diff --git a/ci/environments/scenario003-standalone.yaml b/ci/environments/scenario003-standalone.yaml
index 66d14f100f..bfc466068f 100644
--- a/ci/environments/scenario003-standalone.yaml
+++ b/ci/environments/scenario003-standalone.yaml
@@ -24,7 +24,7 @@ parameter_defaults:
   KeystoneTokenProvider: 'fernet'
   SwiftCeilometerPipelineEnabled: false
   NotificationDriver: 'noop'
-  NeutronPluginExtensions: qos,port_security,dns
+  NeutronPluginExtensions: qos,port_security,dns_domain_ports
   RpcPort: 31459
   NotifyPort: 5672
   ContainerCli: podman
diff --git a/deployment/neutron/neutron-plugin-ml2.yaml b/deployment/neutron/neutron-plugin-ml2.yaml
index b72be92e5d..497b6d35c0 100644
--- a/deployment/neutron/neutron-plugin-ml2.yaml
+++ b/deployment/neutron/neutron-plugin-ml2.yaml
@@ -42,7 +42,7 @@ parameters:
     default: 'datacentre'
     description: If set, flat networks to configure in neutron plugins.
   NeutronPluginExtensions:
-    default: "qos,port_security,dns"
+    default: "qos,port_security,dns_domain_ports"
     description: |
         Comma-separated list of extensions enabled for the Neutron plugin.
     type: comma_delimited_list
diff --git a/environments/enable-designate.yaml b/environments/enable-designate.yaml
index 3d8ab08908..398dcc869b 100644
--- a/environments/enable-designate.yaml
+++ b/environments/enable-designate.yaml
@@ -11,7 +11,7 @@ parameter_defaults:
 
   # Comma-separated list of extensions enabled for the Neutron plugin.
   # Type: comma_delimited_list
-  NeutronPluginExtensions: qos,port_security,dns
+  NeutronPluginExtensions: qos,port_security,dns_domain_ports
 
 resource_registry:
   OS::TripleO::Services::DesignateApi: ../deployment/designate/designate-api-container-puppet.yaml
diff --git a/environments/services-baremetal/neutron-ovn-dvr-ha.yaml b/environments/services-baremetal/neutron-ovn-dvr-ha.yaml
index e94150b2ad..83f900f58a 100644
--- a/environments/services-baremetal/neutron-ovn-dvr-ha.yaml
+++ b/environments/services-baremetal/neutron-ovn-dvr-ha.yaml
@@ -21,7 +21,7 @@ parameter_defaults:
   NeutronServicePlugins: 'qos,ovn-router,trunk,segments,port_forwarding,log'
   NeutronVniRanges: ['1:65536', ]
   NeutronEnableDVR: true
-  NeutronPluginExtensions: "qos,port_security,dns"
+  NeutronPluginExtensions: "qos,port_security,dns_domain_ports"
   ControllerParameters:
     OVNCMSOptions: "enable-chassis-as-gw"
   ControllerSriovParameters:
diff --git a/environments/services-baremetal/neutron-ovn-ha.yaml b/environments/services-baremetal/neutron-ovn-ha.yaml
index b4ad5aee6f..2a4fb80a18 100644
--- a/environments/services-baremetal/neutron-ovn-ha.yaml
+++ b/environments/services-baremetal/neutron-ovn-ha.yaml
@@ -20,7 +20,7 @@ parameter_defaults:
   NeutronNetworkType: 'geneve'
   NeutronServicePlugins: 'qos,ovn-router,trunk,segments,port_forwarding,log'
   NeutronVniRanges: ['1:65536', ]
-  NeutronPluginExtensions: "qos,port_security,dns"
+  NeutronPluginExtensions: "qos,port_security,dns_domain_ports"
   ComputeParameters:
     NeutronBridgeMappings: ""
   ControllerParameters:
diff --git a/environments/services/designate.yaml b/environments/services/designate.yaml
index 18d0a35010..9129d85158 100644
--- a/environments/services/designate.yaml
+++ b/environments/services/designate.yaml
@@ -7,7 +7,7 @@ parameter_defaults:
 
