Brand: HPE | Category: Network Adapters & NICs
SKU: HPE-817721-B21 | Part #: 817721-B21 | MPN: 817721-B21
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The dual-port 10GbE HPE Ethernet 10Gb 2-port 535FLR-T Adapter (part number 817721-B21) delivers high-speed connectivity for enterprise data centers requiring flexible network expansion. Built on the Intel X540 controller and housed in a FlexibleLOM form factor, this adapter slots directly into compatible HPE ProLiant servers, eliminating the need for dedicated PCIe slots while maintaining full 10GBASE-T performance over Cat6a cabling. With support for auto-negotiation across 100Mbps, 1Gbps, and 10Gbps data rates, the HPE 817721-B21 adapts seamlessly to existing infrastructure investments.
Network engineers and IT procurement teams will appreciate the comprehensive offload engine suite—including TCP/UDP/IP checksum offload, Large Send Offload (LSO), and Receive-Side Scaling (RSS)—which reduces CPU overhead and boosts application throughput. The adapter supports IEEE 802.1Q VLAN segmentation (up to 4096 VLANs), IEEE 802.3ad LACP for link aggregation, and SR-IOV and VMDq virtualization modes, making it ideal for multi-tenant environments. Wake-on-LAN capability and integrated HPE iLO management integration streamline remote administration. Regulatory certifications include CE, FCC, and RoHS compliance. HPE officially supports this adapter across ProLiant Gen9 servers (BL, DL, ML series with FlexibleLOM slots) and major operating systems including Windows Server 2008 R2, 2012, and 2012 R2, as well as Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and VMware ESXi.
Contact Omnixon Global to discuss your HPE 817721-B21 networking requirements and request an RFQ today.
| Brand | HPE |
| Category | Network Adapters & NICs |
| SKU | HPE-817721-B21 |
| Part Number | 817721-B21 |
| Condition | New |
| Capacity | 10GB |
| Form Factor | FlexibleLOM |
| Interface | Ethernet 10 Gb |
| Speed | 10 Gb/s per port |
| Manufacturer Part Number | 817721-B21 |
| Product Name | HPE Ethernet 10Gb 2-port 535FLR-T Adapter |
| Form Factor | FlexibleLOM (FLR) |
| Number of Ports | 2 |
| Port Speed | 10GbE per port |
| Interface Type | 10GBASE-T (RJ-45 copper) |
| Controller | Intel X540 |
| Cable Type | Cat6a (minimum) for 10GbE; Cat5e/Cat6 for 1GbE fallback |
| Bus Interface | PCIe 2.1 x8 (via FlexibleLOM slot) |
| Supported Data Rates | 100Mbps / 1Gbps / 10Gbps (auto-negotiation) |
| Virtualization Support | SR-IOV, VMDq |
| Offload Engines | TCP/UDP/IP checksum offload, Large Send Offload (LSO), Receive-Side Scaling (RSS) |
| VLAN Support | IEEE 802.1Q (up to 4096 VLANs) |
| Link Aggregation | IEEE 802.3ad LACP |
| Wake-on-LAN | Supported |
| Operating System Support | Windows Server 2008 R2 / 2012 / 2012 R2, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi |
| Compatible Server Platforms | HPE ProLiant Gen9 (BL, DL, ML series with FlexibleLOM slot) |
| Management Integration | HPE iLO, HPE OneSign |
| Regulatory Compliance | CE, FCC, RoHS |
The HPE 817721-B21 - HPE Ethernet 10Gb 2-port 535FLR-T Adapter is enterprise networking hardware for data-center, campus, and branch deployments. Common roles include core/distribution switching, server uplinks, top-of-rack fabric, and edge connectivity in mixed Cisco/Juniper/Arista environments.
Key specifications for the HPE 817721-B21 - HPE Ethernet 10Gb 2-port 535FLR-T Adapter: form factor FlexibleLOM; interface Ethernet 10 Gb; 1 year manufacturer support; new condition. Manufacturer part number 817721-B21. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
The HPE 817721-B21 - HPE Ethernet 10Gb 2-port 535FLR-T Adapter interoperates with standard switching protocols (LACP, MLAG/VPC, 802.1Q, OSPF/BGP). For specific cross-vendor scenarios — Cisco-to-Arista MLAG peering, fabric integration with Cumulus/SONiC, or migration from legacy Catalyst — our network engineers map a compatibility plan as part of the RFQ.