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 deliver reliable wired connectivity, enhanced server communication, and efficient data transmission for enterprise computing environments. Built for HPE server platforms, this plug-in Ethernet adapter provides four Gigabit Ethernet ports, enabling organizations to expand network capabilities while maintaining stable and consistent performance.

General Information

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

Technical Specifications 

• Controller: Broadcom BCM5719
• Form Factor: Plug-in Card
• Interface: OCP3 Adapter
• Ports: 4 x Gigabit Ethernet
• Connectivity Technology: Wired
• Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet
• Data Transfer Rate: 128 Mb/s

High-Speed Gigabit Ethernet Connectivity for Enterprise Servers

• Four integrated Gigabit Ethernet ports for expanded network connectivity
• Supports 10/100/1000 Mbps Ethernet communication speeds
• Provides reliable wired network performance for enterprise servers
• Designed for efficient data transfer and optimized server communication
• Compatible with Ethernet, Fast Ethernet, and Gigabit Ethernet standards

Key Benefits of Broadcom BCM5719 Ethernet Controller

• Reliable network communication with enterprise-grade controller architecture
• Efficient handling of network traffic and data packets
• Optimized for HPE server environments and data center applications
• Supports scalable networking requirements for growing businesses
• Provides consistent performance for critical workloads

Optimized Networking Solution for Data Centers and Virtualized Environments

• Ideal for enterprise servers and data center deployments
• Supports virtualization and network-intensive applications
• Helps improve server connectivity and network flexibility
• Designed for consistent operation in demanding environments
• Provides multiple network interfaces from a single adapter

Reliable Gigabit Ethernet Performance

• Server virtualization environments
• Cloud computing infrastructure
• Enterprise database systems
• Web hosting platforms
• High-performance business applications
• Network management and monitoring solutions

Flexible Connectivity and Network Expansion

• Enhances server networking capabilities
• Provides multiple Ethernet connections through one adapter
• Supports flexible network configurations
• Helps simplify server connectivity management
• Suitable for various enterprise networking scenarios

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 for modern HPE ProLiant server environments that require reliable, scalable, and efficient Ethernet connectivity. This advanced Open Compute Project 3.0 (OCP3) compliant network adapter delivers four independent 1 Gigabit Ethernet ports through a compact mezzanine form factor, allowing organizations to expand server networking capabilities while maintaining excellent airflow, simplified cable management, and optimized rack density.

Built around the Broadcom BCM5719 Ethernet controller, the HPE P51181-B21 adapter provides dependable wired network communication with enterprise-class features suitable for data centers, cloud computing platforms, virtualization environments, and high-availability server applications. The adapter combines energy efficiency, advanced network management capabilities, and robust hardware acceleration technologies to support demanding workloads where consistent network performance is essential.

Enterprise-Class 1Gb Ethernet Connectivity for HPE ProLiant Servers

The HPE P51181-B21 Broadcom BCM5719 OCP3 1Gb Ethernet Adapter is engineered specifically for enterprise server infrastructures that require dependable network access and flexible deployment options. With four BASE-T Ethernet ports, this adapter enables multiple network connections from a single server, supporting improved network segmentation, workload isolation, and redundancy configurations.

Each port delivers 1 Gigabit Ethernet performance over standard copper cabling, providing compatibility with existing network infrastructures. The BASE-T interface allows organizations to utilize commonly available Ethernet cables while maintaining stable data transmission for business applications, virtualization platforms, database workloads, and storage networking environments.

Advanced OCP3 Mezzanine Adapter Design

The Open Compute Project 3.0 (OCP3) form factor of the HPE P51181-B21 provides a flexible and space-efficient networking upgrade option for compatible HPE ProLiant Gen10 Plus and newer server platforms. Unlike traditional PCI Express expansion cards that occupy standard PCIe slots, OCP3 adapters integrate directly into dedicated server networking slots, helping preserve valuable expansion capacity for additional hardware components.

This mezzanine-style design improves internal server organization by reducing cable clutter and supporting optimized airflow inside the chassis. Data center administrators can achieve higher server density while maintaining efficient cooling performance and easier maintenance procedures.

Broadcom BCM5719 Ethernet Controller Technology

At the core of the HPE P51181-B21 network adapter is the Broadcom BCM5719 controller, a proven Ethernet chipset widely recognized for enterprise networking reliability and efficient performance. The controller provides advanced Ethernet processing capabilities designed to reduce CPU utilization and improve overall server efficiency.

The Broadcom BCM5719 architecture supports intelligent offloading features that help optimize network traffic handling. By transferring specific networking operations from the server processor to the adapter hardware, the network card improves application responsiveness and allows system resources to focus on critical computing tasks.

Efficient Network Processing and Hardware Acceleration

Modern server environments require networking hardware capable of handling continuous data movement without creating unnecessary processing overhead. The HPE P51181-B21 Broadcom BCM5719 adapter incorporates hardware-based acceleration technologies that improve packet processing efficiency and enhance communication between servers, switches, and connected devices.

These capabilities make the adapter suitable for virtualization environments, enterprise applications, web hosting platforms, and distributed computing systems. By improving network efficiency, organizations can achieve smoother application performance and better utilization of server resources.

Key Features of HPE P51181-B21 4 Port Ethernet Adapter

The HPE P51181-B21 Ethernet Adapter delivers a combination of performance, flexibility, and enterprise reliability through its advanced networking features. Designed for professional IT environments, the adapter provides dependable connectivity for servers requiring multiple network interfaces and efficient traffic management.

