P18671-B21 HPE 10/25GB Dual Port SFP28 Smart Interface Card

Product Outline of HPE P18671-B21 SFP28 Adapter

The HPE P18671-B21 network interface card delivers robust multi‑speed connectivity, advanced offloading capabilities, and dependable performance for modern virtualized and high‑bandwidth enterprise infrastructures.

Main Specifications

• Brand: HPE
• Part Number: P18671-B21
• Device Type: Dual‑port SFP28 Network Adapter

Technical Specifications

• Two SFP28 interfaces compatible with optical modules and DAC cabling
• Adaptive link speeds supporting 10GbE and 25GbE
• Bi‑directional throughput up to 50 Gb/s per port (aggregate 100 Gb/s)
• Compliant with 25GBase‑X and 10GBase‑X Ethernet specifications
• Optimized for low‑latency, high‑efficiency data movement

Expansion Slot Compatibility

• Interfaces through PCI Express 3.0 x8 host bus
• Designed for seamless installation in HPE ProLiant platforms

Physical Design

• Standup plug‑in card layout
• Includes both low‑profile and full‑height brackets for flexible deployment

Performance Optimization Technologies

• Large Send Offload (LSO) for efficient large‑packet processing
• TCP Segmentation Offload (TSO) to reduce CPU overhead
• Comprehensive TCP/UDP/IP checksum offload for accelerated throughput

Virtualization Enhancements

• SR‑IOV for direct VM‑to‑NIC mapping
• Support for VMware NetQueue and Microsoft VMQ
• Advanced tunnel offloads including VXLAN, NVGRE, and GENEVE

Enterprise Use‑Case Advantages

• Ideal for dense virtualized workloads and cloud‑native environments
• Reduces host CPU utilization through intelligent offloading
• Ensures stable, high‑bandwidth connectivity for demanding applications

HPE P18671-B21 2-Ports SFP28 Network Adapter

The HPE P18671-B21 2-Port 25Gb/s SFP28 GE 25GBase-X Network Adapter is a high-performance server networking solution designed to deliver advanced Ethernet connectivity for modern enterprise computing environments. Built to support demanding workloads, this adapter provides dual-port 25 Gigabit Ethernet capability through SFP28 interfaces, enabling organizations to improve network bandwidth, reduce latency, and enhance overall data transfer efficiency. Designed for use with compatible HPE ProLiant servers and enterprise platforms, this network adapter helps businesses create scalable and reliable infrastructures capable of supporting virtualization, cloud computing, high-performance applications, and data-intensive operations.

As part of the HPE Ethernet adapter family, the P18671-B21 combines high-speed connectivity, efficient data processing, and flexible deployment options. The adapter uses the 25GBase-X Ethernet standard with SFP28 ports, allowing administrators to connect servers to modern network switches using high-speed optical or direct attach copper cabling solutions. With two independent 25Gb/s ports, this adapter provides a total aggregate throughput of up to 50Gb/s, making it suitable for environments requiring fast server-to-server communication, storage networking, and application acceleration.

Advanced 25 Gigabit Ethernet Connectivity for Enterprise Servers

The HPE P18671-B21 network adapter is engineered to address the increasing demand for faster network communication in enterprise data centers. Traditional 1Gb and 10Gb Ethernet solutions can become performance limitations as organizations deploy larger databases, virtual machines, analytics platforms, and cloud-based applications. By providing 25Gb Ethernet connectivity, this adapter enables servers to handle significantly higher network traffic while maintaining efficient data movement and responsive application performance.

The dual SFP28 ports offer a compact and flexible interface designed specifically for 25Gb Ethernet deployments. SFP28 technology provides the bandwidth capabilities required by next-generation data centers while maintaining compatibility with existing cabling strategies. Network administrators can select suitable transceiver modules or direct attach cables based on infrastructure requirements, allowing the adapter to support a wide range of network architectures.

