Re: virt-manager and qemu: virtual networking missing
On Sat, 25 Oct 2025 at 19:17, Charles Curley
<charlescurley@charlescurley.com> wrote:
> I did a fresh installation of Debian 13 (trixie), and then tried to
> install what I need for virtual machines:
>
> apt install bridge-utils virt-manager dnsmasq-base
>
> I then try to start the default virtual network, and get an error
> message that the network is already in use by interface wlp1s0. Running
> "ip a" shows only the hardware interfaces and lo. The default network
> is looking for virbr0, which does not exist.
>
> I should also have two new zones for libvirt in firewalld; they are
> absent.
>
> What am I missing?
Hi, maybe have a look at:
https://wiki.debian.org/NetworkConfiguration#Bridging
https://wiki.debian.org/BridgeNetworkConnections
You don't mention that you ran 'brctl' or configured
/etc/network/interfaces , did you do that?
What software is managing your network: ifupdown,
systemd, something else?
(I'm not an expert and I haven't done this for some
time, but maybe it helps)
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