817709-B21 HPE 2-Ports SFP28 10/25GBPS 631FLR Adapter for Server

HPE 2-Ports 10/25GBPS Adapter

The HPE 817709-B21 631FLR Network Adapter is a high-performance solution offering dual SFP28 ports with 10/25GBPS capability. Designed for enterprise-grade systems, it ensures secure, fast, and reliable Ethernet connectivity for modern IT infrastructures.

Manufacturer Details

• Brand: Hewlett Packard Enterprise
• Part Number: 817709-B21
• Device Type: Network Adapter

Technical Information

Port Configuration

Number of Ports

• 2 x SFP28 ports
• Supports 25 Gigabit Ethernet

Data Link Protocols

• 10 Gigabit Ethernet (10 Gige)
• 25 Gigabit LAN

Data Transfer Rate

• Up to 25 Gbps throughput
• Optimized for high-bandwidth workloads

Advanced Features

Security and Reliability

• Firewall protection for enhanced safety
• Function Level Reset (FLR) support
• Secure Boot capability

Expansion and Connectivity

Expansion Slots

• Total Slots: 2
• Available Slots: 2 free (SFP28)

Compatibility Information

Designed For HPE ProLiant Servers

DL360 Gen10 Series

• DL360 Gen10 Base
• DL360 Gen10 Entry
• DL360 Gen10 High Performance
• DL360 Gen10 Performance

DL380 Gen10 Series

• DL380 Gen10 Base
• DL380 Gen10 Entry
• DL380 Gen10 High Performance
• DL380 Gen10 Performance

DL560 Gen10 Series

• DL560 Gen10 Base
• DL560 Gen10 Entry
• DL560 Gen10 Performance

High-Performance Server Networking Architecture Overview

The HPE 817709-B21 2-Port SFP28 10/25Gbps 631FLR Network Adapter is designed to deliver exceptional high-speed networking performance for enterprise-grade servers, particularly in HPE ProLiant environments. Built to support both 10 Gigabit Ethernet (10GbE) and 25 Gigabit Ethernet (25GbE) connectivity, this adapter provides flexibility, scalability, and optimized throughput for modern cloud computing, virtualization, and data-intensive workloads. Its dual-port configuration enhances redundancy and load balancing, ensuring continuous network availability in mission-critical operations.

This network adapter integrates seamlessly into the FLR (Flexible LOM Riser) slot architecture, enabling compact yet powerful deployment in rack-mounted and blade server systems. With SFP28 transceiver support, it allows organizations to leverage fiber optic infrastructure for ultra-low latency and high-bandwidth communication between servers, storage systems, and networking switches.

Enterprise-Grade Networking Efficiency and Scalability

Dual-Port Design for Enhanced Throughput

The dual-port structure of the HPE 817709-B21 network adapter is engineered to maximize data throughput and improve network resilience. Each port can operate independently or in tandem, providing efficient traffic distribution across workloads. This architecture is essential for virtualization platforms where multiple virtual machines require simultaneous and consistent network access without congestion.

10GbE and 25GbE Flexible Speed Support

One of the defining features of this adapter is its ability to support both 10Gbps and 25Gbps speeds. This backward compatibility allows enterprises to upgrade infrastructure gradually without replacing entire networking ecosystems. It ensures long-term investment protection while enabling progressive scaling as bandwidth demands increase in cloud-native environments.

Optimized for Virtualized Environments

The adapter is optimized for virtualization platforms such as VMware, Microsoft Hyper-V, and Linux-based KVM environments. It efficiently handles network segmentation, traffic isolation, and virtual switching, ensuring high performance even in heavily virtualized infrastructures. Advanced offloading capabilities reduce CPU overhead, allowing server processors to focus on application workloads rather than network processing.

