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Refurbished HPE FlexFabric 10Gb 2-port 536FLB FIO switch module, FlexibleLOM card with two ports

HPE

HPE 766491-B21 FlexFabric 10Gb 2-port 536FLB FIO switch module

SKU CH-2R4G-HC0ET MPN 766491-B21

Adds dual 10 Gb Ethernet ports via PCIe 3.0 x8 to BladeSystem c-Class Gen9 servers with FlexibleLOM form factor

  • Two 10 Gb ports deliver high-throughput Ethernet connectivity
  • FlexibleLOM form factor fits BladeSystem c-Class Gen9 servers without extra slots
  • Single-chip design lowers power draw for dual-port 10 Gb operation
  • Virtual Connect FlexFabric support splits each port into four physical NICs
  • PCI Express 3.0 x8 host interface provides full-duplex bandwidth

HPE FlexFabric 536FLB 10Gb adapter

This refurbished HPE FlexFabric 10Gb 2-port 536FLB FIO adapter provides dual 10Gb Ethernet connectivity on a FlexibleLOM form factor. It is designed for HP BladeSystem c-Class Gen9 servers. The single-chip solution reduces power requirements while delivering full-duplex performance. Virtual Connect FlexFabric technology allows each port to be divided into four physical NICs for virtualised workloads.

FIO slot installation and common issues

Installation uses the dedicated FlexibleLOM slot inside the blade chassis, requiring no extra cabling for the network ports. The module seats directly into the server backplane. Common issues include firmware mismatches between the adapter and the Virtual Connect modules. Ensure the blade server BIOS and iLO are updated before fitting the card to avoid detection failures.

Compatibility checks before ordering

Verify that the target blade is a supported HP BladeSystem c-Class Gen9 model with an available FlexibleLOM bay. Confirm the enclosure uses Virtual Connect FlexFabric interconnect modules to enable the NIC partitioning feature. Check that the server operating system and hypervisor have current drivers for the 536FLB controller. Without the correct interconnect, the adapter will not pass traffic.

Highlights

  • Two 10 Gb ports deliver high-throughput Ethernet connectivity
  • FlexibleLOM form factor fits BladeSystem c-Class Gen9 servers without extra slots
  • Single-chip design lowers power draw for dual-port 10 Gb operation
  • Virtual Connect FlexFabric support splits each port into four physical NICs
  • PCI Express 3.0 x8 host interface provides full-duplex bandwidth

Specifications

BrandHPE
Shipping weight0.91 kg
Package size152 × 102 × 51 mm

Questions about this item

How do I confirm the FlexFabric 536FLB is linked at 10Gb on both ports after install?

Check the server BIOS or OS network settings; each port should show a 10Gb full-duplex link with PCI Express 3.0 x8 width.

What ships with the 766491-B21 and what must I source separately?

The module itself is supplied; SFP+ transceivers and compatible cabling for the two 10Gb ports are not included.

Which version of the 536FLB fits an HP BladeSystem c-Class Gen9 bay?

The FIO FlexibleLOM form factor of this 766491-B21 is built for Gen9 blade server slots.

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