What is the network speed supported by the HPE P25960-B21 adapter?

The HPE P25960-B21, based on the Mellanox MCX623106AS-CDAT, is specified as an Ethernet 100Gb adapter. This means it is designed to operate at a 100Gb data rate, providing high-bandwidth connectivity suitable for demanding enterprise and data center applications that require 100Gb Ethernet links.

How many network ports does the Mellanox MCX623106AS-CDAT adapter provide?

: "The Mellanox MCX623106AS-CDAT Ethernet 100Gb adapter provides 2 ports using QSFP56 interfaces. It is explicitly described as a 2-port QSFP56 adapter for HPE, allowing two separate 100Gb Ethernet connections from a single card, which can be used for redundant uplinks or multiple network segments.

What bus interface does the HPE P25960-B21 adapter use?

According to the product data, the Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port QSFP56 Adapter for HPE uses a PCIe Gen4x16 bus type. This indicates that the adapter connects to the host system through a PCI Express Generation 4 x16 slot, providing a high-bandwidth interface between the server and the network adapter.

What is the form factor of the HPE Mellanox MCX623106AS-CDAT adapter?

The adapter is listed with a stand up form factor. This means it is designed to be installed as a stand up card in a compatible PCIe slot, rather than as a mezzanine or low-profile custom form factor. Data center planners should ensure that the target servers support a stand up network adapter in a PCIe Gen4x16 slot.

Which product identifier should be used when ordering this adapter for HPE environments?

For HPE environments, the adapter is identified by SKU P25960-B21 and described as the Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port QSFP56 Adapter for HPE. Using the SKU P25960-B21 helps ensure the correct HPE-specific version is procured consistently across multiple server deployments.

P25960-B21 - HPE P25960-B21 100Gb 2-port QSFP56 Ethernet adapter

Name: HPE P25960-B21 100Gb 2-port QSFP56 Ethernet adapter
Brand: HPE
SKU: P25960-B21
Price: 1035 USD
Availability: InStock

P25960-B21 - HPE P25960-B21 100Gb 2-port QSFP56 Ethernet adapter | US IT Hardware

Product overview

The HPE Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port QSFP56 Adapter, SKU P25960-B21, is an enterprise network adapter designed for high-bandwidth environments. This adapter provides Ethernet connectivity at 100Gb with two QSFP56 ports, supporting dense, high-speed network links for data center and enterprise deployments. It connects through a PCIe Gen4x16 bus interface, aligning with modern server architectures and enabling high-throughput data paths between server and network. Classified as a stand up form factor adapter, it integrates into compatible HPE server platforms where a dedicated, full-height expansion slot is available. Positioned in the network adapters category, it addresses requirements for scalable Ethernet connectivity at 100Gb speeds. With its dual-port QSFP56 design and PCIe 4.0 x16 interface, the P25960-B21 adapter is suited to enterprise workloads that depend on reliable, high-performance network infrastructure.

Ethernet connectivity at 100Gb data rate
Dual 100Gb QSFP56 ports on one adapter
PCIe Gen4x16 bus type for host interface
Stand up adapter form factor
Enterprise network adapter for HPE servers
Mellanox MCX623106AS-CDAT model, P25960-B21

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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

Manufacturer part #	P25960-B21
Brand	HPE
Condition	New
RSS	Yes
DPDK	Yes
RoCE	Yes
Model	Mellanox MCX623106AS-CDAT
NVGRE	Yes
VXLAN	Yes
SR-IOV	Yes
Series	Ethernet 100Gb 2-port QSFP56 Adapter
RoCE v2	Yes

Compatible systems

Compatible with certain HPE Gen10 Plus and Gen11 servers.

HPE Gen10 Plus
Form factor: Server
Generation: Gen10 Plus
Compatible with certain HPE Gen10 Plus servers
HPE Gen11
Form factor: Server
Generation: Gen11
Compatible with certain HPE Gen11 servers

Best for

High-bandwidth networking
Suitable for environments requiring Ethernet 100Gb connectivity, using the Mellanox MCX623106AS-CDAT 100Gb 2-port QSFP56 design to support high-throughput traffic between servers and aggregation or core switches.
Dual-port link topologies
The 2-port QSFP56 configuration allows flexible network designs, including dual-homing or separate network segments, using both 100Gb-capable ports on a single adapter.
PCIe Gen4x16 server integration
Designed with a PCIe Gen4x16 bus type, this adapter fits deployments standardizing on PCIe 4.0 server platforms that need high-performance Ethernet connectivity.
Enterprise data center upgrades
As an enterprise-level Ethernet 100Gb adapter, P25960-B21 supports data center refresh projects where moving to 100Gb connectivity and QSFP56 optics is a requirement.

Details

Shipping, warranty & returns

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Audit Logs	Yes

Interfaces	2 x 100Gb Ethernet QSFP56

PXE Support	Yes

Secure Boot	Yes

Product Line	HPE Ethernet Adapters

Product Type	Network adapter

RDMA Support	Yes

UEFI Support	Yes

iWARP Support	Yes

GENEVE Support	Yes

Tunnel Offload	Yes

Compatible Servers	Certain HPE Gen10 Plus and Gen11 servers

Hardware Root of Trust	Yes

Connectivity Technology	Wired

PCI Specification Revision	PCIe 4.0

Data Transfer Rate	100 Gbps

Power Consumption Operational	13 W

Networking Ports & Interfaces

Ports	2
Port Type	QSFP56
Host Interface	PCIe 4.0 x16
Data Link Protocol	Gigabit Ethernet, 10 Gigabit Ethernet, 25 Gigabit Ethernet, 40 Gigabit Ethernet, 50 Gigabit Ethernet, 100 Gigabit Ethernet
Interface (Bus) Type	PCI Express 4.0 x16
Network / Transport Protocol	iSCSI, IPv4, IPv6

HPE P25960-B21 100Gb 2-port QSFP56 Ethernet adapter