What type of network adapter is the HPE 732455-B21?

The HPE 732455-B21 is a FlexFabric 556FLR-SFP+ network adapter categorized as a 10 GbE solution. It is a dual-port SFP+ adapter that uses a PCIe 3.0 x8 interface. This combination identifies it as a 10 Gigabit Ethernet adapter suitable for environments requiring SFP+ connectivity and modern PCIe 3.0 server slots.

How many ports does the FlexFabric 556FLR-SFP+ adapter provide?

The FlexFabric 556FLR-SFP+ adapter, SKU 732455-B21, is described as a dual-port SFP+ adapter in the 10 GbE category. Dual-port means it offers two SFP+ network connections on a single card. This allows deployment of two separate 10 Gigabit Ethernet links from one adapter for redundancy or traffic separation.

What interface does the HPE FlexFabric 556FLR-SFP+ use to connect to the server?

The HPE FlexFabric 556FLR-SFP+ 732455-B21 is listed under network adapters that use a PCIe 3.0 x8 interface. This defines the physical and electrical connection to the server, ensuring compatibility with systems that support PCIe 3.0 x8 expansion slots while providing sufficient bandwidth for its dual 10 GbE SFP+ ports.

What network speed is supported by the 732455-B21 adapter?

The 732455-B21 FlexFabric 556FLR-SFP+ adapter is categorized as a 10 GbE network adapter. This indicates it is designed for 10 Gigabit Ethernet connectivity on each of its SFP+ ports. Organizations can use it to provide 10 GbE uplinks from servers to switches or other 10 GbE capable network devices.

What type of network media can be used with the 556FLR-SFP+ ports?

The 556FLR-SFP+ adapter is specified as a dual-port SFP+ adapter in the 10 GbE category. SFP+ ports support compatible SFP+ modules or direct attach copper cables selected according to the network design. This gives flexibility in choosing optical or copper 10 GbE media that matches existing switch infrastructure.

732455-B21 - HPE 732455-B21 10GbE dual-port SFP+ network adapter

Name: HPE 732455-B21 10GbE dual-port SFP+ network adapter
Brand: HPE
SKU: 732455-B21

732455-B21 - HPE 732455-B21 10GbE dual-port SFP+ network adapter | US IT Hardware

Product overview

The HPE FlexFabric 556FLR-SFP+ adapter, SKU 732455-B21, is a dual-port 10 Gigabit Ethernet network adapter designed for environments standardizing on SFP+ connectivity. Positioned in the 10 GbE category, it provides two SFP+ network ports for flexible optical or direct attach copper connections, depending on the selected transceivers or cables. This adapter is built for a PCIe 3.0 x8 interface, aligning with modern server expansion standards and ensuring compatibility with platforms that support PCIe 3.0. As part of HPE’s FlexFabric family, the 556FLR-SFP+ is suited for data center and enterprise deployments that require 10 GbE bandwidth and SFP+ media options. The adapter’s dual-port configuration helps support network redundancy or traffic segmentation across separate 10 GbE links. This makes the 732455-B21 a focused choice for organizations that need 10 GbE SFP+ connectivity through a PCIe 3.0 x8 network adapter form factor.

Dual-port SFP+ 10 GbE network adapter
PCIe 3.0 x8 server expansion interface
HPE FlexFabric 556FLR-SFP+ model
SKU 732455-B21 for precise identification
Designed for 10 Gigabit Ethernet networks
Supports SFP+ based connectivity options

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	732455-B21
Brand	HPE
Condition	New
Model	556FLR-SFP+
Processor	Emulex controller
Technology	10 GbE
Device Type	Network adapter
Form Factor	FlexibleLOM
PXE Support	Preboot eXecution Environment (PXE) boot support
ACPI Support	ACPI 1.1 power management compliant
FCoE Support	Fibre Channel over Ethernet (FCoE) capable

Compatible systems

HPE FlexibleLOM dual-port 10 GbE adapter for ProLiant Gen9 systems.

HPE ProLiant
Model: DL360 Gen9, DL380 Gen9
Form factor: FlexibleLOM
Generation: Gen9
Listed by retailer source as compatible with these systems.

Best for

Data center 10 GbE
Suitable for data center environments standardizing on 10 Gigabit Ethernet, leveraging the dual-port 10 GbE capability and PCIe 3.0 x8 interface for server connectivity.
Server network interface
Fits servers that require a PCIe 3.0 x8 network adapter, providing dual SFP+ ports for 10 GbE links to aggregation or core switches.
SFP+ based network designs
Ideal for infrastructures built around SFP+ optics or DAC cables, using the dual-port SFP+ 10 GbE design for flexible media options.
Redundant 10 GbE connections
Supports scenarios that require two separate 10 GbE SFP+ connections from a single adapter, enabling link redundancy or segmented traffic paths.
Consolidated network I/O
Useful when consolidating multiple network connections into fewer 10 GbE links, using the dual 10 GbE SFP+ ports over a PCIe 3.0 x8 interface.

Details

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Product Line	FlexFabric

Product Type	Network Adapter

Onboard Memory	128 MB

Tunnel Offload	VXLAN and NVGRE tunnel offload support

Auto-Negotiation	Supported

Link Aggregation	Supported (IEEE 802.3ad LACP)

Priority-Based QoS	Supported (IEEE 802.1p)

Jumbo Frame Support	Supported

Converged I/O Support	Converges Ethernet and FCoE

Congestion Notification	Supported (IEEE 802.1Qau)

Connectivity Technology	Wired

Advanced Storage Offload	Advanced storage offload processing

IEEE 802.1Q VLAN Tagging	Supported (IEEE 802.1Q)

Large Send Offload (LSO)	Supported

OS Compatibility (Linux)	Red Hat Enterprise Linux 5.x, Red Hat Enterprise Linux 6, SuSE Linux Enterprise Server 10, SuSE Linux Enterprise Server 11

OS Compatibility (VMware)	VMware ESX 4.0, VMware ESX 4.1

PCI Specification Revision	PCIe 3.0

Receive Side Scaling (RSS)	Supported

OS Compatibility (Oracle Solaris)	Oracle Solaris 11.2 to Oracle Solaris 11.4

OS Compatibility (Microsoft Windows)	Windows Server 2008, Windows Server 2008 R2, Windows HPC Server 2008

Nominal Data Transfer Rate	10 Gbps per Ethernet port
Aggregate Theoretical Bandwidth	40 Gb/s bi-directional theoretical bandwidth per adapter

Networking Ports & Interfaces

Port Type	SFP+
Ethernet Ports	2
Host Interface	PCI Express 3.0 x8
Interface Type	PCIe 3.0 x8
Wake-on-LAN (WOL)	Supported
Data Link Protocol	10 Gigabit Ethernet
Per-Port Data Rate	20 Gb/s bi-directional per port
Port Configuration	2 SFP+ ports
Energy Efficient Ethernet	Supported (IEEE 802.3az)
Backplane Ethernet Standard	IEEE 802.3ap
10 Gigabit Ethernet Standard	IEEE 802.3ae 10 Gigabit Ethernet over fiber
Overlay Network Tunneling Support	VXLAN and NVGRE tunnel offload

HPE 732455-B21 10GbE dual-port SFP+ network adapter