HPE 817749-B21 Ethernet Adapter
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HPE 817749-B21 25GBPS PCI Express 640flr-SFP 28 Ethernet 2 New

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Part Number#: 817749-B21
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Short Description:
817749-B21 2 Ports Gigabits Per Second (25GBPS) Peripheral Component Interconnect Express (PCI-E)3.0 x8 640FLR-Small Form-Factor Pluggable (SFP28) Server Network Adapter | Made by HPE | New Sealed Spare
Product Condition:
New Sealed Spare
Warranty provided by ALLHDD.COM:
30 Days

Detail Specifications for the HPE 817749-B21 Network Adapter

In the rapidly evolving landscape of networking and data transfer, the choice of network adapters plays a crucial role in ensuring efficient and high-speed connectivity. One such notable network adapter is the HPE 817749-B21, designed to meet the demands of modern data centers and enterprise environments. This article provides a detailed exploration of the key features, specifications, and benefits of the HPE 817749-B21 25Gbps PCI Express 640flr-SFP 28 Ethernet 2 Ports Network Adapter.

The HPE 817749-B21 is a network adapter that operates at a speed of 25 gigabits per second (Gbps), making it suitable for high-performance networking tasks. It utilizes the PCI Express interface, specifically the 640flr-SFP variant, and provides two Ethernet ports for enhanced connectivity. This network adapter is designed to address the increasing demand for faster and more reliable data transfer in modern IT infrastructures.

Key Features High-Speed

The primary highlight of the HPE 817749-B21 is its impressive speed of 25Gbps. This allows for rapid data transfer, making it ideal for environments where large volumes of data need to be processed quickly. Whether it's handling massive datasets or supporting high-traffic networks, this adapter ensures a swift and responsive connection.

PCI Express Interface

The network adapter utilizes the PCI Express interface, a high-speed serial computer expansion bus standard. The specific use of the 640flr-SFP variant ensures compatibility with systems that support this interface. PCI Express is known for its efficiency in handling data traffic and is widely adopted in modern computing architectures.

Dual Ethernet Ports

With two Ethernet ports, the HPE 817749-B21 offers versatility in network connectivity. This dual-port design allows for load balancing, link aggregation, and redundancy, enhancing the reliability and performance of network connections. It also provides flexibility in configuring the adapter to meet specific networking requirements.

Advanced SFP28 Connectors

The inclusion of SFP28 (Small Form-Factor Pluggable 28) connectors further enhances the adaptability of this network adapter. SFP28 connectors support higher data rates compared to previous SFP variants, contributing to the overall efficiency and speed of data transmission.

Benefits of HPE 817749-B21

Enhanced Performance

The 25Gbps speed of the HPE 817749-B21 significantly enhances the performance of network operations. This is particularly crucial in scenarios where quick data transfers are essential, such as in large-scale data processing and real-time applications.


The dual Ethernet ports and advanced connectors provide scalability options for expanding network capabilities. Whether you need to accommodate more devices or increase bandwidth, the HPE 817749-B21 offers a scalable solution to meet growing networking demands.

Reliability and Redundancy

The dual-port design and support for features like load balancing and link aggregation contribute to the reliability of network connections. In the event of a link failure, the redundant paths ensure uninterrupted data flow, minimizing downtime and enhancing system reliability.

Compatibility and Integration

Designed for modern data centers and enterprise environments, the HPE 817749-B21 is compatible with a wide range of systems. Its standard form factor ensures seamless integration into existing infrastructures, making it a versatile choice for organizations with diverse computing environments.


The utilization of advanced SFP28 connectors reflects a commitment to future-proofing network infrastructure. As technology continues to evolve, the HPE 817749-B21 remains well-positioned to support higher data rates and emerging networking standards.

General Information about the HPE 817749-B21

  • Manufacturer: HPE
  • Part Number or SKU# 817749-B21
  • Product Type: Network Adapter

Technical Information

  • Device Type: Network Adapter
  • Form Factor: Plug-in Card
  • Interface (bus) Type: FlexibleLOM
  • PCI Specification Revision: PCIe 3.0


  • Ports: 2 x 25 Gigabit Ethernet
  • Connectivity Technology: Wired
  • Data Link Protocol: 10 GigE, 25 Gigabit LAN
  • Data Transfer Rate: 25 Gbps
  • Performance: Bidirectional Throughput: 100 Gbps, Bandwidth Per Port: 50 Gbps
  • Capacity: Jumbo Frame Size: Up To 9.2 Kb
  • Remote Management Protocol: SNMP
  • Status Indicators: Link/Activity
  • Features: VLAN Support, IPv6 Support, Full Duplex Mode, TCP/IP Offloading, Quality of Service (QoS), Jumbo Frames Support, IPv4 Support, PXE Support, LACP Support, LLDP Support, Large Send Offload (LSO), Receive Side Scaling (RSS), UEFI Support, TCP Segmentation Offload (TSO), QoS Tagging, Extended Message-Signaled Interrupts (MSI-X), UDP/IP Offloading, TCP/IP Checksum Offload, RDMA over Converged Ethernet (RoCE), Virtual Extensible LAN (VXLAN), Network Virtualization using Generic Routing Encapsulation (NVGRE), RDMA over Converged Ethernet (RoCE) V2
  • Compliant Standards: IEEE 802.1Q, IEEE 802.1P, IEEE 802.3x, IEEE 802.3ad (LACP), IEEE 802.3ae, IEEE 802.1AB (LLDP), IEEE 802.3az, IEEE 802.1Qbb, IEEE 802.1Qaz, IEEE 802.1Qau, IEEE 802.1Qbg, IEEE 1588v2
  • Interfaces: 2 x 25Gb Ethernet - SFP28

In general, the HPE 817749-B21 25Gbps PCI Express 640flr-SFP 28 Ethernet 2 Ports Network Adapter stands out as a high-performance and versatile solution for modern networking challenges. With its impressive speed, dual Ethernet ports, and advanced features, it addresses the need for fast, reliable, and scalable connectivity in data centers and enterprise environments. As organizations continue to prioritize efficiency and speed in their IT infrastructure, the HPE 817749-B21 proves to be a valuable asset in meeting these demands. Whether used for data-intensive applications, virtualization, or general network connectivity, this network adapter exemplifies the commitment to innovation and performance in the realm of networking technology.

Product Condition:
New Sealed Spare
Warranty provided by ALLHDD.COM:
30 Days

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What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

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(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

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In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

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