P21106-B21 - HPE 1GbE 4p BASE-T I350-T4 Adapter

HPE P21106-B21 — 1GbE 4-Port BASE-T I350-T4 Adapter

What it is

P21106-B21 is an HPE enterprise Ethernet network adapter designed for HPE ProLiant servers.
It’s a 4-port 1GbE BASE-T adapter based on the Intel I350-T4 controller, delivering reliable copper networking for general-purpose, management, and data traffic.

Why buyers pick P21106-B21 (plain English)

Four Gigabit ports in one card
Supports up to four independent 1Gb Ethernet links — great for redundancy, VLAN segmentation, or multiple network zones.

Intel I350 silicon
Proven Ethernet controller with broad OS and hypervisor support and solid performance with low CPU overhead.

Flexible connectivity
RJ-45 copper ports work with standard Ethernet cabling (Cat5e/Cat6/Cat6a) — no optics required.

ProLiant-validated reliability
HPE-qualified driver and firmware support ensures predictable behavior in server environments.

Ideal for classic networking
Perfect for legacy connections, management networks, and general data traffic in enterprise servers.

60-second spec box (P21106-B21)

Adapter type
Ethernet network adapter

Ports
4 × 1GbE BASE-T (RJ-45)

Speed
1GbE

Controller
Intel I350-T4

Form factor
PCIe stand-up adapter

Host interface
PCIe Gen3

Media supported
Copper Ethernet

Platform
HPE ProLiant servers

Use case
General server networking, VLAN separation, redundant uplinks, management traffic.

Where it fits (and when to choose something else)

Perfect for:

• ProLiant servers needing multiple 1GbE links

• Management and backup network segments

• Link aggregation and redundancy

• Virtualization environments with moderate network needs

Choose something else if:

• You need higher speeds → 10Gb/25Gb NICs

• You need fiber connectivity → SFP/SFP+ adapters

• You want to preserve PCIe slots → FlexibleLOM/OCP adapters

TL;DR

P21106-B21 is HPE’s 4-port 1GbE BASE-T I350-T4 adapter:
a reliable, server-validated NIC delivering flexible and redundant Gigabit Ethernet connectivity for enterprise workloads.