anchor.diff:  
   Configuration for identity providers has changed for {product-title} 4, including the following notable changes:
   
  -* The request header identity provider in {product-title} 4.5 requires mutual TLS, where in {product-title} 3.11 it did not.
  -* The configuration of the OpenID Connect identity provider was simplified in {product-title} 4.5. It now obtains data, which previously had to specified in {product-title} 3.11, from the provider's `/.well-known/openid-configuration` endpoint.
  +* The request header identity provider in {product-title} 4.6 requires mutual TLS, where in {product-title} 3.11 it did not.
  +* The configuration of the OpenID Connect identity provider was simplified in {product-title} 4.6. It now obtains data, which previously had to specified in {product-title} 3.11, from the provider's `/.well-known/openid-configuration` endpoint.
   
   For more information, see xref:../../authentication/understanding-identity-provider.adoc#understanding-identity-provider[Understanding identity provider configuration].
   
   [id="migration-preparing-monitoring"]
   === Monitoring considerations
   
  -Review the following monitoring changes to consider when transitioning from {product-title} 3.11 to {product-title} 4.5.
  +Review the following monitoring changes to consider when transitioning from {product-title} 3.11 to {product-title} 4.6.
   
   [discrete]
   ==== Alert for monitoring infrastructure availability
  
positive.code: [discrete]
  ==== Unsupported persistent storage options
  
  Support for the following persistent storage options from {product-title} 3.11 has changed in {product-title} 4.5:
  
  * GlusterFS is no longer supported.
  * CephFS as a standalone product is no longer supported.
  * Ceph RBD as a standalone product is no longer supported.
  
  If you used of one these in {product-title} 3.11, you must choose a different persistent storage option for full support in {product-title} 4.5.
  
  For more information, see xref:../../storage/understanding-persistent-storage.adoc#understanding-persistent-storage[Understanding persistent storage].
  
  [id="migration-preparing-networking"]
  === Networking considerations
  
  Review the following networking changes to consider when transitioning from {product-title} 3.11 to {product-title} 4.5.
  
  [discrete]
  ==== Network isolation mode
  
  The default network isolation mode for {product-title} 3.11 was `ovs-subnet`, though users frequently switched to use `ovn-multitenant`. The default network isolation mode for {product-title} 4.5 is now NetworkPolicy.
  
  If your {product-title} 3.11 cluster used the `ovs-subnet` or `ovs-multitenant` mode, it is recommended to switch to the NetworkPolicy mode for your {product-title} 4.5 cluster. NetworkPolicy is supported upstream, is more flexible, and also provides the functionality that `ovs-multitenant` does. If you want to maintain the `ovs-multitenant` behavior while using NetworkPolicy in {product-title} 4.5, follow the steps to xref:../../networking/configuring-networkpolicy.adoc#nw-networkpolicy-multitenant-isolation_configuring-networkpolicy-plugin[configure multitenant isolation using NetworkPolicy].
  
  For more information, see xref:../../networking/configuring-networkpolicy.adoc#nw-networkpolicy-about_configuring-networkpolicy-plugin[About network policy].
  
  [discrete]
  ==== Encrypting traffic between hosts
  
  In {product-title} 3.11, you could use IPsec to encrypt traffic between hosts. {product-title} 4.5 does not support IPsec. It is recommended to use Red Hat OpenShift Service Mesh to enable mutual TLS between services.
  
  ifndef::openshift-origin[]
  For more information, see xref:../../service_mesh/service_mesh_arch/understanding-ossm.adoc#understanding-ossm[Understanding Red Hat OpenShift Service Mesh].
  
negative.code: [id="migration-preparing-logging"]
  === Logging considerations
  
  Review the following logging changes to consider when transitioning from {product-title} 3.11 to {product-title} 4.6.
  
  [discrete]
  ==== Deploying cluster logging
  