qemu-system-x86_64: warning: hub 0 with no nics

[alex1452]

Dear all,

I cannot get networking to work with qemu. I have on my computer a bridge 
br-lan with DHCP that I already use for LXC container and WIFI clients. I would 
like to have my KVM containers join this bridge, so that they can get an 
192.168.1.x IP-address.

>From reading various blogs, I used the following command line:

qemu-system-x86_64 -enable-kvm -cpu host -smp 4 -m 1G \
-drive 
file=/mnt/data/share/internal/debian10.qcow2,if=virtio,copy-on-read=on,if=virtio,format=qcow2
 \
-cdrom /mnt/data/share/internal/firmware-10.1.0-amd64-netinst.iso \
-device virtio-net-pci,mac=E2:F2:6A:01:9D:C9,netdev=br0 -netdev 
bridge,br=br-lan,id=br0 \
-usb -device usb-tablet -net user,smb=$HOME -vnc 0.0.0.0:1 -k de

Unfortunately I get the following error:
qemu-system-x86_64: warning: hub 0 with no nics

What am I doing wrong? Any help would be greatly appreciated!

Thank you,
Alex