HP 516937-B21 Dual-Ports Networking 10Gigabit Ethernet Card
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Why 516937-B21 HP 2-Ports 10GBPS PCI Express Refurbished is the best?

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Part Number#: 516937-B21
List Price was: $95.48
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Short Description:
516937-B21 HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter for c-Class BladeSystem. Refurbished.

Interface Types of This Product: Ethernet 10GB

Product Condition:
Warranty provided by ALLHDD.COM:
30 Days
We are giving specifications below, why one should consider procuring HP 10GB Ethernet Networking features, a general overview, description, performance specification, relevant images, a competitive price infographic, and technical information about the 516937-B21 model with compatibility.

Network Expansion and Connectivity

Network Expansion and Connectivity is an essential aspect of any network infrastructure, especially for organizations that need to support large-scale data transfer and communication requirements. The HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter for c-Class BladeSystem is a powerful networking solution that provides high-speed connectivity, increased bandwidth, and scalability for organizations that need to expand their network infrastructure.

One of the key benefits of the HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter is its ability to support high-speed connectivity. With support for speeds of up to 10Gbps, this adapter is designed to provide fast, reliable connections for data transfer and communication. This high-speed connectivity is critical for organizations that need to transfer large amounts of data quickly, such as those in the financial, healthcare, or scientific industries.

Another benefit of the HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter is its increased bandwidth. The adapter can handle more data and provide faster transfer rates, which leads to improved network performance. This increased bandwidth is especially important for organizations that need to support high-volume data transfer requirements, such as data backup and recovery, video streaming, and virtualization.

Scalability is another critical aspect of the HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter. The adapter can support multiple connections, and administrators can easily scale it to meet the needs of growing networks. This feature makes it an ideal solution for organizations that need to support future growth and expansion.

The adapter also provides reduced latency, which is important for organizations that require low-latency connections for high-performance applications. Reduced latency ensures that data is transmitted quickly and efficiently, without delay, making it an ideal solution for organizations that use high-performance applications such as virtualization, video streaming, and cloud computing.

Easy installation and configuration are also important features of the HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter. Administrators can quickly install and configure the adapter, saving time and effort. The adapter is also compatible with a wide range of servers and operating systems, ensuring it can be used in a variety of environments.

Finally, the adapter comes with monitoring and management tools that help administrators monitor and manage network connections and ensure optimal performance. These tools are critical for organizations that need to maintain high levels of network performance and availability.

Security and Access Control

The HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter for c-Class BladeSystem (516937-B21) comes with various security and access control features that ensure data protection and prevent unauthorized access.

One of the security features of this network adapter is the Integrated Media Access Control (MAC) Address Security that helps prevent unauthorized access to the network by allowing administrators to define a list of MAC addresses that are allowed to access the network. This feature ensures that only authorized devices are allowed to communicate with the network, thereby enhancing the network's security.

Another security feature of the network adapter is the Link Aggregation Control Protocol (LACP) that helps in protecting against network failures by allowing the adapter to link with another adapter, switch or server to provide redundancy and increase bandwidth availability. The LACP feature also ensures that data is transmitted securely and reliably across the network, minimizing the risk of data loss or corruption.

Access control is another important aspect of security, and the HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter for c-Class BladeSystem includes features such as user authentication and access control lists (ACLs) to enhance security. The adapter supports multiple authentication mechanisms such as RADIUS, TACACS+, and Secure Shell (SSH) to ensure that only authorized users can access the network. Additionally, the adapter supports ACLs that allow administrators to define policies that determine what types of traffic are allowed or denied on the network. This feature ensures that only authorized users can access network resources and reduces the risk of network attacks or data breaches.

Easy Management and Monitoring

The HP 2-Ports 10GBPS PCI Express G2 Host Channel Network Adapter for c-Class BladeSystem (516937-B21) comes with several features that make management and monitoring of the adapter and the network easy and efficient.

One of the management features of this adapter is the HP Systems Insight Manager (SIM) that provides a centralized management interface for managing servers, storage, and network devices. With the HP SIM, administrators can monitor the performance and health of the adapter and the network from a single console, making it easy to manage and troubleshoot network issues.

The adapter also comes with HP Onboard Administrator (OA) that provides remote management and monitoring capabilities for the blade system. With the OA, administrators can perform firmware updates, configure network settings, and monitor the health and performance of the blade system from a remote location.

The adapter supports Simple Network Management Protocol (SNMP) that allows network administrators to manage and monitor the adapter and the network from a single console. SNMP provides a standardized method for collecting and organizing information about network devices, making it easy for administrators to monitor the performance and health of the adapter and the network.

