Just a simple:

yum remove kmod-r816*

will work, or:

yum remove kmod-r8168 kmod-r8169

Be very careful when removing apps with yum. If the command tries to remove a load of dependencies which don't obviously belong to the apps you want to remove, stop. You can bring your system to its knees. In this case, it won't remove any dependencies.

Nick Howitt wrote:

No. The r8169 is supposed to cover all cards including RTL8169 cards but it does not perform well the an RTL8168 card. The r8169 driver comes in the kernel. The r8168 is supplied by RTL, but for some reason, never gets incorporated in the kernel. The RTL8169 chip is PIC and the RTL818 is PCI-E.

To revert, uninstall both the kmod-r8168 and kmod-r8169 drivers and reboot.

I see.

Is this the right command for that? "yum remove kmod-r8168" and "yum remove kmod-r8169"

ClearOS7 is based on Centos7 so they are very similar and use yum. Think Centos8 moves over to dnf. In ClearOS you run as root user so there is no need to do the "sudo".

No. The r8169 is supposed to cover all cards including RTL8169 cards but it does not perform well the an RTL8168 card. The r8169 driver comes in the kernel. The r8168 is supplied by RTL, but for some reason, never gets incorporated in the kernel. The RTL8169 chip is PIC and the RTL818 is PCI-E.

To revert, uninstall both the kmod-r8168 and kmod-r8169 drivers and reboot.

I have installed the iperf3 upon testing it's working fine.

Does CentOS and ClearOS have the same command?

For example. it's also "yum" in the CentOS.

$ sudo apt install iperf3 #Debian/Ubuntu
$ sudo yum install iperf3 #RHEL/CentOS
$ sudo dnf install iperf3 #Fedora 22+

Nick Howitt wrote:

No the r8169 is not ideal. Install the two I mentioned and reboot and ClearOS will switch to the r8168 driver.

What is the different of r8168 and r8169. The r8169 is much newer right?

If I decide to go back to r8169 can I do that?

No the r8169 is not ideal. Install the two I mentioned and reboot and ClearOS will switch to the r8168 driver.

Nick Howitt wrote:

As a new poster, your first couple of posts get moderated so don't appear immediately.

Yes you need to install it:

yum install iperf3

If your are new to ClearOS, please check if you have an RTL8111/8168/8411 NIC with:

lspci -k | grep Eth -A 3

If you do, don't bother speed testing until you install the better drivers:

yum install kmod-r816*

Then reboot.

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
Subsystem: Gigabyte Technology Co., Ltd Onboard Ethernet
Kernel driver in use: r8169
Kernel modules: r8169
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 02)
Subsystem: ASUSTeK Computer Inc. M3A78 Series Motherboard
Kernel driver in use: r8169
Kernel modules: r8169

Is this correct drivers?