8.7.

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
  name: l2-network
  namespace: my-namespace
spec:
  config: |2
    {
            "cniVersion": "0.3.1", 

            "name": "my-namespace-l2-network", 

            "type": "ovn-k8s-cni-overlay", 

            "topology":"layer2", 

            "mtu": 1400, 

            "netAttachDefName": "my-namespace/l2-network" 

    }

$ oc apply -f <filename>.yaml

apiVersion: nmstate.io/v1
kind: NodeNetworkConfigurationPolicy
metadata:
  name: mapping 

spec:
  nodeSelector:
    node-role.kubernetes.io/worker: '' 

  desiredState:
    ovn:
      bridge-mappings:
      - localnet: localnet-network 

        bridge: br-ex 

        state: present 

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
  name: localnet-network
  namespace: default
spec:
  config: |2
    {
            "cniVersion": "0.3.1", 

            "name": "localnet-network", 

            "type": "ovn-k8s-cni-overlay", 

            "topology": "localnet", 

            "mtu": 1500, 

            "vlanID": 200, 

            "netAttachDefName": "default/localnet-network" 

    }

$ oc apply -f <filename>.yaml

apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  name: vm-server
spec:
  running: true
  template:
    spec:
      domain:
        devices:
          interfaces:
          - name: secondary 

            bridge: {}
        resources:
          requests:
            memory: 1024Mi
      networks:
      - name: secondary  

        multus:
          networkName: <nad_name> 

# ...

$ oc apply -f <filename>.yaml