817749-B21 - Networking Adapters for HPE Server
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817749-B21 Overview
HPE Ethernet 10/25Gb 2-port 640FLR-SFP28 Adapter 817749-B21
Overview
817749-B21 Overview
HPE Ethernet 10/25Gb 2-port FLR-SFP28 MCX4121A-ACFT, Internal, Wired, PCI Express, Ethernet / Fiber, 25000 Mbit/s
817749-B21 is the HPE Ethernet 10/25Gb 2-port 640FLR-SFP28 Adapter. The HPE Ethernet 10/25Gb Adapters are ideal for high performance computing, server virtualization, security, server consolidation, and other applications requiring highest throughput.
Quick Spec
Model | 817749-B21 |
Description | HPE Ethernet 10/25Gb 2-port 640FLR-SFP28 Adapter |
Quick install card | √ |
Product warranty statement | √ |
Low profile bracket | × |
Network Processor | Mellanox ConnectX-4 Lx (MCX4121A-ACAT) |
Data Rate | 2 port, each at 50 Gb bi-directional, 100 Gb bi-directional per adapter |
Bus Type | PCIe 3.0X8 |
Form Factor | FlexibleLOM |
Servers Support | HPE ProLiant DL360 Gen9/Gen10 HPE ProLiant DL380 Gen9/Gen10 HPE Apollo 4200 Gen9 Server HPE ProLiant DL120 Gen10 HPE ProLiant DL160 Gen10 HPE ProLiant DL180 Gen10 HPE ProLiant DL325 Gen10 HPE ProLiant DL385 Gen10 HPE ProLiant DL560 Gen10 HPE ProLiant DL580 Gen10 HPE Apollo 2000 - XL170r Gen10 HPE Apollo 2000 - XL190r Gen10 HPE Apollo 4500 - XL450 Gen10 HPE Apollo 6500 – XL270d Gen10 |
Supported Platforms
SKU | Description |
HPE ProLiant DL380 Gen9 E5-2620v4 2.1GHz 8-core 1P 16GB-R P440ar 8SFF 500W PS Base Server | |
HPE ProLiant DL380 Gen9 E5-2620v4 1P 16GB-R P440ar 8SFF 500W PS Server/S-Buy | |
HPE ProLiant DL380 Gen9 E5-2630v4 2.2GHz 10-core 1P 16GB-R P440ar 8SFF 500W PS Base Server | |
HPE ProLiant DL380 Gen9 E5-2650v4 1P 32GB-R P440ar 8SFF 2x500W PS Server/SB | |
826684-B21 | HPE ProLiant DL380 Gen9 E5-2650v4 2.2GHz 12-core 2P 32GB-R P440ar 8SFF 2x10Gb 2x800W Perf Server |
HPE ProLiant DL380 Gen9 E5-2620v4 1P 16GB-R P840ar 12LFF 2x800W PS Server/S-Buy | |
HPE ProLiant DL380 Gen9 E5-2620v4 2.1GHz 8-core 1P 16GB-R P840ar 12LFF 2x800W PS Base Server | |
HPE ProLiant DL380 Gen9 E5-2609v4 1P 8GB-R H240ar 8SFF 500W PS Server/SB | |
875668-425 | HPE ProLiant DL380 Gen10 4110 1P 16GB-R P408i-a 8SFF 500W DVD PS Server/TV |
875760-S01 | HPE ProLiant DL380 Gen10 4110 1P 16GB-R P408i-a 8SFF 1x500W PS Server/S-Buy |
P06420-B21 | HPE Proliant DL380 Gen10 4110 1P 16GB-R P408i-a 8SFF 500W PS Performance Server |
P05524-B21 | HPE ProLiant DL380 GEN10 4110 1P 16GB-R P408i-a 8SFF 500W RPS SOLUTION SERVER |
P06421-B21 | HPE ProLiant DL380 Gen10 4114 1P 32GB-R P408i-a 8SFF 800W PS Performance Server |
826565-B21 | HPE ProLiant DL380 Gen10 4114 1P 32GB-R P408i-a 8SFF 500W PS Base Server |
875761-S01 | HPE ProLiant DL380 Gen10 5115 1P 16GB-R P408i-a 8SFF 1x500W PS Server/S-Buy |
875759-S01 | HPE ProLiant DL380 Gen10 4112 1P 16GB-R P408i-a 8LFF 1x500W PS Server/S-Buy |
867961-B21 | HPE ProLiant DL360 Gen10 3106 85W 1P 16G-2R S100i 8SFF 1x500W Entry Server |
875838-425 | HPE ProLiant DL360 Gen10 4110 85W 1P 16G-2R P408i-a 8SFF 1x500W Server/TV |
874457-S01 | HPE ProLiant DL360 Gen10 4110 85W 1P 16G-2R P408i-a 8SFF 1x500W Server/S-Buy |
P06453-B21 | HPE ProLiant DL360 Gen10 4110 85W 1P 16G-R P408i-a 8SFF 1x500W PS Performance Server |
P05520-B21 | HPE ProLiant DL360 Gen10 4110 85W 1P 16GB-R P408i-a 8SFF 500W RPS Solution Server |
867962-B21 | HPE ProLiant DL360 Gen10 4114 85W 1P 16G-2R P408i-a 8SFF 1x500W Base Server |
867447-S01 | HPE ProLiant DL360 Gen9 E5-2620v4 1P 16GB-R P440ar 8SFF 500W PS Server/S-Buy |
818208-B21 | HPE ProLiant DL360 Gen9 E5-2630v4 1P 16GB-R P440ar 8SFF 500W PS Base SAS Server |
Compare to Similar Item
Model | 817718-B21 | |
Description | HPE Ethernet 10/25Gb 2-port 640FLR-SFP28 Adapter | HPE Ethernet 10/25Gb 2-port 631SFP28 Adapter |
Quick install card | √ | √ |
Product warranty statement | √ | √ |
Low profile bracket | × | √ |
Network Processor | Mellanox ConnectX-4 Lx (MCX4121A-ACAT) | Broadcom BCM57414 (BCM957414A4142CC) |
Data Rate | 2 port, each at 50 Gb bi-directional, 100 Gb bi-directional per adapter | 2 port, each at 50 Gb bi-directional, 100 Gb bi-directional per adapter |
Bus Type | PCIe 3.0X8 | PCIe 3.0X8 |
Form Factor | FlexibleLOM | Stand up |
