What network types are supported by the HPE P23666-B21 adapter?

The HPE P23666-B21 adapter supports InfiniBand HDR100 and Ethernet 100Gb networking. This combined capability allows the adapter to be used in both InfiniBand fabrics and Ethernet networks. The dual support helps organizations standardize on a single adapter model where both fabric technologies are present or planned.

How many ports does the HPE P23666-B21 adapter provide and what is the port form factor?

The HPE P23666-B21 adapter provides two network ports, described as a 2-port QSFP56 configuration. Each port uses the QSFP56 form factor, which is commonly used for 100Gb connectivity. This dual-port arrangement enables either aggregate bandwidth or redundant connections from a single adapter card.

What host interface does the HPE InfiniBand HDR100 Ethernet 100Gb adapter use?

The adapter uses a PCIe 4.0 x16 host interface, as indicated in the product designation. This means it is designed for installation in server PCIe 4.0 x16 slots. The PCIe 4.0 standard provides the bandwidth necessary to support dual 100Gb-class ports without saturating the host bus under typical high traffic loads.

Is the HPE P23666-B21 adapter suitable for environments requiring 100Gb connectivity?

Yes, the HPE P23666-B21 adapter is described as an InfiniBand HDR100 Ethernet 100Gb 2-port QSFP56 PCIe4 x16 adapter. This indicates that it is aimed at 100Gb-class connectivity on both InfiniBand and Ethernet. It is appropriate for deployments that specify 100Gb links across dual ports for bandwidth-intensive applications.

P23666-B21 - HPE Hewlett Packard Enterprise P23666-B21 2-port 100Gb QSFP56 adapter

Name: HPE Hewlett Packard Enterprise P23666-B21 2-port 100Gb QSFP56 adapter
Brand: HPE
SKU: P23666-B21
Price: 1060 USD
Availability: InStock

P23666-B21 - HPE Hewlett Packard Enterprise P23666-B21 2-port 100Gb QSFP56 adapter | US IT Hardware

Product overview

The Hewlett Packard Enterprise HPE InfiniBand HDR100 Ethernet 100Gb 2-port QSFP56 PCIe4 x16 MCX653106A-ECAT Adapter, SKU P23666-B21, is a dual-port network adapter designed for high-bandwidth environments. It combines InfiniBand HDR100 and Ethernet 100Gb capabilities in a PCIe 4.0 x16 form factor to support data-intensive workloads. With two QSFP56 ports, it enables flexible connectivity options aligned to modern high speed networking standards. This adapter is suited for deployments that require both InfiniBand and Ethernet connectivity in a single device. The design supports efficient integration into compatible server platforms, allowing IT teams to standardize on a single adapter model for mixed-protocol networks. The focus on dual-port 100Gb operation helps simplify cabling and network design where high throughput and flexibility are required across data center or cluster infrastructures.

Dual-port QSFP56 design for two high speed links
Supports InfiniBand HDR100 and Ethernet 100Gb
PCIe 4.0 x16 host interface compatibility
Hewlett Packard Enterprise branded adapter
MCX653106A-ECAT based network adapter model
SKU P23666-B21 for consistent procurement

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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

Manufacturer part #	P23666-B21
Brand	HPE
Condition	Refurbished
Model	HPE InfiniBand HDR100/Ethernet 100Gb 2-port QSFP56 PCIe4 x16 MCX653106A-ECAT Adapter
Bus Type	PCIe 4.0 x16
Form Factor	Low profile; Standup LP
Adapter Type	InfiniBand HDR100 and Ethernet 100Gb converged adapter
Product Line	HPE HDR InfiniBand Adapters
Product Type	Network adapter
Maximum Data Rate	Up to 100 Gb per port
Sales Part Number	P23666-B21; P23666-H21

Compatible systems

Adapter is intended for HPE ProLiant Gen10 Plus and Gen11 rack servers supporting InfiniBand HDR100 and 100GbE.

Hewlett Packard Enterprise ProLiant
Model: DL365 Gen11; DL385 Gen11; DL325 Gen11 and others
Form factor: Rack server
Generation: Gen10 Plus; Gen11
Listed as compatible with various HPE ProLiant Gen10 Plus and Gen11 servers on the Global One Technology P23666-B21 page.

Best for

HPC clusters
Suitable for high performance computing environments that benefit from InfiniBand HDR100 and Ethernet 100Gb connectivity on a dual-port QSFP56 PCIe4 x16 adapter.
Mixed InfiniBand and Ethernet fabrics
Useful where both InfiniBand HDR100 and Ethernet 100Gb are required, leveraging the dual-port QSFP56 design to support mixed-protocol network topologies.
Data center aggregation
Applicable for data centers that need high bandwidth 100Gb connectivity across two QSFP56 ports on a PCIe 4.0 x16 network adapter.
Server consolidation
Supports scenarios where a single adapter providing dual-port 100Gb QSFP56 connections can streamline network interfaces in dense server deployments.
High-bandwidth storage backends

Details

Shipping, warranty & returns

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Underlying Controller	NVIDIA Mellanox ConnectX-6 VPI MCX653106A-ECAT

Server Compatibility Summary	Selected HPE ProLiant Gen10 Plus and Gen11 servers including DL365 Gen11, DL385 Gen11, DL325 Gen11 and others

Aggregate Bandwidth	Up to 200 Gb per adapter

Networking Ports & Interfaces

Ports	2 ports
Interface	PCI Express 4.0
Connector Type	QSFP56
Port Connector	2 x QSFP56
Host Bus Interface	PCI Express 4.0 x16
Network Interface Types	InfiniBand HDR100; Ethernet 100GbE

HPE Hewlett Packard Enterprise P23666-B21 2-port 100Gb QSFP56 adapter