Advanced SFP28 Interface Technology

High-Speed Optical Connectivity for Data Centers

The SFP28 interface is a key component of this network adapter, providing support for high-speed optical transceivers that deliver reliable and scalable connectivity. SFP28 technology is widely adopted in next-generation data centers due to its ability to support 25GbE links using compact form factors while maintaining energy efficiency.

Low Latency Data Transmission

With SFP28-based optical connections, the adapter ensures minimal latency across network paths. This is critical for real-time applications such as financial trading systems, high-performance computing clusters, and large-scale database operations where microseconds of delay can impact performance outcomes.

Efficient Fiber Optic Utilization

The use of fiber optic cables through SFP28 modules enhances signal integrity and extends transmission distance compared to traditional copper-based connections. This allows enterprises to design flexible data center layouts where servers and switches can be placed at greater distances without compromising performance or stability.

Hot-Swappable Transceiver Support

SFP28 modules are hot-swappable, enabling IT administrators to replace or upgrade transceivers without shutting down the system. This capability improves system uptime and reduces maintenance-related downtime, which is crucial for enterprise-level service continuity.

Integration with HPE ProLiant Server Ecosystem

Seamless Compatibility with HPE Infrastructure

The HPE 817709-B21 network adapter is specifically engineered for compatibility with HPE ProLiant servers, ensuring seamless integration with existing enterprise infrastructure. It leverages HPE’s firmware ecosystem and management tools, allowing centralized control and monitoring of network performance.

Optimized Firmware and Driver Support

The adapter benefits from HPE-validated firmware and drivers, ensuring stability, security, and performance optimization. This reduces compatibility risks and enhances long-term operational reliability in enterprise environments where consistent uptime is critical.

Flexible LOM Riser (FLR) Architecture

Space-Efficient Server Design

The FLR form factor allows the adapter to be installed directly into server systems without occupying traditional PCIe slots. This design maximizes internal space efficiency and enables more flexible hardware configurations within compact server chassis.

Enhanced System Scalability

By utilizing FLR architecture, enterprises can scale network capabilities without major hardware redesigns. This modular approach supports incremental upgrades, allowing organizations to adapt quickly to evolving workload requirements.

Key Optimization for Enterprise Workloads

High Bandwidth Data Processing Capabilities

The HPE 817709-B21 adapter is designed to handle high-bandwidth applications such as big data analytics, cloud storage systems, and large-scale virtualization clusters. Its ability to manage simultaneous data streams ensures consistent performance under heavy network load conditions.

Advanced Packet Processing Efficiency

The adapter incorporates advanced packet processing technologies that minimize CPU utilization by offloading network-related tasks. This improves overall server efficiency and allows more processing power to be allocated to application-level operations.

Support for RDMA over Converged Ethernet

Remote Direct Memory Access (RDMA) support enhances data transfer efficiency by enabling direct memory communication between servers without involving the CPU. This significantly reduces latency and improves throughput for distributed computing environments.

Load Balancing and Traffic Optimization

Dynamic Network Traffic Distribution

The dual-port design allows intelligent load balancing across network paths, ensuring optimal distribution of data traffic. This reduces bottlenecks and improves overall network responsiveness in high-demand environments.

Security and Reliability Features

Enterprise-Grade Network Security

Security is a fundamental aspect of the HPE 817709-B21 network adapter design. It supports secure boot mechanisms and firmware validation processes that protect against unauthorized modifications and firmware-level attacks.

Data Integrity Protection

The adapter ensures data integrity through error detection and correction mechanisms that minimize packet loss and transmission errors. This is essential for maintaining reliable communication in mission-critical environments.

High Availability and Redundancy

Failover Support for Continuous Connectivity

The dual-port configuration provides automatic failover capabilities, ensuring uninterrupted network connectivity in the event of a port or link failure. This redundancy is critical for maintaining uptime in enterprise data centers.

Robust Hardware Design

Built with enterprise-grade components, the adapter is designed to withstand continuous operation in demanding environments. Its thermal and electrical stability ensures long-term durability and consistent performance.