# Allow OpenShift VMs to share the default network

This feature became available in OpenShift 4.14. The current documentation is at https://docs.openshift.com/container-platform/4.15/virt/vm_networking/virt-connecting-vm-to-ovn-secondary-network.html#virt-creating-nad-localnet-console_virt-connecting-vm-to-ovn-secondary-network

:::info
The `physnet` mapping exists by default and maps to the default / primary OpenShift network interface.
:::

# This is a SPECIAL NetworkAttachmentDefinition because it shares the "primary" OpenShift NIC

# You must make three changes to this file
# 1 - choose a name
# 2 - identify the namespace
# 3 - update the "netAttachDefName" line to be namespace/name (e.g. vms/openshift-network)

---
apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
  name: openshift-network
  namespace: johns-namespace
spec:
  config: |2
    {
            "name": "physnet",
            "topology":"localnet",
            "netAttachDefName": "johns-namespace/openshift-network",
            "type": "ovn-k8s-cni-overlay",
            "cniVersion": "0.4.0"
    }