Detailed Specifications
HPE 817748-B21 Ethernet 10/25Gb 2-Port 640FLR-SFP28 Adapter
Overview
The HPE 817748-B21 is a high-speed server network adapter designed for HPE ProLiant servers, offering two SFP28 ports capable of operating at 10 or 25 Gb/s. It supports 25 Gb Ethernet and full-feature networking offloads, making it suitable for virtualization, data-center, or cloud infrastructure where bandwidth and efficiency are critical. The adapter is provided in a FlexLOM form factor for direct motherboard integration in supported server platforms and supports standard LAN features along with newer overlay and RDMA offloads.
Key Features
Dual SFP28 ports supporting 10 Gb and 25 Gb speeds
FlexLOM form factor for compact integration in HPE servers
PCIe 3.0 interface delivering up to 100 Gb/s bi-directional aggregate bandwidth
Supports virtualization and overlay networking offloads (VXLAN, NVGRE, RoCE)
Full protocol offload support including TSO, RSS, LSO, and jumbo frames
Technical Specifications
| Specification | Details |
|---|
| Brand | HPE |
| Part Number | 817748-B21 |
| Product Type | Ethernet Adapter (10/25 Gb) |
| Network Ports | 2 × SFP28 |
| Supported Speeds | 10 Gb/s, 25 Gb/s |
| Host Interface | FlexLOM / PCIe 3.0 |
| Aggregate Bandwidth | Up to 100 Gb/s bi-directional |
| Jumbo Frame Support | Up to 9.2 KB |
| Offload Features | TSO, LSO, RSS, TCP/UDP checksum, VXLAN, NVGRE, RoCE v2 |
| Standards Support | IEEE 802.1Q, IEEE 802.3ae, 802.3ad, 802.1AB, IEEE 802.3az |
| Compatibility | HPE ProLiant servers with FlexLOM slot |
| Form Factor | Plug-in FlexLOM adapter |
| Typical Weight | ~0.55 kg (approx. 1.2 lb) |
