• HPE 817749-B21 Mellanox ConnectX-4 Lx 25Gb SFP28 PCIe card
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HPE

HPE 817749-B21 | 2x 10/25Gb SFP28 | FLR PCIe 3.0 x8 | Mellanox ConnectX-4 Lx (MCX4121A) | SR-IOV, RoCEv2

817749-B21

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Description

Dual-port 10/25GbE SFP28 FLR adapter based on Mellanox ConnectX-4 Lx, optimized for low-latency and high-throughput Ethernet with RDMA over Converged Ethernet (RoCEv2) support. Backward-compatible with 10Gb SFP+ optics and DACs for flexible transitions.

Features

- High-performance dual-port 10/25GbE with low latency
- RDMA capability with RoCEv2 for demanding workloads
- Smooth migration from 10GbE to 25GbE using the same ports
- Broad SFP28/SFP+ optics and DAC/AOC compatibility

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

- Ports: 2x SFP28
- Port speeds: 10/25GbE per port (auto-negotiation)
- Connector type: SFP28 (accepts SFP28 25G and SFP+ 10G modules/cables)
- Form factor: FLR (FlexibleLOM) low-profile PCIe adapter
- Bus interface: PCIe 3.0 x8
- Controller/ASIC: Mellanox ConnectX-4 Lx (MCX4121A)
- Offloads/features: SR-IOV, RoCEv2, RSS, checksum offload, TSO/LRO
- Jumbo frames: up to 9K (typical)
- Cabling: SFP28/SFP+ optical modules or passive/active DAC/AOC (not included)

FAQs

Q: Does it support RDMA/RoCE?
A: Yes. ConnectX-4 Lx supports RoCEv2 for low-latency RDMA over Ethernet.

Q: Can I run 10Gb links today and move to 25Gb later?
A: Yes. Each SFP28 port supports 10Gb (with SFP+) and 25Gb (with SFP28).

Q: Are optics or DAC cables included?
A: No. Transceivers and DAC/AOC cables are sold separately.

Q: Is it compatible with my server?
A: This FLR adapter is intended for supported HPE servers; check the server QuickSpecs for FLR slot support.

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