Servers Support | HPE ProLiant DL360 Gen9/Gen10 HPE ProLiant DL380 Gen9/Gen10 HPE Apollo 4200 Gen9 Server HPE ProLiant DL120 Gen10 HPE ProLiant DL160 Gen10 HPE ProLiant DL180 Gen10 HPE ProLiant DL325 Gen10 HPE ProLiant DL385 Gen10 HPE ProLiant DL560 Gen10 HPE ProLiant DL580 Gen10 HPE Apollo 2000 - XL170r Gen10 HPE Apollo 2000 - XL190r Gen10 HPE Apollo 4500 - XL450 Gen10 HPE Apollo 6500 – XL270d Gen10 | HPE ProLiant DL360 Gen10 HPE ProLiant DL380 Gen10 HPE ProLiant ML350 Gen10 HPE ProLiant DL120 Gen10 HPE ProLiant DL160 Gen10 HPE ProLiant DL180 Gen10 HPE ProLiant DL325 Gen10 HPE ProLiant DL385 Gen10 HPE ProLiant DL560 Gen10 HPE ProLiant DL580 Gen10 HPE Apollo 2000 - XL170r Gen10 HPE Apollo 2000 - XL190r Gen10 HPE Apollo 4500 - XL450 Gen10 HPE Apollo 6000 - XL230k Gen10 |
Ethernet 10/25Gb 2-port FLR-SFP28 MCX4121A-ACFT Adapter
- Wired
- PCI Express 3.0 Ethernet / Fiber
- 25000 Mbit/s
- Internal Component for: Server
Summary Description
HPE Ethernet 10/25Gb 2-port FLR-SFP28 MCX4121A-ACFT, Internal, Wired, PCI Express, Ethernet / Fiber, 25000 Mbit/s
Need help with 817749-B21?
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Specification
817749-B21 Specification
817749-B21 Specification | |
Capacity | |
Type | Jumbo frame size |
Value | Up to 9.2 KB |
Environmental Parameters | |
Min Operating Temperature | 41 °F |
Max Operating Temperature | 140 °F |
Humidity Range Operating | 8 - 90% |
Header | |
Compatibility | PC, Unix |
Manufacturer | Hewlett-Packard |
Packaged Quantity | 1 |
Product Line | HPE |
Model | 640FLR-SFP28 |
Brand | HPE |
Interface Provided | |
Qty | 2 |
Connector Type | SFP28 |
Type | 25Gb Ethernet |
Miscellaneous | |
Compliant Standards | ACA, BSMI Class A, CISPR 22 Class A, cTUVus, EN 55022 Class A, EN 60950-1, EN55024, FCC Class A certified, ICES-003, RoHS 6/6, VCCI Class A, WHQL |
Networking | |
Type | Network adapter |
Form Factor | Plug-in card |
Connectivity Technology | Wired |
Data Transfer Rate | 25 Gbps |
Data Link Protocol | 10 Gigabit Ethernet, 25 Gigabit Ethernet |
Remote Management Protocol | SNMP |
Compliant Standards | IEEE 1588v2, IEEE 802.1ab (LLDP), IEEE 802.1p, IEEE 802.1Q, IEEE 802.1Qau, IEEE 802.1Qaz, IEEE 802.1Qbb, IEEE 802.1Qbg, IEEE 802.3ad (LACP), IEEE 802.3ae, IEEE 802.3az, IEEE 802.3x |
Status Indicators | Link/activity |
Ports Qty | 2 |
Features | Extended Message-Signaled Interrupts (MSI-X), Full duplex mode, IPv4 support, IPv6 support, Jumbo Frames support, LACP support, Large Send Offload (LSO), LLDP support, Network Virtualization using Generic Routing Encapsulation (NVGRE), PXE support, QoS tagging, Quality of Service (QoS), RDMA over Converged Ethernet (RoCE), RDMA over Converged Ethernet (RoCE) v2, Receive Side Scaling (RSS), T CP Segmentation Offload (TSO), TCP/IP checksum offload, TCP/IP offloading, UDP/IP offloading, UEFI support, Virtual Extensible LAN (VXLAN), VLAN support |
Interface Type | FlexibleLOM |
PCI Specification Revision | PCIe 3.0 |
Performance | |
Type | Bidirectional throughput |
Value | 100 Gbps |
Ports | |
Qty | 2 |
Type | 25 Gigabit Ethernet |
Power Device | |
Power Consumption Operational | 9.7 Watt |
Processor | |
Type | Mellanox ConnectX-4 Lx |
Installed Qty | 1 |
Manufacturer | Mellanox Technologies |
Service | |
Support Details Type | Limited warranty |
Support Details Full Contract Period | 1 year |
Service & Support | |
Type | 1 year warranty |
System Requirements | |
Min Operating System | Citrix XenServer 6.5, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Oracle Solaris 11.1, Red Hat Enterprise Linux 6.6, Red Hat Enterprise Linux 6.7, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7.1, Red Hat Enterprise Linux 7.2, SuSE Linux Enterprise Server 11, SuSE Linux Enterprise Server 12, Ubuntu 14.04, VMware ESXi 5.5, VMware ESXi 6.0 |
Resources
Frequently Asked Questions
What servers are compatible with the HPE 817749-B21 640FLR-SFP28 adapter? +
The HPE 640FLR-SFP28 adapter is designed specifically for HPE ProLiant Gen10 and select Gen9 rack and blade servers that feature a FlexibleLOM slot. This form factor allows for network connectivity without occupying a standard PCIe expansion slot, preserving your physical riser space for other critical hardware upgrades or storage controllers.