   # Comma-separated list of extensions enabled for the Neutron plugin.
   # Type: comma_delimited_list
-  NeutronPluginExtensions: qos,port_security,dns
+  NeutronPluginExtensions: qos,port_security,dns_domain_ports
 
 resource_registry:
   OS::TripleO::Services::DesignateApi: ../../deployment/designate/designate-api-container-puppet.yaml
diff --git a/environments/services/neutron-ovn-dvr-ha.yaml b/environments/services/neutron-ovn-dvr-ha.yaml
index 6995cd02d7..f854c0bfe4 100644
--- a/environments/services/neutron-ovn-dvr-ha.yaml
+++ b/environments/services/neutron-ovn-dvr-ha.yaml
@@ -23,7 +23,7 @@ parameter_defaults:
   NeutronVniRanges: ['1:65536', ]
   NeutronRpcWorkers: 1
   NeutronEnableDVR: true
-  NeutronPluginExtensions: "qos,port_security,dns"
+  NeutronPluginExtensions: "qos,port_security,dns_domain_ports"
   ControllerParameters:
     OVNCMSOptions: "enable-chassis-as-gw"
   OVNDnsServers: []
diff --git a/environments/services/neutron-ovn-ha.yaml b/environments/services/neutron-ovn-ha.yaml
index 2035d649e2..3221f90aa6 100644
--- a/environments/services/neutron-ovn-ha.yaml
+++ b/environments/services/neutron-ovn-ha.yaml
@@ -20,7 +20,7 @@ parameter_defaults:
   NeutronNetworkType: ['geneve' , 'vxlan', 'vlan', 'flat']
   NeutronServicePlugins: 'qos,ovn-router,trunk,segments,port_forwarding,log'
   NeutronVniRanges: ['1:65536', ]
-  NeutronPluginExtensions: "qos,port_security,dns"
+  NeutronPluginExtensions: "qos,port_security,dns_domain_ports"
   NeutronRpcWorkers: 1
   ComputeParameters:
     NeutronBridgeMappings: ""
diff --git a/environments/services/neutron-ovn-standalone.yaml b/environments/services/neutron-ovn-standalone.yaml
index 4d092f88f4..54d62f8c0e 100644
--- a/environments/services/neutron-ovn-standalone.yaml
+++ b/environments/services/neutron-ovn-standalone.yaml
@@ -23,7 +23,7 @@ parameter_defaults:
   NeutronVniRanges: ['1:65536', ]
   NeutronRpcWorkers: 1
   NeutronEnableDVR: true
-  NeutronPluginExtensions: "qos,port_security,dns"
+  NeutronPluginExtensions: "qos,port_security,dns_domain_ports"
   ControllerParameters:
     OVNCMSOptions: "enable-chassis-as-gw"
   ControllerSriovParameters:
diff --git a/environments/services/undercloud-neutron-ovn-dhcp.yaml b/environments/services/undercloud-neutron-ovn-dhcp.yaml
index 02b3d1d0c8..f9c18ec7f5 100644
--- a/environments/services/undercloud-neutron-ovn-dhcp.yaml
+++ b/environments/services/undercloud-neutron-ovn-dhcp.yaml
@@ -26,6 +26,6 @@ parameter_defaults:
   DhcpAgentNotification: false
   NeutronServicePlugins: 'ovn-router,segments'
   NeutronMechanismDrivers: ['ovn', 'baremetal']
-  NeutronPluginExtensions: "port_security,dns"
+  NeutronPluginExtensions: "port_security,dns_domain_ports"
   NeutronNetworkType: ['geneve', 'vxlan', 'vlan', 'flat']
   NeutronTypeDrivers: ['geneve', 'vxlan', 'vlan', 'flat']
diff --git a/releasenotes/notes/enable-dns_domain_ports-extension-by-default-4a620563ff5954d6.yaml b/releasenotes/notes/enable-dns_domain_ports-extension-by-default-4a620563ff5954d6.yaml
new file mode 100644
index 0000000000..e82626dd5e
--- /dev/null
+++ b/releasenotes/notes/enable-dns_domain_ports-extension-by-default-4a620563ff5954d6.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    'dns_domain_ports' extension driver is now enabled by
+    default and this allows 'dns_domain' to be set for ports.