Merge pull request #57092 from xenolinux/resolveconf

OCPBUGS#5137: Add 0.0.0.0 in /etc/resolv.conf file

Author: snarayan-redhat

networking/multiple_networks/configuring-additional-network.adoc

@@ -24,6 +24,15 @@ For an additional network, IP addresses are provisioned through an IP Address Ma
 
 * Applying a YAML manifest: You can manage the additional network directly by creating an `NetworkAttachmentDefinition` object. This approach allows for the chaining of CNI plugins.
 
+[NOTE]
+====
+When deploying {product-title} nodes with multiple network interfaces on {rh-openstack-first} with OVN SDN, DNS configuration of the secondary interface might take precedence over the DNS configuration of the primary interface. In this case, remove the DNS nameservers for the subnet id that is attached to the secondary interface:
+[source,terminal]
+----
+$ openstack subnet set --dns-nameserver 0.0.0.0 <subnet_id>
+----
+====
+
 [id="{context}_configuration-additional-network-attachment"]
 == Configuration for an additional network attachment