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KVM – create new virtual network

Create new bridge

sudo ip link add <bridge-name> type bridge

Add interface to bridge

sudo ip link set <ethX> up
sudo ip link set <ethX> master <bridge-name>

Add IP address to bridge and bring it up

sudo ip address add dev <bridge-name> 192.168.0.90/24

sudo ip link set dev <bridge-name> up

Create file bridged-network.xml

<network>
    <name>bridged-network</name>
    <forward mode="bridge" />
    <bridge name="<bridge-name>" />
</network>

Add bridged-network to our KVM

sudo virsh net-define bridged-network.xml

Activate network and set autostart

sudo virsh net-start bridged-network 
sudo virsh net-autostart bridged-network

Verify

virsh net-list --all