What is the port configuration of this adapter?

The provided data identifies this unit as a 2-port 10Gb Ethernet adapter. That means the adapter has two network ports and belongs to the 10GbE class, which is useful for buyers comparing port density across server network cards.

What interface category does it belong to?

It is categorized as a Dual-port 10GbE SFP+ PCIe x8 adapter. This gives buyers the relevant interface family and bus form factor from the supplied specifications, which are the main details needed for basic hardware matching.

Is this an enterprise product?

Yes, the product level is listed as Enterprise. That classification is explicitly included in the supplied data and helps procurement teams identify the adapter as part of an enterprise hardware lineup.

What model name is associated with SKU 581201-B21?

The provided data identifies the model as HPE NC550SFP 2-Port 10Gb Ethernet Adapter, spare 581199-001. This is the exact model designation tied to the SKU in the product data.

How many network ports are listed for this adapter?

The supplied specifications state that it is a 2-port adapter. Combined with the 10GbE classification, that means the product provides two 10 Gigabit Ethernet ports as described in the provided data.

581201-B21 - HPE 581201-B21 2-Port 10Gb Ethernet Adapter

Name: HPE 581201-B21 2-Port 10Gb Ethernet Adapter
Brand: HPE
SKU: 581201-B21
Price: 162 USD
Availability: InStock

581201-B21 - HPE 581201-B21 2-Port 10Gb Ethernet Adapter | US IT Hardware

Product overview

HPE 581201-B21 is the NC550SFP 2-Port 10Gb Ethernet Adapter in the Enterprise product level. It is categorized as a dual-port 10GbE SFP+ PCIe x8 Ethernet adapter and is identified as model HPE NC550SFP 2-Port 10Gb Ethernet Adapter, spare 581199-001. The provided data confirms the product type, dual-port design, 10Gb Ethernet class, SFP+ interface category, and PCIe x8 form factor classification. This makes it suitable for procurement records that need a clearly identified enterprise network adapter with a specific HPE SKU. No additional features, performance figures, or power values are provided in the supplied specifications, so this description is limited to the confirmed product identification and category details.

Dual-port 10Gb Ethernet adapter
SFP+ interface class
PCIe x8 network adapter
HPE enterprise product level
Model NC550SFP
SKU 581201-B21

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Supported Standards
Manufacturer part #	581201-B21
Brand	HPE
Condition	Refurbished
Model	581201-B21
Form Factor	Plug-in Card
IPv6 Support	Supported
Product Line	NC550SFP
Product Type	Network Adapter
Compatible Slots	1 x PCI Express 2.0 x8
TCP/IP Offloading	Supported
Quality of Service	Supported

Compatible systems

HPE 581201-B21 is a dual-port 10GbE SFP+ PCIe x8 network adapter for select ProLiant servers.

HPE ProLiant DL Series, ML Series, SL Series
Model: Multiple listed ProLiant models
Form factor: Server systems
Generation: Gen5, Gen6, Gen7
Compatibility list appears on the retailer page and is tied to the exact SKU.

Best for

Enterprise networking
For enterprise environments that require an Ethernet adapter categorized at the Enterprise product level. The adapter is identified as a dual-port 10GbE SFP+ PCIe x8 model.
Dual-port upgrades
For systems that need a dual-port 10Gb Ethernet adapter. The provided data confirms two ports and 10GbE classification.
PCIe x8 systems
For platforms designed for a PCI Express x8 network adapter. The product category explicitly lists PCIe x8 as part of the adapter class.

Ports	2
Ethernet Speed	10 Gbps
Expansion Slots	2 SFP+
Data Link Protocol	10 Gigabit Ethernet
Interface (Bus) Type	PCI Express 2.0 x8

HPE 581201-B21 2-Port 10Gb Ethernet Adapter

Product overview

Featuring

Compatible systems

Best for

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

Performance

Networking Ports & Interfaces