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817721-B21 ✓ Verified by PartsTable
HP · NETWORK · 10GBE_NIC
WHAT YOU NEED TO KNOW
RJ45 = copper (needs CAT6) | SFP+ = fiber (needs transceiver) FLR = FlexibleLOM (HPE integrated) — NOT standard PCIe
Bracket height MUST match chassis — Full Height (2U) vs Low Profile (1U)
PRODUCT OVERVIEW
HP ETHERNET 10GB 2-PORT FLR-T BCM57416 ADAPTER

HP ETHERNET 10GB 2-PORT FLR-T BCM57416 ADAPTER. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
NETWORK→ 10GBE_NIC→ 817721-B21
SPECIFICATIONS
Part Number817721-B21
ManufacturerHP
Capacity10GB
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN 817721-B21 MFR HP HP Ethernet 10GB 2-Port Flr-T BCM57416 A
KEY FEATURES
•
10GB Capacity
TYPICAL APPLICATIONS
  • Data center top-of-rack switching
  • High-speed server interconnects (10G/25G/40G/100G)
  • Storage network fabric (iSCSI, FCoE)
  • Campus and branch network infrastructure
  • Firewall and security appliance connectivity
  • WAN edge and SD-WAN deployments
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
854177-001Compatible
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416)
compatible
817719-001Compatible
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416)
compatible
817722-B21Compatible
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416) FIO
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
817719-001SUBSTITUTE
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416)
HPE
817722-B21SUBSTITUTE
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416)
HPE
854177-001SUBSTITUTE
HP NIC 535FLR-T 10GbE RJ-45 2-Port PCI-E-3.0x8 Ethernet Controller (Broadcom BCM57416)
HPE
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FREQUENTLY ASKED QUESTIONS
What is 817721-B21?
817721-B21 is a HP Ethernet 10GB 2-Port Flr-T BCM57416 Adapter manufactured by HP. It is classified as a NETWORK (10GBE_NIC).
What parts can replace 817721-B21?
There are 3 known substitutes for 817721-B21: 854177-001, 817719-001, 817722-B21. Substitute compatibility should be verified for your specific system.
Is 817721-B21 still available?
817721-B21 is currently Unknown.
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Last verified: July 2026