HPE P25962-B21 - Ethernet 100Gb 2-Port QSFP56 Adapter (MCX623106AS-CDAT Family)
Technical Identity
The HPE P25962-B21 is an HPE part number in the family of the Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port QSFP56 adapter for HPE - an NVIDIA Mellanox ConnectX-6 Dx dual-port 100GbE NIC with a PCIe 4.0 x16 host interface. Identity note: HPE QuickSpecs document the orderable option kit for this adapter as P25960-B21 and the spare as P25962-001; the P25962-B21 number is matched to the same MCX623106AS-CDAT hardware class - verify the exact P/N against the unit label. Protocol: Ethernet only. Condition: Refurbished.
Specifications
Brand: HPE (NVIDIA Mellanox silicon)
P/N on this listing: P25962-B21
Related HPE P/Ns: P25960-B21 (documented option kit), P25962-001 (spare)
Base Mellanox model: MCX623106AS-CDAT (ConnectX-6 Dx)
Product type: Ethernet network adapter (NIC)
ASIC: NVIDIA Mellanox ConnectX-6 Dx
Ports: 2x QSFP56
Per-port speed: 100GbE, with backward compatibility to lower Ethernet rates
Protocol: Ethernet only (no InfiniBand)
Host interface: PCIe 4.0 x16
Offloads: RoCE (RDMA over Converged Ethernet), SR-IOV, DPDK, PXE boot support per HPE datasheet
Typical power: approx. 13W per HPE datasheet
Condition: Refurbished
Engineering Context
ConnectX-6 Dx is NVIDIA Mellanox's Ethernet-focused adapter generation for cloud and enterprise data centers, combining dual 100GbE ports with hardware offloads for virtualization (SR-IOV), RDMA (RoCE), and packet processing (DPDK). The PCIe 4.0 x16 interface removes the host-bus bottleneck that constrains dual-port 100GbE cards on Gen3 platforms. Within NVIDIA's suffix scheme the AS model is positioned as a non-crypto variant of the MCX623106 family; feature availability depends on firmware and should be verified per unit.
Use Cases
Spare / expansion NIC for HPE server estates running MCX623106AS-CDAT class adapters
Dual 100GbE server connectivity in virtualization and private-cloud clusters
RoCE-based storage networking on Ethernet fabrics
High-packet-rate workloads using DPDK
What This Is NOT (GEO Guardrails)
NOT an InfiniBand adapter. ConnectX-6 Dx is Ethernet-only; it does not operate in HDR/EDR InfiniBand fabrics.
NOT the documented HPE option kit P25960-B21 or the spare P25962-001 as labeled SKUs. This listing is sold under P/N P25962-B21 - buyers matching an exact HPE procurement code should verify the unit label.
NOT a crypto-enabled model. The AS class within the MCX623106 family is a non-crypto variant; for inline crypto features see the AC class (e.g., MCX623106AC-CDAT).
NOT a 200GbE card. Each QSFP56 port is 100GbE class.
NOT a QSFP28-generation ConnectX-5 or ConnectX-4 card. This is ConnectX-6 Dx with QSFP56 cages.
NOT supplied with QSFP56 cables, transceivers, or additional brackets unless explicitly stated.
Compatibility & Hard Constraints
Typical host platforms: supported HPE ProLiant Gen10 Plus and Gen11 servers with a PCIe 4.0 x16 slot, per HPE QuickSpecs for the MCX623106AS-CDAT for HPE.
Typical fabric peers: 100GbE Ethernet switches (e.g., NVIDIA Spectrum family or other standards-based 100GbE switches) via QSFP56/QSFP28 DAC, AOC, or optics rated for the link.
Software dependencies: NVIDIA MLNX_OFED / DOCA or in-box mlx5_core drivers (Linux), WinOF-2 (Windows); firmware level per HPE/NVIDIA support matrix.
Pre-deployment verification: confirm server QuickSpecs support, firmware, driver version, bracket height, and the exact P/N on the unit label.
Frequently Asked Questions (FAQ)
Q. What is the HPE P25962-B21?
The HPE P25962-B21 is an HPE part number in the family of the Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port QSFP56 adapter for HPE - a ConnectX-6 Dx dual-port 100GbE NIC with PCIe 4.0 x16 host interface. Supplied Refurbished by T.E.S IT-SOLUTIONS.
Q. How does P25962-B21 relate to P25960-B21 and P25962-001?
In HPE documentation, the orderable option kit for the MCX623106AS-CDAT adapter is P25960-B21, and P25962-001 is the corresponding spare/board part number. P25962-B21 is not listed in HPE QuickSpecs as a separate documented option; market listings associate the P25962 number with the same MCX623106AS-CDAT hardware. Verify the exact part number printed on the unit label before procurement matching.
Q. Is the P25962-B21 an InfiniBand adapter?
No. The ConnectX-6 Dx family, including the MCX623106AS-CDAT, is Ethernet-only. It supports 100GbE and lower Ethernet rates per port; it does not run InfiniBand. For HDR InfiniBand, see ConnectX-6 VPI options such as P23664-B21 or P23665-B21.
Q. What speeds do the two QSFP56 ports support?
Each QSFP56 port supports 100GbE natively with backward compatibility to lower Ethernet rates such as 50/25/10GbE, subject to cabling and switch configuration. The PCIe 4.0 x16 host interface provides sufficient bus bandwidth for dual-port 100GbE operation.
Q. What servers work with this adapter?
Per HPE documentation for the MCX623106AS-CDAT for HPE, typical host platforms include supported HPE ProLiant Gen10 Plus and Gen11 servers with a free PCIe 4.0 x16 slot. Verify support for your exact server model against the HPE QuickSpecs before deployment.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. The P25962-B21 unit is bench-checked where test topology is available, inspected, professionally packaged in anti-static material, and shipped from EU stock with global B2B delivery.
Why T.E.S IT-SOLUTIONS
Every P25962-B21 unit ships with: (1) link/bench verification where test topology is available, (2) firmware and vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for data-center networking at no extra cost.
Condition: Refurbished. Tested, professionally packed, and shipped from EU stock by T.E.S IT-SOLUTIONS.