Merge pull request #234688 from johnmarco/jm-aro-OVN-update

Update OVN article

Author: v-dirichards

.openpublishing.redirection.json

@@ -22538,6 +22538,11 @@
             "redirect_url": "/azure/communication-services/concepts/call-automation/call-recording/bring-your-own-storage",
             "redirect_document_id": false
         },
+        {
+            "source_path_from_root": "/articles/openshift/howto-configure-ovn-kubernetes.md",
+            "redirect_url": "/azure/openshift/concepts-ovn-kubernetes",
+            "redirect_document_id": false
+        },
         {
             "source_path_from_root": "/articles/sentinel/data-connectors/microsoft-defender-threat-intelligence.md",
             "redirect_url": "/azure/sentinel/understand-threat-intelligence",

articles/openshift/concepts-ovn-kubernetes.md

@@ -0,0 +1,35 @@
+---
+title: Overview of OVN-Kubernetes network provider for Azure Red Hat OpenShift clusters
+description: Overview of OVN-Kubernetes network provider for Azure Red Hat OpenShift clusters.
+author: johnmarco
+ms.service: azure-redhat-openshift
+ms.topic: conceptual
+ms.author: johnmarc
+ms.date: 04/17/2023
+topic: how-to
+keywords: azure, openshift, aro, red hat, azure CLI, azure portal, ovn, ovn-kubernetes, CNI, Container Network Interface
+#Customer intent: I need to configure OVN-Kubernetes network provider for Azure Red Hat OpenShift clusters.
+---
+
+# OVN-Kubernetes network provider for Azure Red Hat OpenShift clusters
+
+The OpenShift Container Platform cluster uses a virtualized network for pod and service networks. The OVN-Kubernetes Container Network Interface (CNI) plug-in is a network provider for the default cluster network. OVN-Kubernetes, which is based on the Open Virtual Network (OVN), provides an overlay-based networking implementation. 
+
+A cluster that uses the OVN-Kubernetes network provider also runs Open vSwitch (OVS) on each node. OVN configures OVS on each node to implement the declared network configuration.
+
+## OVN-Kubernetes features
+
+The OVN-Kubernetes CNI cluster network provider offers the following features:
+
+* Uses OVN to manage network traffic flows. OVN is a community developed, vendor-agnostic network virtualization solution.
+* Implements Kubernetes network policy support, including ingress and egress rules.
+* Uses the Generic Network Virtualization Encapsulation (Geneve) protocol rather than the Virtual Extensible LAN (VXLAN) protocol to create an overlay network between nodes.
+
+> [!NOTE]
+> As of ARO 4.11, OVN-Kubernetes is the CNI for all ARO clusters. In already existing clusters, migrating from the previous SDN standard to OVN is not supported.
+
+For more information about OVN-Kubernetes CNI network provider, see [About the OVN-Kubernetes default Container Network Interface (CNI) network provider](https://docs.openshift.com/container-platform/latest/networking/ovn_kubernetes_network_provider/about-ovn-kubernetes.html).
+
+## Recommended content
+
+[Tutorial: Create an Azure Red Hat OpenShift 4 cluster](tutorial-create-cluster.md)

articles/openshift/howto-configure-ovn-kubernetes.md

@@ -34,7 +34,6 @@
           href: howto-gpu-workloads.md
         - name: Segregate worker nodes into subnets
           href: howto-segregate-machinesets.md
-
         - name: Manually update cluster certificates
           href: howto-update-certificates.md
     - name: Networking 
@@ -45,8 +44,6 @@
           href: howto-custom-dns.md
         - name: Configure DNS forwarding
           href: dns-forwarding.md
-        - name: Configure OVN-Kubernetes network provider
-          href: howto-configure-ovn-kubernetes.md
         - name: Restrict egress traffic
           href: howto-restrict-egress.md
     - name: Storage
@@ -112,6 +109,9 @@
       items:
       - name: Overview of egress lockdown
         href: concepts-egress-lockdown.md
+      - name: Overview of OVN-Kubernetes
+        href: concepts-ovn-kubernetes.md
+
 - name: Reference
   items:
     - name: Azure Red Hat OpenShift CLI