Does the 817749-B21 support both 10Gb and 25Gb network environments? +
Yes, this dual-port adapter is highly versatile, supporting both 10GbE and 25GbE speeds via SFP28 transceivers or DAC cables. It provides a seamless migration path for data centers looking to upgrade their bandwidth capacity from legacy 10Gb networks to high-performance 25Gb infrastructures while maintaining backward compatibility with existing 10Gb network switches.
What are the primary performance benefits of using the 640FLR-SFP28 adapter? +
This adapter utilizes the Cavium FastLinQ 41000 series chipset, which provides industry-leading throughput and low latency. It is optimized for high-density virtualization and cloud-scale environments, offering hardware offloads that significantly reduce CPU overhead, thereby ensuring your server applications maintain peak performance even during periods of heavy network traffic.
How does the FlexibleLOM form factor differ from a standard PCIe network card? +
The FlexibleLOM (Flexible LAN-on-Motherboard) design is an HPE-proprietary interface that connects directly to the server motherboard. By utilizing this dedicated slot, the 817749-B21 provides the same high-speed performance as a PCIe card but leaves your standard PCIe slots open for other essential peripherals like GPUs, RAID controllers, or additional fiber channel cards.
Does the HPE 640FLR-SFP28 require specific cabling or transceivers? +
To achieve 25GbE connectivity, you should utilize SFP28-compatible transceivers or direct-attach copper (DAC) cables designed for 25Gb standards. The adapter ports are also compatible with 10GbE SFP+ modules, making it a flexible solution for mixed-speed environments where you may need to connect to both modern leaf switches and legacy 10Gb top-of-rack switches.
Can the 817749-B21 handle advanced virtualization offloading tasks? +
This adapter supports advanced features like Remote Direct Memory Access (RDMA) over Converged Ethernet, specifically RoCE v2. By offloading these memory-to-memory data transfers from the CPU to the network adapter, you can achieve significantly higher efficiency in virtualized environments and high-performance computing clusters compared to standard network interface cards.
What is the typical deployment scenario for this 25Gb network adapter? +
This card is ideal for enterprise data centers running high-performance applications, software-defined storage, or large-scale virtualization clusters. Its dual-port configuration ensures high availability through link aggregation or failover, making it a reliable choice for mission-critical servers that require stable, high-throughput connectivity to the top-of-rack switch fabric.
Is any special firmware or licensing required to manage the 640FLR-SFP28? +
The adapter is managed through standard HPE Integrated Lights-Out (iLO) and common network management utilities. While it benefits from regular firmware updates provided by HPE to ensure optimal interoperability, it does not require additional per-port software licensing to unlock its base connectivity and performance features within your HPE ProLiant ecosystem.
How can I obtain a bulk quote for multiple 817749-B21 units? +
If you are planning an infrastructure refresh or need to outfit a large rack cluster, please reach out to our dedicated sales team via the BuyRouterSwitch.com contact form or email. We specialize in volume orders and can provide customized pricing and lead-time estimates tailored specifically to your project's hardware requirements and quantity needs.
Why should I choose BuyRouterSwitch.com for my HPE hardware procurement? +
BuyRouterSwitch.com is a trusted source for authentic enterprise networking and server hardware. We maintain a rigorous quality control process to ensure that every unit we ship meets the high standards required for critical data center deployments. By choosing us, you gain access to professional expertise and streamlined procurement processes for all your HPE infrastructure components.
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