Updates DNS example

Author: Steven Smith

modules/virt-example-nmstate-IP-management.adoc

@@ -98,14 +98,38 @@ By default, the `nmstate` API stores DNS values globally as against storing them
 Setting a DNS configuration is comparable to modifying the `/etc/resolv.conf` file.
 ====
 
-The following examples show situations that require configuring a network interface to store DNS values:
-
 [IMPORTANT]
 ====
 You cannot use `br-ex` bridge, an OVNKubernetes-managed Open vSwitch bridge, as the interface when configuring DNS resolvers.
 ====
 
-* Configure a static DNS for a network interface with an automatic IP configuration. Note that for this configuration, you must set the `auto-dns` parameter to `false`, so that the Kubernetes NMState Operator can store custom DNS settings for the network interface.
+The following example shows a default situation that stores DNS values globally:
+
+* Configure a static DNS without a network interface. Note that when updating the `/etc/resolv.conf` file on a host node, you do not need to specify an interface (IPv4 or IPv6) in the `NodeNetworkConfigurationPolicy` (NNCP) manifest.
++
+[source,yaml]
+----
+apiVersion: nmstate.io/v1
+kind: NodeNetworkConfigurationPolicy
+metadata:
+ name: worker-0-dns-testing
+spec:
+  nodeSelector:
+    kubernetes.io/hostname: <target_node>
+dns-resolver:
+  config:
+    search:
+    - example.com
+    - example.org
+    server:
+    - 2001:db8:f::1
+    - 192.0.2.251
+# ...
+----
+
+The following examples show situations that require configuring a network interface to store DNS values:
+
+* Configure a static DNS for a network interface with an automatic IP configuration. Note that for this configuration, you must set the `auto-dns` parameter to `false`, so that the Kubernetes NMState Operator can store custom DNS settings for the network interface. 
 +
 [source,yaml]
 ----
@@ -171,7 +195,7 @@ routes:
 # ...
 ----
 
-* Configure a static DNS name server to append to Dynamic Host Configuration Protocol (DHCP) and IPv6 Stateless Address AutoConfiguration (SLAAC) servers:
+* Configure a static DNS name server to append to Dynamic Host Configuration Protocol (DHCP) and IPv6 Stateless Address AutoConfiguration (SLAAC) servers.
 +
 [source,yaml]
 ----

networking/ovn_kubernetes_network_provider/rollback-to-openshift-sdn.adoc

@@ -10,4 +10,4 @@ As a cluster administrator, you can rollback to the OpenShift SDN from the OVN-K
 
 include::snippets/sdn-deprecation-statement.adoc[]
 
-include::modules/nw-ovn-kubernetes-rollback.adoc[leveloffset=+1]
+include::modules/nw-ovn-kubernetes-rollback.adoc[leveloffset=+1]