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Re: virt-manager and qemu: virtual networking missing



On Sun, 26 Oct 2025 at 16:13, Charles Curley
<charlescurley@charlescurley.com> wrote:
> On Sun, 26 Oct 2025 09:39:42 +0100didier gaumet <didier.gaumet@gmail.com> wrote:
> > Le 26/10/2025 à 02:11, Charles Curley a écrit :

> > > In the past installing virt manager was sufficient; the virtual
> > > network Just Worked. Not so now.

[...]

> I have the default network, XML and all, as you describe. What I don't
> have is the interface virbr0 for the default network to use. What I
> need to know is how to set the interface virbr0 up.

Maybe you'll find something useful in these detailed instructions for
nmcli [1][2] or nmtui [3].

I see that [3] says: "Note that a bridge cannot be established
over Wi-Fi networks operating in Ad-Hoc or Infrastructure modes."
... not sure exactly what that means or if it affects your situation.

Lots of moving parts here: distro packaging differences, multiple
network management schemes, libvirt changes. My network
competence is very low, I hope I'm not adding too much noise
to the thread, I'm just here hoping to learn from how you solve it.

[1] https://gist.github.com/plembo/f7abd2d9b6f76e7afdece02dae7e5097
[2] https://gist.github.com/plembo/a7b69f92953a76ab2d06533754b5e2bb
[3] https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/networking_guide/ch-configure_network_bridging


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