Dual-Port SFP28 Interface

The two-port SFP28 configuration of the HPE P18671-B21 provides flexible network connectivity for enterprise servers. Each port supports 25Gb/s Ethernet operation, allowing servers to establish multiple high-speed connections for improved redundancy, workload distribution, and network efficiency. Dual-port architecture is especially beneficial in environments where network availability and performance are critical.

Through the SFP28 form factor, this adapter supports high-speed Ethernet connections while maintaining a smaller physical footprint compared with older networking technologies. The compact interface design allows data centers to maximize rack density by supporting higher bandwidth without requiring excessive expansion space. This makes the adapter an ideal choice for modern server environments where efficiency and scalability are essential.

High-Speed 25GBase-X Ethernet Performance

The HPE P18671-B21 supports the 25GBase-X Ethernet standard, delivering a significant improvement in network performance compared with previous generations of server adapters. The 25Gb/s data rate allows organizations to transfer larger volumes of information faster, improving application responsiveness and reducing bottlenecks in demanding computing environments.

25G Ethernet technology is commonly used in modern data centers because it provides an optimal balance between speed, cost efficiency, and infrastructure scalability. It delivers more bandwidth than 10Gb Ethernet while requiring less complexity than higher-speed networking technologies. The HPE P18671-B21 allows organizations to upgrade their server connectivity while maintaining efficient use of existing data center resources.

Enterprise-Class Network Adapter Architecture

The HPE P18671-B21 is designed with enterprise-class networking capabilities that support reliable and efficient server communication. The adapter architecture is optimized for high-throughput environments where consistent performance is required. Whether deployed in virtualization platforms, private cloud environments, enterprise applications, or high-volume data processing systems, this adapter provides the connectivity foundation needed for modern workloads.

Network adapters play a critical role in server performance because they directly influence how quickly data can move between computing systems, storage resources, and network services. The P18671-B21 helps minimize communication delays by providing high bandwidth and efficient packet processing capabilities. This allows servers to deliver improved performance for applications that depend heavily on network communication.

Designed for Data Center Virtualization and Cloud Environments

Virtualized environments require powerful networking solutions capable of supporting multiple workloads running simultaneously on a single physical server. The HPE P18671-B21 25Gb Ethernet adapter provides the bandwidth required to support virtual machines, software-defined infrastructure, and cloud computing platforms. By increasing available network capacity, this adapter helps administrators allocate resources more effectively across virtualized systems.

Modern cloud environments depend on fast and reliable communication between servers, storage systems, and network services. The dual-port 25Gb Ethernet design enables efficient traffic management and provides additional connectivity options for distributed applications. This makes the adapter suitable for organizations building private clouds, hybrid environments, and highly available enterprise infrastructures.

Improved Network Efficiency for Virtualized Workloads

Virtualization increases server utilization by allowing multiple applications and operating systems to share hardware resources. However, increased server density also creates greater networking demands. The HPE P18671-B21 helps address these requirements by providing high-speed Ethernet connectivity that supports intensive virtual workloads.

With two 25Gb/s ports, administrators can configure network connections for different traffic types, including application traffic, management communication, and storage access. This separation improves network organization and helps maintain consistent performance across various workloads. The adapter supports efficient infrastructure planning by allowing businesses to scale network resources alongside computing requirements.

Flexible Cabling and Deployment Options

The SFP28 interface of the HPE P18671-B21 provides flexibility for different data center deployment scenarios. Organizations can choose from compatible SFP28 optical transceivers for longer-distance connections or direct attach copper cables for short-range, low-latency links. This flexibility allows the adapter to integrate into various network designs without requiring major infrastructure changes.

Optical connectivity options are commonly used in large data centers where servers may connect to switches located across different racks or areas. Direct attach copper solutions are often preferred for shorter connections because they provide cost-effective, high-speed communication with low power consumption. The adapter’s SFP28 compatibility enables administrators to select the appropriate connectivity method based on performance requirements and physical infrastructure.

