Merge pull request #71717 from sjhala-ccs/cnv-30171

CNV#30171: Added note about multi-network policy support

Author: sjhala-ccs

virt/vm_networking/virt-connecting-vm-to-ovn-secondary-network.adoc

@@ -12,6 +12,11 @@ You can connect a virtual machine (VM) to an Open Virtual Network (OVN)-Kubernet
 
 * A localnet topology connects the secondary network to the physical underlay. This enables both east-west cluster traffic and access to services running outside the cluster, but it requires additional configuration of the underlying Open vSwitch (OVS) system on cluster nodes.
 
+[NOTE]
+====
+An OVN-Kubernetes secondary network is compatible with the xref:../../networking/multiple_networks/configuring-additional-network.adoc#compatibility-with-multi-network-policy_configuring-additional-network[multi-network policy API] which provides the `MultiNetworkPolicy` custom resource definition (CRD) to control traffic flow to and from VMs. You can use the `ipBlock` attribute to define network policy ingress and egress rules for specific CIDR blocks.
+====
+
 To configure an OVN-Kubernetes secondary network and attach a VM to that network, perform the following steps:
 
 . xref:../../virt/vm_networking/virt-connecting-vm-to-ovn-secondary-network.adoc#creating-ovn-nad[Configure an OVN-Kubernetes secondary network] by creating a network attachment definition (NAD).