diff --git a/environments/neutron-ml2-ovn-ha.yaml b/environments/neutron-ml2-ovn-ha.yaml
index 3e332ad191..433ba6658d 100644
--- a/environments/neutron-ml2-ovn-ha.yaml
+++ b/environments/neutron-ml2-ovn-ha.yaml
@@ -23,3 +23,6 @@ parameter_defaults:
   NeutronNetworkType: 'geneve'
   NeutronServicePlugins: 'qos,ovn-router,trunk'
   NeutronVniRanges: ['1:65536', ]
+
+  ComputeParameters:
+    NeutronBridgeMappings: ""
diff --git a/environments/neutron-ml2-ovn.yaml b/environments/neutron-ml2-ovn.yaml
index f484c50549..c754efc5dd 100644
--- a/environments/neutron-ml2-ovn.yaml
+++ b/environments/neutron-ml2-ovn.yaml
@@ -23,3 +23,6 @@ parameter_defaults:
   NeutronNetworkType: 'geneve'
   NeutronServicePlugins: 'qos,ovn-router,trunk'
   NeutronVniRanges: ['1:65536', ]
+
+  ComputeParameters:
+    NeutronBridgeMappings: ""
diff --git a/environments/services-docker/neutron-ovn-ha.yaml b/environments/services-docker/neutron-ovn-ha.yaml
index 6d2289b9df..53b60e541b 100644
--- a/environments/services-docker/neutron-ovn-ha.yaml
+++ b/environments/services-docker/neutron-ovn-ha.yaml
@@ -23,3 +23,6 @@ parameter_defaults:
   NeutronNetworkType: 'geneve'
   NeutronServicePlugins: 'qos,ovn-router,trunk'
   NeutronVniRanges: ['1:65536', ]
+
+  ComputeParameters:
+    NeutronBridgeMappings: ""
diff --git a/environments/services-docker/neutron-ovn.yaml b/environments/services-docker/neutron-ovn.yaml
index 6f63ba2c8c..62b3a9d0c2 100644
--- a/environments/services-docker/neutron-ovn.yaml
+++ b/environments/services-docker/neutron-ovn.yaml
@@ -23,3 +23,6 @@ parameter_defaults:
   NeutronNetworkType: 'geneve'
   NeutronServicePlugins: 'qos,ovn-router,trunk'
   NeutronVniRanges: ['1:65536', ]
+
+  ComputeParameters:
+    NeutronBridgeMappings: ""
diff --git a/puppet/services/neutron-ovs-agent.yaml b/puppet/services/neutron-ovs-agent.yaml
index a2f82a5845..9f9aa86d55 100644
--- a/puppet/services/neutron-ovs-agent.yaml
+++ b/puppet/services/neutron-ovs-agent.yaml
@@ -101,6 +101,20 @@ resources:
       DefaultPasswords: {get_param: DefaultPasswords}
       EndpointMap: {get_param: EndpointMap}
 
+  # Merging role-specific parameters (RoleParameters) with the default parameters.
+  # RoleParameters will have the precedence over the default parameters.
+  RoleParametersValue:
+    type: OS::Heat::Value
+    properties:
+      type: json
+      value:
+        map_replace:
+          - map_replace:
+            - neutron::agents::ml2::ovs::bridge_mappings: NeutronBridgeMappings
+            - values: {get_param: [RoleParameters]}
+          - values:
+              NeutronBridgeMappings: {get_param: NeutronBridgeMappings}
+
 outputs:
   role_data:
     description: Role data for the Neutron OVS agent service.
@@ -113,10 +127,10 @@ outputs:
       config_settings:
         map_merge:
           - get_attr: [NeutronBase, role_data, config_settings]
+          - get_attr: [RoleParametersValue, value]
           - neutron::agents::ml2::ovs::l2_population: {get_param: NeutronEnableL2Pop}
             neutron::agents::ml2::ovs::enable_distributed_routing: {get_param: NeutronEnableDVR}
             neutron::agents::ml2::ovs::arp_responder: {get_param: NeutronEnableARPResponder}
-            neutron::agents::ml2::ovs::bridge_mappings: {get_param: NeutronBridgeMappings}
             neutron::agents::ml2::ovs::tunnel_types: {get_param: NeutronTunnelTypes}
             neutron::agents::ml2::ovs::extensions: {get_param: NeutronAgentExtensions}
             # NOTE: bind IP is found in Heat replacing the network name with the
diff --git a/puppet/services/ovn-controller.yaml b/puppet/services/ovn-controller.yaml
index d8d53594b4..65102adcdb 100644
--- a/puppet/services/ovn-controller.yaml
+++ b/puppet/services/ovn-controller.yaml
@@ -55,25 +55,41 @@ parameters:
     default: "br-int"
 
 
+resources:
+  # Merging role-specific parameters (RoleParameters) with the default parameters.
+  # RoleParameters will have the precedence over the default parameters.
+  RoleParametersValue:
+    type: OS::Heat::Value
+    properties:
+      type: json
+      value:
+        map_replace:
+          - map_replace:
+            - ovn::controller::ovn_bridge_mappings: NeutronBridgeMappings
+            - values: {get_param: [RoleParameters]}
+          - values:
+              NeutronBridgeMappings: {get_param: NeutronBridgeMappings}
+
 outputs:
   role_data:
     description: Role data for the OVN Controller agent
     value:
       service_name: ovn_controller
       config_settings:
-        ovn::southbound::port: {get_param: OVNSouthboundServerPort}
-        ovn::controller::ovn_encap_type: {get_param: OVNTunnelEncapType}
-        ovn::controller::ovn_encap_ip: {get_param: [ServiceNetMap, NeutronTenantNetwork]}
-        ovn::controller::ovn_bridge_mappings: {get_param: NeutronBridgeMappings}
-        ovn::controller::ovn_bridge: {get_param: OVNIntegrationBridge}
-        nova::compute::force_config_drive: true
-        tripleo.ovn_controller.firewall_rules:
-          '118 neutron vxlan networks':
-                proto: 'udp'
-                dport: 4789
-          '119 neutron geneve networks':
-            proto: 'udp'
-            dport: 6081
+        map_merge:
+          - get_attr: [RoleParametersValue, value]
+          - ovn::southbound::port: {get_param: OVNSouthboundServerPort}
+            ovn::controller::ovn_encap_type: {get_param: OVNTunnelEncapType}
+            ovn::controller::ovn_encap_ip: {get_param: [ServiceNetMap, NeutronTenantNetwork]}
+            ovn::controller::ovn_bridge: {get_param: OVNIntegrationBridge}
+            nova::compute::force_config_drive: true
+            tripleo.ovn_controller.firewall_rules:
+              '118 neutron vxlan networks':
+                    proto: 'udp'
+                    dport: 4789
+              '119 neutron geneve networks':
+                    proto: 'udp'
+                    dport: 6081
       step_config: |
         include ::tripleo::profile::base::neutron::agents::ovn
       upgrade_tasks: