Add and remove network interfaces
 

How do I add or remove network interfaces on OpenSUSE 42.2?

Hard to say in a general term.

In any linux there are some things that need to happen to get a nic working.

One is hardware support. Usually built into kernel or added to or use of ndiswrapper.

Two is tcp/ip settings via either command line or network manager possibly yast(2).

Three might be basic motherboard support.

Explain more of what you have or want to do. OpenSuse website has a great wealth of information on how to use OpenSuse.

This sounds very familiar; did none of the many answers you've received before help????

http://www.linuxquestions.org/questi...gs-4175605993/
http://www.linuxquestions.org/questi...rk-4175606297/
http://www.linuxquestions.org/questi...ms-4175605946/

Again,as jefro said, the openSUSE site has ample documentation, but please (again), read the "Question Guidelines" link in my posting signature. Great that you tell us the version/distro, but you leave everything else out, like the desktop UI (Gnome? KDE? XFCE? Other?), how you're configuring your network (wicked? Network Manager? Command line?), or even if it's a virtual machine or not (because you've hinted at it several times before).

Short answer: Shut down your machine, add the new network hardware, and turn it back on. Configure it as you would any other network device.
Longer answer: Too many variables unknown, because you've seemingly not taken any of the advice you've been given previously, and tried to work with it, don't tell us what you're trying to accomplish, or what you've already done/tried.

I use KDE Desktop. Physical machine(Ethernet, Wi-Fi. Though I have used QEMU/KVM and virbr0 and even virbr0-nic are made. How do I remove virbr0-nic?). How do I add br0 with the default settings?

I'm still confused.

Are you working on an OpenSuse virtual machine client? Don't be shy with the entire scope of the question here.