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Start defualt
sudo virsh net-start default
Remove bridge
sudo ifconfig virbr0 dow sudo brctl delbr virbr0
List all
sudo virsh net-list --all
#Simple Bridge Mode Virt-Manager
create it - use gui, or brctl
sudo nano /etc/network/interfaces
auto br1 iface br1 inet dhcp bridge_ports enp3s0 bridge_stp on bridge_fd 0.0