On Sun, 26 Oct 2025 09:39:42 +0100
didier 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.
Hello,
Here (Trixie, Gnome (thus network-manager)) this is still the case:
I run xfce, but I don't think that is significant.
bridge-utils is not installed, dnsmasq-base is installed as a
The lack of bridge-utils is interesting.
dependency of network-manager. Just installing virt-manager was
sufficient to have network in the guests.
Please verify your setup in virt-manager (QEMU/KVM, right click,
details, virtual networks, XML), you should have something like that:
<network>
<name>default</name>
<uuid>849111bd-18c3-4ae2-857b-1a6f2ee88b32</uuid>
<forward mode="nat">
<nat>
<port start="1024" end="65535"/>
</nat>
</forward>
<bridge name="virbr0" stp="on" delay="0"/>
<mac address="52:54:00:cc:c4:91"/>
<ip address="192.168.122.1" netmask="255.255.255.0">
<dhcp>
<range start="192.168.122.2" end="192.168.122.254"/>
</dhcp>
</ip>
</network>
in the "details" tab (instead of the "XML" one) please verify that
the state is active and that automatic start is checked
My setup was automatically created, if that is not the case, you can
create it manually
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.
Thanks.