combo | Combo | Combo |
| Memory | 256 MB | 256 MB | 512 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 48 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 Gigabit Ethernet ports, 4 SFP uplink ports | N/A | 2 expansion slots for modular interfaces | 24 x 10/100/1000 Ethernet ports with 4 SFP uplink slots | N/A |
| Power Consumption | 60 W | 120 W | 150 W | 75 W | 350W |
| Power Source | AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Enterprise 24-Port Stackable Gigabit Switch | R0P13A High Performance Stackable Switch | R0P79A High Performance Stackable Switch | Enterprise Stackable Managed Switch 658250-B21 | Q0U55B 48-Port POE+ Gigabit Stackable 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 | 24 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 128 Gbps | 128 Gbps | 200 Gbps | 128 Gbps | 320 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 400 Gbps | 256 Gbps | 640 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 10G |
| Weight | 12 lbs | 8 lbs | 15 lbs | 15 lbs | 15 lbs |
| Width | 19 inches | 17.5 inches | 17.5 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
H
Henry Collins
5
Reliable connectivity between blade and core switches.
V
Victor Haynes
4
Stable performance with minimal configuration.
N
Neil Parsons
5
Good solution for extending fabric.
O
Oliver Wainwright
5
Predictable and dependable.
Questions & Answers
What is the HP BLc Cisco B22HP Fabric Ext Module?
The HP BLc Cisco B22HP Fabric Ext Module is a half-height passive Fibre Channel pass-thru interconnect designed for HP BladeSystem c-Class enclosures, delivering direct SAN connectivity from blade server adapters to external switches.
What are the key features of the HP BLc Cisco B22HP Fabric Ext Module?
The B22HP offers 16 Fibre Channel ports at up to 4 Gbps each, hot-swappable design, low latency, no active switching, and transparent signal pass-through for predictable SAN performance.
How many ports does the HP BLc Cisco B22HP Fabric Ext Module provide?
The B22HP provides 16 external Fibre Channel ports, supporting up to eight server mezzanine adapters per module and direct connections to external SAN switches.
What bandwidth does each port of the B22HP support?
Each port of the B22HP supports up to 4 Gbps full-duplex Fibre Channel, enabling up to 64 Gbps aggregate bandwidth per module.
Which HP BladeSystem c-Class enclosures are compatible with the B22HP Fabric Ext Module?
The B22HP is compatible with HP BladeSystem c7000 and c3000 enclosures and can be installed in any interconnect bay designated for Fibre Channel pass-thru modules.
Is the B22HP module hot-swappable?
Yes. The B22HP is fully hot-swappable, allowing installation or removal without powering down the blade enclosure or disrupting other fabrics.
How do I install the HP BLc Cisco B22HP Fabric Ext Module?
To install, power off the interconnect bay, slide the B22HP into the designated fabric bay until it clicks, secure the latch, power on the enclosure, and connect external Fibre Channel cables.
What external cables are required for the B22HP Fabric Ext Module?
The B22HP requires standard SFP-equipped Fibre Channel cables (LC to LC) or Cisco compatible dual-LC cables rated for 4 Gbps operations.
Does the B22HP module support both Fibre Channel and Ethernet?
No. The B22HP is strictly a Fibre Channel pass-thru module. For Ethernet connectivity, you must use an Ethernet or converged network adapter interconnect module.
Can I mix the B22HP with other HP c-Class interconnect modules?
Yes. You can mix the B22HP with other HP c-Class Ethernet, LAN-on-Motherboard, or Fibre Channel switch modules, provided you adhere to bay-mapping and fabric pairing rules.
What is the SKU and part number of the HP BLc Cisco B22HP Fabric Ext Module?
The SKU is 641146-B21 and the HP part number is PN 641146-B21 for the Cisco B22HP Fabric Ext Module.
What is the power consumption of the B22HP Fabric Ext Module?
The typical power consumption of the B22HP is 8 W per module, with no additional cooling requirements beyond standard c-Class enclosure fan support.
Does the B22HP require any software licensing or firmware updates?
No licensing is required. The B22HP operates as a passive pass-thru; firmware upgrades are unnecessary since it contains no active switching components.
How does the B22HP Fabric Ext Module differ from the Cisco 2224/2248 Fibre Channel switches?
Unlike active Cisco 2224/2248 switches, the B22HP is a passive pass-thru device with no in-module buffering or zoning, offering direct server-to-switch connectivity and lower latency.
What management and monitoring options are available for the B22HP module?
Since the B22HP is passive, management and monitoring are handled upstream on the connected SAN switches or through the HP Onboard Administrator for port mapping visibility.
What warranty and support are included with the HP BLc Cisco B22HP Fabric Ext Module?
The B22HP is covered by HP’s standard 3-year parts, labor, and onsite support warranty when installed in an HP BladeSystem c-Class enclosure.
Where can I purchase or order the HP BLc Cisco B22HP Fabric Ext Module?
You can order the B22HP from authorized HP resellers, the HPE online store, or contact HP sales directly using SKU 641146-B21 for availability and pricing.