Create bridge for KVM on local workstation

[Nicolas Kovacs <info@microlinux.fr>]

Hi,

I have Debian Trixie with KDE installed on my local HP Z440 workstation.

In the default configuration network is managed by NetworkManager. I 
have a router in my local network, and the workstation is a DHCP client.

# ip -brief -family inet address show
lo               UNKNOWN        127.0.0.1/8
enp3s0           UP             192.168.2.3/24
# nmcli con show
NAME                UUID                                  TYPE      DEVICE
Wired connection 1  bfe0ecbc-1a65-4487-b7d8-5aaa563286ff  ethernet  enp3s0
lo                  3552564c-088e-4907-ad2d-3b285a8439cc  loopback  lo

I'd like to create a br0 bridge with enp3s0 as a bridge slave, so I can 
have virtual machines on this machine connect to the local network.

What's the Debian way of doing this? Create a bridge with NetworkManager 
using nmtui? Edit /etc/network/interfaces or some configuration file 
stub around there?

I'm a long-time Linux user (25 years of experience) but I'm just back 
from a very (!) long break from Debian.

Cheers,

Niki

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