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Virtual Connect module improved blade network efficiency.
638526-B21
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HP BLc VC Flex-10/10D Module Opt
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638526-B21
- Description:
- HP BLc VC Flex-10/10D Module Opt
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- Hpe
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638526-B21 Overview
638526-B21 is a high-performance, stackable switch engineered with a robust architecture that supports both Layer 2 and Layer 3 networking, ensuring efficient and reliable data routing. It features flexible power options including redundant and AC power supplies, and is equipped with a variety of Ethernet ports for both uplink and downlink connectivity, designed to meet the needs of modern enterprise environments.
This model is optimized for scalability and enhanced network performance, offering stacking capabilities that allow for increased switching capacity without compromising on speed. Its versatile design and support for advanced features such as POE+ and SFP ports make 638526-B21 ideal for diverse use cases ranging from campus networks to data centers.
638526-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 638526-B21 for additional pricing. Browse the full Hpe Storage Network Switches series or explore all Hpe products.
638526-B21 Specifications
- Product Type
- Switch
- Power Source
- Redundant Power Supply / AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- 55W
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Twisted Pair / Fiber
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- 638526-B21
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- POE+
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 64 MB
- Switching Capacity
- 128 Gbps
- Switching Capacity with Stacking
- 256 Gbps
- Product Name
- Enterprise Series Stackable Switch 638526-B21
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 12 inches
- Weight
- 12 lbs
638526-B21 Use Case
High-Performance Virtualized Data Center I/O Consolidation
In a global enterprise data center running hundreds of VMware ESXi hosts, the HP BLc VC Flex-10/10D Module Opt provides four FlexNICs per blade to consolidate LAN, SAN and management traffic over a single interconnect. By reducing physical cables by 75% and delivering up to 20 Gbps of dynamic bandwidth per server, IT teams achieve 30% faster VM provisioning, simplified network management and a 40% reduction in CapEx and OpEx associated with switch ports and transceivers.
Secure Multi-Tenant Cloud Infrastructure for Service Providers
A managed service provider hosts dozens of customer workloads on HPE BladeSystem c-Class. With the BLc VC Flex-10/10D Module Opt’s embedded Virtual Connect Manager, each tenant’s traffic is isolated into dedicated FlexNICs and FlexHAN networks. This granular segmentation ensures PCI DSS and HIPAA compliance while offering tenants guaranteed throughput up to 10 Gbps per FlexNIC. The outcome: improved SLAs, zero cross-tenant interference and a 50% reduction in VLAN sprawl and firewall rules.
Business Continuity and Seamless VM Mobility Across Data Centers
A financial services firm deploys two geographically dispersed HPE BladeSystem clusters connected via 10 GbE links provided by the BLc VC Flex-10/10D Module Opt. Leveraging HPE’s Virtual Connect FlexFabric, IT teams perform live vMotion migrations across sites without reconfiguring network or storage fabrics. This capability delivers sub-second failover, 99.99% application availability and supports regulatory requirements for non-disruptive disaster recovery, enabling the firm to avoid costly downtime and SLA penalties.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 638526-B21 |  QK710D |  R0P79A |  Q1H70B |  657787-B21 | |
|---|---|---|---|---|---|
| Depth | 12 inches | 14.5 inches | 12 inches | 10 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 inch | 1.75 inches |
| IOS | IP Services | LAN Base | 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 2 | Layer 2 / Layer 3 | Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 638526-B21 | QK710D | R0P79A | Q1H70B | 657787-B21 |
| Media Type Supported | Twisted Pair / Fiber | Twisted Pair | 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 | N/A | 24 x RJ45, 4 x SFP | 2 expansion slots for modular interfaces | 24 Ethernet ports with 4 SFP uplink ports | 4 expansion slots available for stacking modules |
| Power Consumption | 55W | 35 W | 150 W | 150 W | 120W |
| Power Source | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply | AC Power Supply with Redundant Option |
| Product Name | Enterprise Series Stackable Switch 638526-B21 | QK710D Gigabit Managed Switch | R0P79A High Performance Stackable Switch | Q1H70B High-Performance Stacking 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 | No | 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 | 256 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 400 Gbps | 512 Gbps | 256 Gbps |
| Uplink Configuration | 10G | 1G | 10G | 10G | 10G |
| Weight | 12 lbs | 10 lbs | 15 lbs | 15 lbs | 15 lbs |
| Width | 17.5 inches | 17.5 inches | 17.5 inches | 19 inches | 17.5 inches |
Reviews & Ratings
M
Martin Fenton
5
Reliable FlexFabric performance.
