OSDOCS-14387:RN for localnet

Author: JoeAldinger

release_notes/ocp-4-19-release-notes.adoc

@@ -502,6 +502,11 @@ For more information, see xref:../networking/ptp/about-ptp.adoc#ptp-dual-ports-o
 ==== Enabling DPU device management with the DPU Operator
 With this release, {product-title} introduces the Data Processing Unit (DPU) Operator, enabling management of DPU devices. The DPU Operator manages components on compute nodes with DPUs, enabling the offloading of data workloads such as networking, storage, and security. This leads to improved cluster performance, reduced latency, and enhanced security, contributing to a more efficient infrastructure. For more information, see xref:../networking/networking_operators/dpu-operator/about-dpu.adoc#about-dpu-and-dpu-operator[About DPU and the DPU Operator].
 
+[id="ocp-4-19-cluster-user-defined-networks-localnet_{context}"]
+==== Localnet topology for user-defined networks (Generally Available)
+
+Administrators can now use the `ClusterUserDefinedNetwork` custom resource to deploy secondary networks on a `Localnet` topology. This feature allows pods and virtual machines connected to the localnet network to egress to the physical network. For more information, see xref:../networking/multiple_networks/primary_networks/about-user-defined-networks.adoc#nw-cudn-localnet[Creating a ClusterUserDefinedNetwork CR for a Localnet topology].
+
 [id="ocp-release-notes-nodes_{context}"]
 === Nodes