• HPE P31246-B21 100GbE QSFP28 PCIe 3.0 x16 network card with green PCB and black heatsinks
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HPE

HPE P31246-B21 | 100GbE 1x QSFP28 | PCIe 3.0 x16 | RoCEv2, SR-IOV, VXLAN/GENEVE | QSFP28 optics/DAC

P31246-B21

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Description

Single-port 100GbE server adapter delivering ultra‑low latency and line‑rate throughput for modern virtualization and storage fabrics. QSFP28 cage supports 100G optics and passive/active DAC for flexible deployments. PCIe 3.0 x16 host interface ensures ample bandwidth for intensive east‑west traffic, with hardware offloads for VXLAN/GENEVE and RoCEv2 to reduce CPU load. Ideal for NVMe‑oF, hyperconverged, and HPC nodes.

Features

- Line‑rate 100GbE on a single QSFP28 port
- PCIe 3.0 x16 bandwidth for uncompromised throughput
- Low latency with RoCEv2 for storage and HPC workloads
- SR‑IOV for high VM density and network isolation
- Hardware offloads for VXLAN/GENEVE to reduce CPU usage
- Flexible media: QSFP28 optics, DAC, or AOC

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Port configuration: 1x 100GbE
- Transceiver interface: QSFP28 (100G)
- Host interface: PCI Express 3.0 x16
- Throughput: up to 100 Gbps line-rate
- Media support: QSFP28 100G optics, DAC/AOC (not included)
- Offloads: RoCEv2, SR-IOV, VXLAN/GENEVE, checksum/TSO/LRO, RSS
- Use cases: NVMe‑oF, virtualization, cloud/HPC fabrics
- OS compatibility: Major Linux, Windows Server, VMware ESXi

FAQs

Q: Which cables or optics are required?
A: Use QSFP28 100G optics (e.g., SR4/LR4) or QSFP28 DAC/AOC according to your required reach.

Q: Does this adapter support virtualization features?
A: Yes. It supports SR-IOV and advanced stateless offloads for overlay networks such as VXLAN and GENEVE.

Q: Is RDMA supported?
A: Yes, RDMA via RoCEv2 is supported to reduce latency and CPU overhead.

Q: Will it work in any PCIe x16 slot?
A: It requires an available PCIe 3.0 (or newer) x16 mechanical slot; check server platform compatibility.

Q: Are optics or cables included in the box?
A: No, transceivers and cables are sold separately.

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