P51181-B21 HPE Broadcom BCM5719 OCP3 BASE-T 1GBPS 4 Port Ethernet Adapter

HPE P51181-B21 Broadcom Ethernet Network Adapter 

The HPE P51181-B21 Broadcom BCM5719 OCP3 BASE-T 1Gbps 4 Port Ethernet Network Adapter is a high-performance networking solution designed to enhance server connectivity, data communication efficiency, and network reliability in enterprise environments. Built for HPE ProLiant servers supporting the OCP 3.0 network adapter standard, this Ethernet adapter delivers dependable wired networking performance with four Gigabit Ethernet ports.

Featuring Broadcom BCM5719 controller technology, the HPE P51181-B21 adapter provides stable and efficient network operations for data centers, virtualization platforms, cloud infrastructure, and business-critical applications. Its four-port 1GbE BASE-T interface enables organizations to expand network capacity while maintaining compatibility with existing Ethernet infrastructures.

General Information

• Manufacturer: HPE
• Part Number: P51181-B21
• Device Type: Gigabit Ethernet Adapter

Technical Specifications 

• Controller: Broadcom BCM5719
• Form Factor: Plug-in Card
• Ports: 4 x Gigabit Ethernet
• Connectivity Technology: Wired
• Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet
• Data Transfer Rate: 128 Mb/s

Key Features of HPE P51181-B21 Ethernet Network Adapter

• HPE Broadcom BCM5719 OCP3 BASE-T Gigabit Ethernet Adapter
• Four integrated Gigabit Ethernet RJ-45 connectivity ports
• Supports Ethernet, Fast Ethernet, and Gigabit Ethernet protocols
• Designed for HPE ProLiant servers with OCP 3.0 slot compatibility
• Provides reliable wired network connectivity for enterprise workloads
• Plug-in card form factor for easy server integration
• Optimized for virtualization, cloud computing, and data center networking
• Offers scalable and efficient network communication performance

Benefits of Broadcom Ethernet Controller Integration

• Enhanced network stability for continuous server operations
• Efficient data packet management for improved performance
• Reliable communication between servers, switches, and network devices
• Enterprise-grade durability for long-term deployment
• Optimized compatibility with HPE server platforms

Flexible Network Deployment Options

• Dedicated network connections for different applications
• Improved traffic distribution across multiple ports
• Support for redundant network configurations
• Enhanced server-to-switch communication flexibility

Advantages of OCP 3.0 Network Adapter Architecture

• Streamlined installation compared to traditional PCIe expansion cards
• Improved server design flexibility
• Efficient utilization of available server expansion resources
• Optimized compatibility with next-generation HPE server platforms

Supported Data Link Protocols

• Ethernet connectivity for standard network communication
• Fast Ethernet support for broad compatibility
• Gigabit Ethernet capability for enhanced data transmission

Common Enterprise Use Cases

• Data center server networking
• Enterprise application hosting
• Virtualized server environments
• Cloud infrastructure deployments
• Database and storage network connectivity
• Business application servers
• High-availability network configurations

HPE P51181-B21 Broadcom Ethernet Network Adapter 

The HPE P51181-B21 Broadcom BCM5719 OCP3 BASE-T 1Gbps 4 Port Ethernet Network Adapter is a high-performance server networking solution designed to provide reliable, scalable, and efficient Ethernet connectivity for modern HPE ProLiant servers. Built with the Broadcom BCM5719 Ethernet controller, this OCP 3.0 network adapter delivers four Gigabit Ethernet ports through standard RJ-45 copper interfaces, enabling enterprise environments to achieve dependable network communication, improved server flexibility, and simplified infrastructure management.

Designed for data centers, cloud computing platforms, virtualization environments, and enterprise server deployments, the HPE P51181-B21 Ethernet Adapter provides a balanced combination of performance, compatibility, and energy efficiency. The adapter integrates directly into servers supporting the Open Compute Project (OCP) 3.0 form factor, allowing organizations to optimize internal server expansion while maintaining high-speed network access for demanding workloads.

Advanced Broadcom BCM5719 Ethernet Controller Technology

At the core of the HPE P51181-B21 network adapter is the Broadcom BCM5719 controller, a trusted Ethernet chipset widely recognized for delivering stable and efficient Gigabit Ethernet performance. This controller is engineered to support enterprise server requirements by offering advanced networking capabilities, reliable data transmission, and intelligent hardware acceleration features.

The Broadcom BCM5719 technology helps reduce CPU workload by handling essential networking tasks directly through the adapter hardware. This allows server processors to dedicate more resources to applications, databases, virtualization platforms, and other mission-critical workloads. The result is improved overall system efficiency and smoother network operations.

Reliable 1 Gigabit Ethernet Connectivity

The HPE P51181-B21 provides four independent 1Gbps BASE-T Ethernet ports, offering flexible copper-based connectivity for enterprise networks. Each port supports standard twisted-pair Ethernet cabling, making it easy to integrate with existing network infrastructure without requiring expensive cable upgrades or additional optical modules.

Gigabit Ethernet remains an essential networking technology for many organizations because it provides a cost-effective solution for server communication, management networks, storage connectivity, and business applications. With four separate Ethernet ports, this adapter enables improved network segmentation, increased bandwidth availability, and enhanced redundancy options.