The adapter also supports various diagnostic and troubleshooting tools that make it easy to diagnose and resolve network issues. The adapter comes with built-in diagnostics that can be used to test the adapter and identify any hardware issues. Additionally, the adapter supports various network diagnostic tools such as ping, traceroute, and netstat that can be used to diagnose network issues and determine the source of the problem.

General Information

  • Manufacturer: HP
  • MPN: 516937-B21
  • Type: Network Adapter - 2 Ports
  • Form Factor: Plug-in Card
  • Spare Part Number: 518001-001
  • SKU: 516937-B21
  • Interface (Bus) Type: PCI Express

Interfaces / Ports

  • Host Interface PCI Express

I/O Expansions

  • Expansion Slot Type SFP+
  • Network & Communication
  • Network Technology 10GBase-X
  • Physical Characteristics
  • Form Factor Plug-in Card


  • Environmentally Friendly Yes
  • Environmental Certification WEEE

Compatibility Information

  • HP ProLiant DL Series: DL160 G5, DL160 G5p, DL160se G6, DL165 G5, DL165 G5p, DL165 G5p Base, DL165 G5p Efficiency, DL165 G5p Entry, DL165 G5p Performance, DL165 G6, DL165 G7 Performance,
  • DL185 G5, DL360 G7, DL360 G7 Base, DL360 G7 Entry, DL360 G7 Performance, DL380 G7, DL380p Gen8, DL380p Gen8 Base, DL380p Gen8 Entry, DL380p Gen8 High Performance, DL380p Gen8 Special, DL385 G6 Performance, DL580 G7, DL580 G7 Base, DL580 G7 High Performance, DL585 G7, DL585 G7 Base, DL585 G7 Performance
  • HP ProLiant SL Series: SL160s G6, SL165s G7.

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

Ethernet devices

All the networking systems are ballooning up, requiring you to send or receive packets of data in an increasing amount. Thus, the local area networks (LAN) and wide-area networks (WAN) call for well-designed protocols and communication formats to ensure better data transfer speeds. But what device or platform will fulfill this specific criterion without any hassle. That's the Ethernet, of course! But there are plenty of reasons why you need to own these high-speed Ethernet Networks in your arsenal. With that being said, we, at ALLHDD, brought you the fast Ethernet switches, which will be bliss for your computer networking setup. Here's how!

Ethernet Protocols Are Out-Of- This World!

These protocols are not just customary but are necessary for effective communication between all the connected devices. Whether the communication message is delivered, pending, or in unknown status, these communication protocols ensure more comfortable and faster communication.

All the connected devices send a packet of data that contains the essential information and is necessary to pass on. Thus, equipping your unit with a faulty and flawed Ethernet protocol might ruin the overall setup. Also, the packet collisions can destroy the Ethernet networks or computer networking this way.

Ethernet Types And Functionalities:

Ethernet usually has a standard range of up to 10km of the periphery. But under special conditions, this range can be extended. The fiber optic media converter can convert an Ethernet device into a fiber optic cable network containing the CAT5/CAT6 Copper cable before.

There are generally three types of Ethernet Devices which let you boom your connectivity range and ensure a seamless wired connection between your LAN devices.

Fast Ethernet is bliss!

The first and foremost type of Ethernet is the ''Fast Ethernet,'' which utilizes twisted-pair cables (CAT 5) for effective communication. The maximum speed that this internet connectivity can produce is up to 100mbps.

Gigabit Ethernet is a little extra!

Gigabit Ethernet is way more beyond the previous one! This type of connectivity offers up to 1000mbps speed. Therefore, considering the physical layer, this gigabit Ethernet is supported by the four pairs of twisted-pair cables contributing a little extra to the faster internet connectivity.

If you're into the video calling system or want to connect your camera, Gigabit Ethernet can be the best choice for your local area networks. Also, utilizing the CAT5e cables for connectivity will not confine your expectation. You can even use 1000Base SX fiber optic cables or Ethernet cable to cover up the range of 500m or above. 1-Port Gigabit Ethernet is the most common type in this category.

10 Gigabit Ethernet- Speed Beyond Expectations!

As mentioned in the name, 10-Gigabit Ethernet can support up to 10gbps speed, backed up by the CAT6a and CAT7 twisted-pair cables. However, a replacement with the fiber optic cables can extend the range up to 10000 meters.

Why Choose ALLHDD?

ALLHDD brings you quality ethernet devices that support computer networking under the rules and regulations devised by IEEE. Considering all types of networks, these devices are equipped with vast Ethernet ports and faster connections supporting the electronics engineer's tasks. You can also claim a 2.5% discount on some External, 1-port, and 10-Gigabit Ethernet devices on ALLHDD.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

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.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(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.

What is the Manufacturer/Brand Warranty?

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).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
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  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
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