HP 700699-B21 Ethernet 10GB 2-Port 561FLR-T Adapter — main product image

HP 700699-B21 Ethernet 10GB 2-Port 561FLR-T Adapter

HP 700699-B21 Ethernet 10GB 2-Port 561FLR-T Adapter

Name: HP 700699-B21 Ethernet 10GB 2-Port 561FLR-T Adapter
Brand: HP
SKU: 700699-B21 ETHERNET

★★★★★5.0 (2 reviews)

HP 561FLR-T dual-port 10GbE adapter with Intel X540 delivers high-bandwidth server connectivity for ProLiant environments.

$30.00*

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The HP 700699-B21 Ethernet 10Gb 2-Port 561FLR-T Adapter is a FlexibleLOM network adapter built for HP ProLiant servers that require high-speed 10 Gigabit Ethernet connectivity. Powered by the Intel X540 controller, it provides two independent 10GbE copper ports over a PCIe v2.1 Gen 2 x8 bus interface. The FlexibleLOM design installs in a dedicated slot on compatible ProLiant servers, preserving standard PCIe expansion slots for storage controllers, GPUs, or other add-in cards.

The adapter supports a comprehensive set of networking standards including IEEE 802.3ad link aggregation, 802.1Qaz Enhanced Transmission Selection, 802.1Qau Congestion Notification, and 802.1Qbb Priority-based Flow Control — features that are critical for Data Center Bridging and converged network environments. Operating system support covers Windows Server 2008 and 2012 variants, Red Hat Enterprise Linux 5.7 through 6.3, SUSE Linux Enterprise Server 10 and 11, Solaris 10 and 11, VMware vSphere 4.1 and 5.0, and Citrix XenServer 6.0 and 6.1. For ProLiant deployments needing reliable, high-throughput networking with failover capability, the 561FLR-T is a well-proven solution.

Key Features

More for the money with this high quality Product

Offers premium quality at outstanding saving

Excellent product

100% satisfaction

Specifications

Brand

Model

700699-B21

Type

Ethernet 10Gb 2-Port Adapter (FlexibleLOM)

Network Controller

Intel X540

Ports

2x 10GbE (10GBASE-T)

Bus Type

PCIe v2.1 (Gen 2) x8

Server Compatibility

HP ProLiant (FlexibleLOM slot)

IEEE Compliance

802.3, 802.3x, 802.3ad, 802.1Qaz, 802.1Qau, 802.1Qbb, 802.1ax

Supported OS

Windows Server 2008/2012, RHEL 5.7–6.3, SLES 10/11, Solaris 10/11, VMware vSphere 4.1/5.0, Citrix XenServer 6.0/6.1

Pros & Cons

👍 Pros

Dual 10GbE ports provide high-bandwidth connectivity with redundancy from a single adapter
Intel X540 controller offers mature driver support and proven reliability
FlexibleLOM form factor keeps PCIe expansion slots free for other cards
Supports link aggregation, flow control, and Data Center Bridging standards
Broad OS compatibility spanning Windows, Linux, Solaris, VMware, and Citrix

👎 Cons

FLR form factor limits compatibility to ProLiant servers with a FlexibleLOM slot
PCIe v2.1 Gen 2 x8 bus may bottleneck under sustained dual-port 10GbE line-rate traffic
Operating system support list skews toward older releases and may require manual driver updates for newer OS versions
10GBASE-T copper requires Cat6a cabling for full 10GbE speeds at distances beyond 55 meters

Frequently Asked Questions

What servers is this adapter compatible with?

The 561FLR-T is designed for HP ProLiant servers that support the FlexibleLOM (FLR) form factor. It installs in the dedicated FLR slot, not a standard PCIe expansion slot.

Does this adapter support link aggregation?

Yes. It is IEEE 802.3ad and 802.1ax compliant, supporting Link Aggregation Control Protocol (LACP) for bonding both ports to increase throughput and redundancy.

What network controller does this adapter use?

It uses the Intel X540 controller, a well-established chipset for 10GbE networking with broad OS driver support.

Can both 10GbE ports be used simultaneously?

Yes. Both ports operate independently, allowing you to run two separate 10GbE connections or bond them together for up to 20 Gbps aggregate bandwidth.

What operating systems are supported?

Supported operating systems include Windows Server 2008/2012, RHEL 5.7–6.3, SLES 10/11, Solaris 10/11, VMware vSphere 4.1/5.0, and Citrix XenServer 6.0/6.1.