Integration with HPE Server Platforms

The HPE P18671-B21 2-Port 25Gb/s SFP28 GE 25GBase-X Network Adapter is developed to integrate with supported HPE server platforms, providing reliable compatibility and simplified deployment. HPE networking solutions are designed to work closely with HPE server hardware, helping organizations create optimized and manageable infrastructure environments.

By selecting an HPE-certified network adapter, businesses can benefit from improved hardware compatibility, easier installation processes, and streamlined system management. The adapter is suitable for enterprise customers looking to enhance their existing HPE server deployments with faster Ethernet connectivity while maintaining a consistent hardware ecosystem.

Optimized Performance for Modern Applications

Enterprise applications continue to generate increasing amounts of network traffic due to growing data volumes, real-time processing requirements, and distributed computing models. The HPE P18671-B21 provides the bandwidth necessary to support applications such as large-scale databases, analytics platforms, content delivery systems, and enterprise collaboration solutions.

High-speed network connectivity helps reduce delays when transferring large files, accessing shared resources, or communicating between application servers. By increasing available network capacity, the adapter contributes to improved productivity and smoother operation of business-critical applications.

Reliable Networking for Business-Critical Infrastructure

Reliability is a key requirement for enterprise networking components. The HPE P18671-B21 is designed to provide stable and consistent Ethernet connectivity for servers operating in demanding environments. Organizations depend on reliable network adapters to maintain communication between critical systems and ensure continuous availability of applications and services.

The dual-port design also provides additional flexibility for network configuration, including redundant connections and optimized traffic management. This enables administrators to design resilient infrastructures capable of handling changing business requirements and increasing workloads.

Benefits of 25Gb Ethernet Technology in Data Centers

25Gb Ethernet has become an important networking technology for organizations seeking higher performance without the cost and complexity associated with migrating directly to much higher-speed solutions. The HPE P18671-B21 takes advantage of this technology by providing a practical upgrade path from older Ethernet standards while supporting modern data center requirements.

Compared with 10Gb Ethernet, 25Gb Ethernet provides substantially increased bandwidth using efficient server connectivity designs. This improvement allows organizations to consolidate network resources, improve application performance, and support more demanding workloads. The adapter enables businesses to modernize their infrastructure while maintaining operational efficiency.

Scalable Networking for Future Growth

Enterprise infrastructure requirements continue to evolve as businesses adopt artificial intelligence workloads, analytics applications, cloud services, and high-volume data processing. The HPE P18671-B21 provides a scalable networking foundation that can support current needs while allowing room for future expansion.

The adapter’s 25Gb Ethernet capability helps organizations prepare their server environments for increasing bandwidth requirements. By deploying higher-speed network adapters, businesses can reduce the need for frequent hardware upgrades and create infrastructure that remains capable of supporting future technology advancements.

Efficient Server Connectivity for Enterprise Environments

The HPE P18671-B21 combines performance, flexibility, and reliability in a compact server networking solution. Its dual SFP28 ports, 25GBase-X support, and enterprise-focused design make it suitable for organizations requiring fast and dependable communication between servers and network resources.

From virtualization clusters to cloud infrastructures and high-performance computing environments, this adapter provides the connectivity required to improve operational efficiency. It enables organizations to maximize server capabilities by removing network limitations and supporting faster data exchange across the enterprise environment.

Professional-Grade Ethernet Expansion

The HPE P18671-B21 2-Port 25Gb/s SFP28 GE 25GBase-X Network Adapter represents a professional-grade expansion option for organizations upgrading their server networking capabilities. With advanced Ethernet performance, flexible SFP28 connectivity, and support for modern data center applications, it delivers a dependable solution for businesses seeking improved network speed and efficiency.

Designed for enterprise workloads and scalable infrastructure deployments, this adapter provides the high-performance connectivity required for today's demanding computing environments. It helps organizations achieve faster communication, improved resource utilization, and a more efficient network architecture.