V
Victor Payne
4
Easy to deploy and manage.
O
Oliver Grant
5
Consistent throughput across blades.
N
Neil Turner
4
Solid blade networking component.
Questions & Answers
What is the HP BLc VC Flex-10/10D Module Opt (SKU 638526-B21)?
The HP BLc VC Flex-10/10D Module (SKU 638526-B21) is a Virtual Connect adapter delivering 10Gb Ethernet and Fibre Channel over Ethernet connectivity for HP BladeSystem c-Class enclosures.
Which HP enclosures support the Flex-10/10D Module?
The module is supported in HP BladeSystem c7000 and c3000 enclosures equipped with Virtual Connect expansion bays.
How many ports and what speeds does the Flex-10/10D Module offer?
It provides four 10Gbps Flex-10 ports, each capable of up to four FlexNICs, delivering up to 40Gbps total bandwidth.
What benefits does Flex-10 technology provide?
Flex-10 technology enables port partitioning, allowing each 10Gb physical port to be subdivided into up to four virtual NICs for improved network utilization.
Can I create multiple virtual NICs on each physical port?
Yes; each 10Gb port can host up to four FlexNICs or FlexHBAs, yielding up to 16 virtual functions per module.
Does the Flex-10D variant support Fibre Channel over Ethernet (FCoE)?
FCoE is supported on the Flex-10D variant when connected to compatible FCoE switches and with the necessary Virtual Connect FlexFabric license.
Are additional licenses required to use the Flex-10 features?
No additional licenses are required for basic Flex-10 operation; however, FCoE and FlexFabric features may necessitate a Virtual Connect FlexFabric license.
How do I install the Flex-10/10D Module into my enclosure?
Install the module by powering down the enclosure bay, sliding it into the designated Virtual Connect slot, securing the latch, and powering on the enclosure.
Which cable types are compatible with this module?
Supported cables include SFP+ transceivers for fiber connectivity and 10Gb Direct Attach Copper (DAC) Twinax cables.
How is the Flex-10/10D Module managed?
Management is available via HP Virtual Connect Manager, HP OneView, or VMware vCenter with the HP Virtual Connect plug-in.
Is the Flex-10/10D Module hot-pluggable?
Yes; the module is hot-pluggable, allowing insertion or removal without shutting down the enclosure.
How do I upgrade the module’s firmware?
Firmware upgrades are performed through HP Onboard Administrator or Virtual Connect Manager by importing the firmware package via network or USB.
What warranty and support options are available?
The module carries a one-year limited HP warranty, with optional HP Care Pack service extensions for enhanced support.
How do I configure and monitor FlexNIC profiles?
FlexNIC profiles are configured and monitored in Virtual Connect Manager by defining port profiles, FlexNIC counts, and server bay mappings.
Can this module be used in a converged infrastructure?
Yes; the module integrates into HP Converged Infrastructure, supporting unified Ethernet, FCoE, and iSCSI fabrics in BladeSystem environments.
What is the difference between Flex-10 and Flex-10D?
The Flex-10D variant adds native FCoE support and direct-attached fiber options compared to the standard Flex-10 module.
Where can I purchase or replace the Flex-10/10D Module?
The module (SKU 638526-B21) is available through authorized HP resellers, HP’s online store, and HP spare parts channels.