Edimax EN-9225TX-E User Manual

[FAQ] How to resolve the failure of EN-9225TX-E to run at 2.5Gbps

in the Linux system installed with RTL8169 driver

Updated: Aug. 05.2020
Document type: Product Installation

Introduction

This FAQ is applied to the below Edimax product.

 EN-9225TX-E

The instructions below will guide you on how to resolve the failure of EN-9225TX-E to run at 2.5Gbps in
the Linux system installed with Realtek Gigabit NIC driver (Chipset RTL8169)

Conditions

In Linux system, the existence of RTL8169 driver will cause the EN-9225TX-E PCIE network adapter not
able to reach its 2.5 Gigabit speed rate but only limit it to 10/100/1000 Mbps maximum due to the fact
that the RTL8169 driver is installed as a default driver for the 2.5G Gigabit Ethernet Adapter by the
system. So, to solve this issue, the RTL8169 driver is necessary to be replaced.
So, install the driver for EN-9225TX-E and then, install the Realtek r8168 driver to replace the RTL8169
driver in the system for the RTL8169 NIC to enable both NICs to work at their original speed rates

(2.5Gbps and 1Gbps) respectively in the same time.

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Before you begin

1. Download the EN-9225TX-E driver with the Linux kernel version shown on Edimax official site, which

your Linux system goes with. Please refer to the link below.

https://www.edimax.com/edimax/download/download/data/edimax/global/download/

2. Insert the EN-9225TX-E NIC into a free PCIE slot in your computer.

3. In Linux system, use the command lspci to see if the RTL8125 2.5GbE NIC can be detected in the

system as shown below.

4. Make sure the required tools, such as gcc, make and the kernel source code have been installed

properly in Linux system.

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