Four-Port 1Gbps BASE-T Ethernet Capability

The four integrated RJ-45 Ethernet ports provide multiple 1Gbps network connections from a single server. This multi-port configuration allows administrators to create dedicated connections for different applications, configure network redundancy, and improve overall infrastructure flexibility.

Multiple Ethernet interfaces are especially valuable in environments where servers handle several network-intensive workloads simultaneously. Organizations can separate management traffic, application traffic, backup communication, and storage-related data flows to achieve better performance and improved network organization.

Reliable Copper Ethernet Compatibility

Supporting BASE-T copper Ethernet technology, the HPE P51181-B21 adapter works with widely deployed networking equipment, including enterprise switches, routers, and structured cabling systems. This compatibility reduces infrastructure upgrade requirements and allows businesses to integrate the adapter into existing networks with minimal complexity.

The use of standard copper Ethernet connectivity provides a cost-effective networking solution while maintaining enterprise-grade reliability. It is an ideal choice for organizations looking to enhance server connectivity without replacing existing network infrastructure.

Virtualization and Data Center Networking Benefits

Virtualized data centers require networking adapters capable of efficiently handling multiple virtual machines and dynamic workloads. The HPE P51181-B21 Broadcom BCM5719 OCP3 Ethernet Adapter supports advanced networking features that help improve virtualized server performance and simplify network management.

Optimized Support for Virtual Server Environments

In virtualization platforms, a single physical server may host numerous virtual machines requiring simultaneous network communication. The four-port design of the HPE P51181-B21 allows administrators to distribute traffic across multiple network connections, improving bandwidth availability and supporting flexible virtual networking configurations.

The adapter helps organizations build efficient virtualization infrastructures by providing reliable Ethernet connectivity between physical servers, virtual machines, and network resources. This makes it suitable for enterprise virtualization solutions, private cloud deployments, and hybrid IT environments.

Improved Network Availability and Redundancy

Network availability is a critical requirement for business applications and mission-critical services. The HPE P51181-B21 adapter supports configurations that enable network redundancy and failover strategies, helping maintain continuous connectivity during network changes or hardware issues.

By utilizing multiple Ethernet ports, administrators can implement resilient network designs that minimize downtime and improve service reliability. This capability is particularly beneficial for organizations operating applications that require consistent access and uninterrupted communication.

HPE Server Integration and Compatibility Advantages

The HPE P51181-B21 Broadcom BCM5719 OCP3 Network Adapter is designed to integrate seamlessly with compatible HPE ProLiant server platforms. As an HPE-qualified networking component, it provides dependable compatibility, simplified installation, and optimized performance within HPE server ecosystems.

Designed for HPE ProLiant Infrastructure

HPE ProLiant servers are widely used in enterprise environments because of their reliability, management capabilities, and scalability. The P51181-B21 adapter extends these capabilities by providing additional network connectivity through the dedicated OCP3 slot.

The adapter works together with HPE server management technologies, allowing administrators to maintain consistent hardware monitoring, configuration control, and system optimization. This integration simplifies deployment and reduces compatibility concerns commonly associated with third-party networking upgrades.

Simplified Installation and Maintenance

The OCP3 form factor enables straightforward installation compared with traditional add-in network cards. Because the adapter connects directly to the dedicated networking interface of compatible servers, installation requires less internal space and supports cleaner server configurations.

For data center operators managing large numbers of servers, simplified installation and maintenance can significantly reduce deployment time and operational complexity.

Enterprise Networking Applications for HPE P51181-B21

The HPE P51181-B21 Broadcom BCM5719 OCP3 BASE-T 1Gbps 4 Port Ethernet Network Adapter is suitable for a wide range of enterprise networking applications. Its combination of multiple ports, reliable Ethernet performance, and server-focused design makes it valuable across many IT environments.

Business Applications and Enterprise Servers

Organizations running business-critical applications depend on stable network communication between servers, users, storage systems, and external services. The HPE P51181-B21 provides reliable connectivity for application servers, database platforms, and enterprise software environments.

Its four-port architecture enables flexible network planning, helping businesses create efficient communication paths for different workloads while maintaining strong performance and reliability.

Cloud Computing and Hosting Infrastructure

Cloud service providers and hosting environments require networking hardware that can support multiple users, applications, and services. The HPE P51181-B21 adapter offers dependable Ethernet connectivity for server platforms used in cloud computing environments.

The adapter helps support scalable infrastructure designs where multiple servers communicate continuously across enterprise networks. Its efficient processing capabilities contribute to stable performance in environments with high levels of network activity.

Energy-Efficient Enterprise Networking

Energy efficiency is an important consideration in modern data centers. The HPE P51181-B21 is designed to provide effective networking performance while supporting efficient power utilization. Lower power consumption helps organizations reduce operational expenses and improve overall data center efficiency.

Scalable Networking Solution for Growing Businesses

As organizations expand their digital infrastructure, flexible networking solutions become increasingly important. The HPE P51181-B21 provides a scalable Ethernet connectivity option that can adapt to evolving business requirements.

With four Gigabit Ethernet ports, OCP3 compatibility, and Broadcom controller reliability, this adapter represents a practical solution for businesses seeking enhanced server networking capabilities without unnecessary infrastructure changes.