ifconfig interface creation not working

[dnslc]

I am trying to create a virtual interface.

But I get this error:

localhost$ sudo ifconfig vio0 create
ifconfig: clone_command: Invalid argument
ifconfig: exec_matches: Invalid argument

I am running NetBSD 9.3 with GENERIC kernel.

Is there something I am doing wrong or do I need to do something else before I can create a virtual interface?

Thanks.

[Onauk]

Hello,

According to the ifconfig man page, at runtime you can only create a limited number of interfaces, and vio0 isn't one of them.

     -C      Print the names of all network pseudo-devices that can be created
             dynamically at runtime using ifconfig create.

[jggimi]

I didn't know NetBSD had a vio(4) driver -- I'd thought it used vioif(4) instead. But I'm not a NetBSD user and might be wrong. Either way, virtio(4) devices are made available by a host hypervisor to guest virtual machines, and are discovered during guest kernel boot. They are not pseudo devices.

[dnslc]

Originally Posted by Onauk

Hello,

According to the ifconfig man page, at runtime you can only create a limited number of interfaces, and vio0 isn't one of them.

     -C      Print the names of all network pseudo-devices that can be created
             dynamically at runtime using ifconfig create.

OK thanks for the information.
That command was actually written by Bing AI (how to create virtual interface on NetBSD 9.3)
All its other code has worked just fine for me. I'll start double checking specific device and interface names though from now on.

[Onauk]

Originally Posted by dnslc

OK thanks for the information.

As said by jggimi, I was wrong, virtio(4) devices are not pseudo devices. They are enabled at kernel boot.