OSDOCS-16614: Documented VIP optional with user-managed LB feature

Author: dfitzmau

modules/nw-dns-forward.adoc

@@ -20,9 +20,11 @@ endif::openshift-rosa,openshift-rosa-hcp,openshift-dedicated[]
 * Provide a list of upstream DNS servers (`spec.upstreamResolvers`).
 * Change the default forwarding policy.
 
-[NOTE]
-====
 A DNS forwarding configuration for the default domain can have both the default servers specified in the `/etc/resolv.conf` file and the upstream DNS servers.
+
+[IMPORTANT]
+====
+During pod creation, Kubernetes uses the `/etc/resolv.conf` file that exists on a node. If you modify the `/etc/resolv.conf` file on a host node, the changes do not propagate to the `/etc/resolv.conf` file that exists in a container. You must recreate the container for changes to take effect.
 ====
 
 .Procedure