OCP 3.0 Form Factor Design for HPE ProLiant Servers

The HPE P51181-B21 Broadcom BCM5719 OCP3 Ethernet Adapter utilizes the modern OCP 3.0 mezzanine form factor, which is designed specifically for next-generation server architectures. Unlike traditional PCIe network cards, OCP 3.0 adapters install into dedicated server slots, helping organizations maximize available expansion capacity while maintaining cleaner internal server layouts.

The OCP 3.0 standard provides a flexible and modular approach to server networking. IT administrators can easily select networking solutions based on their specific workload requirements, whether they need Gigabit Ethernet, higher-speed networking, or specialized connectivity options. The HPE P51181-B21 delivers a practical networking upgrade path for compatible HPE servers.

Benefits of OCP 3.0 Network Adapter Architecture

Optimized Server Integration

Because the adapter is designed for OCP 3.0 compatible HPE servers, it integrates efficiently with the server motherboard architecture. This design reduces the need for additional expansion cards and helps maintain optimal airflow inside the server chassis. Improved airflow management can contribute to better cooling performance and overall system reliability.

Flexible Network Expansion

The modular OCP design allows businesses to customize their server networking configuration according to application requirements. Organizations can deploy multiple server models while maintaining consistent networking standards across their infrastructure. This flexibility is especially valuable in large-scale data centers where simplified hardware management is important.

Enterprise-Class Networking Performance and Efficiency

The HPE P51181-B21 4 Port Ethernet Adapter is designed to support enterprise workloads that require stable and continuous network communication. With four Gigabit Ethernet interfaces, the adapter provides multiple connectivity options for server applications, virtualization environments, and network management tasks.

Modern businesses depend on reliable network adapters to maintain application availability and user productivity. The HPE P51181-B21 helps provide consistent Ethernet performance for file sharing, database operations, web hosting, virtualization platforms, and cloud-based services. Its efficient design supports demanding workloads while maintaining dependable data transfer performance.

Improved Network Availability Through Multi-Port Connectivity

A four-port Ethernet adapter provides additional flexibility compared to single-port networking solutions. Administrators can configure individual ports for different purposes, such as separating production traffic, management traffic, backup operations, and virtualization networks.

Multi-port connectivity also supports advanced network configurations including link aggregation and failover strategies. These features help organizations improve network availability by reducing the impact of individual connection failures and creating more resilient server environments.

Support for Virtualized Server Environments

Virtualization has become a fundamental technology in modern data centers, and reliable network connectivity is essential for virtual machines and hosted applications. The HPE P51181-B21 Ethernet Adapter provides the network performance required for virtualized server environments by offering multiple Gigabit Ethernet connections and efficient data processing capabilities.

When deployed in virtualization platforms, the adapter can help administrators separate network traffic among virtual machines, management systems, and storage resources. This improves organization, security, and performance within complex virtual infrastructures.

Compatibility and Deployment Applications

The HPE P51181-B21 Broadcom BCM5719 OCP3 BASE-T Ethernet Adapter is designed for use with compatible HPE ProLiant server platforms that support OCP 3.0 networking modules. It is suitable for organizations looking to enhance server connectivity without occupying traditional PCI Express expansion slots.

This network adapter is commonly deployed in enterprise data centers, corporate server rooms, hosting environments, and cloud infrastructure platforms. Its combination of four-port Gigabit Ethernet connectivity and OCP 3.0 compatibility makes it a versatile choice for a wide range of networking requirements.

Common Enterprise Use Cases

Data Center Server Networking

Data centers require dependable networking components to maintain continuous communication between servers, storage systems, and external networks. The HPE P51181-B21 provides the stable Ethernet connectivity required for server-to-server communication and infrastructure management.

Virtualization and Cloud Infrastructure

Virtualized environments rely on efficient network adapters to handle communication between physical servers and virtual resources. This four-port Ethernet adapter supports flexible network configurations that help administrators manage multiple traffic types effectively.

Business Applications and Database Servers

Enterprise applications, transaction systems, and database platforms require consistent network performance. The HPE P51181-B21 helps provide reliable connectivity for applications where network stability and availability are critical.

Key Features of HPE P51181-B21 Ethernet Adapter

Broadcom BCM5719 Controller-Based Networking

The Broadcom BCM5719 chipset provides proven Ethernet performance and enterprise-grade reliability. Its optimized architecture supports efficient packet processing and dependable network communication for professional server environments.

Four-Port 1Gb BASE-T Connectivity

Featuring four RJ-45 Gigabit Ethernet ports, the adapter enables flexible copper networking solutions. Multiple ports provide additional bandwidth options, network separation capabilities, and redundancy configurations.

OCP 3.0 Server Integration

The OCP 3.0 form factor allows seamless installation in compatible HPE servers. This modern design approach improves scalability, reduces installation complexity, and supports future server networking strategies.

Energy-Efficient Enterprise Networking

The HPE P51181-B21 is engineered to provide efficient networking performance while helping organizations optimize power consumption. Efficient hardware design contributes to lower operating costs and improved data center sustainability.

By adding four dedicated Gigabit Ethernet connections, the HPE P51181-B21 helps improve server networking capabilities and provides administrators with greater control over traffic management. It is a practical solution for expanding connectivity in professional computing environments.