HP 724205-B21 Ethernet 10Gb 2-Port 544+FLR-SFP+ Adapter — the 724205-B21 is a dual-port 10 Gigabit Ethernet HP FlexibleLOM Rack (FLR) adapter built on Mellanox ConnectX-3 Pro silicon. MPN: 724205-B21. This product IS an HP-branded 10GbE FlexibleLOM mezzanine card with two independent SFP+ cages; it is NOT a standard PCIe slot card, NOT a 40GbE QSFP variant, NOT a VPI/InfiniBand HBA. OEM: HP. Condition: refurbished.
Engineering Context
The 544+FLR-SFP+ 2-port uses the Mellanox ConnectX-3 Pro EN ASIC with two independent 10 Gb/s SFP+ cages, providing up to 20 Gb/s aggregate full-duplex throughput. The host interface is HP FlexibleLOM, electrically equivalent to PCIe Gen3 x8 (8 GT/s per lane), which exactly matches the dual 10G port aggregate. Stateless TCP/UDP/IP offloads, LSO, RSS, VLAN tagging, Mellanox VXLAN/NVGRE hardware encapsulation, and RoCE v1/v2 RDMA are supported. SR-IOV across both ports enables tenant isolation in virtualized hosts. Power draw stays within FLR slot envelope because PCIe and 12 V rails are co-located on the FLR card edge.
Deployment & Use Cases
Drops into the FlexibleLOM slot of HP ProLiant Gen8 and Gen9 rack and tower servers — DL360p Gen8, DL360 Gen9, DL380p Gen8, DL380 Gen9, DL160 Gen9, ML350 Gen9, and DL580 Gen8/Gen9. Common workloads: dual-homed 10GbE iSCSI/NFS storage with active-active multipathing, VMware ESXi vSphere uplinks with LACP teaming, Hyper-V converged networking with VXLAN, Linux KVM with SR-IOV passthrough across both ports, and RoCE-based RDMA targets for small AI/ML and HPC clusters where dual-port redundancy matters.
Technical Specifications
- Brand: HP
- MPN: 724205-B21
- HP Variant Name: Ethernet 10Gb 2-port 544+FLR-SFP+ Adapter
- Chipset: Mellanox ConnectX-3 Pro EN
- Ports: 2x SFP+
- Data Rate: 10 GbE per port (20 Gb/s aggregate)
- Host Interface: HP FlexibleLOM (PCIe Gen3 x8 electrical)
- Form Factor: FLR (FlexibleLOM Rack)
- Offloads: Stateless TCP/UDP/IP, LSO, RSS, VLAN tagging, VXLAN/NVGRE
- RDMA: RoCE v1/v2 capable
- Virtualization: SR-IOV per port
- Condition: Refurbished
Compatibility & Constraints
Designed for HP ProLiant Gen8 and Gen9 servers with a vacant FlexibleLOM slot. NOT compatible with standard PCIe x8/x16 expansion slots — the FLR connector is HP-proprietary. NOT compatible with HPE ProLiant Gen10 servers, which moved to OCP-based mezzanine adapters. NOT a VPI/InfiniBand card — this SKU is fixed to Ethernet operation. PCIe Gen3 x8 host bandwidth (≈64 Gb/s usable) limits combined throughput when both ports are saturated bidirectionally. SFP+ optical or DAC cables sold separately; HP firmware may apply HP/Mellanox transceiver whitelisting on some BIOS levels.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests all 10GbE FlexibleLOM adapters for link-up on each port, port-level traffic forwarding, and PCIe enumeration in a representative HP ProLiant chassis prior to dispatch. Lab-verified stock, 1–3 business day handling, global shipping. Technical consultation available for HP ProLiant Gen8/Gen9 networking refresh projects. Visit tes-itsolutions.com.