diff --git a/network/deployed_networks.yaml b/network/deployed_networks.yaml
new file mode 100644
index 0000000000..0fe9ee93a3
--- /dev/null
+++ b/network/deployed_networks.yaml
@@ -0,0 +1,59 @@
+heat_template_version: rocky
+
+description: Create networks to split out Overcloud traffic
+
+parameters:
+  DeployedNetworkEnvironment:
+    type: json
+    description: Deployed network environment
+  CtlplaneNetworkCidrs:
+    type: json
+    description: Cidrs for the ctlplane network.
+  CtlplaneNetworkAttributes:
+    type: json
+    default: {}
+    description: >
+      A map containing attributes of the undercloud ctlplane network and
+      subnets. NOTE: The value for this parameter is automatically populated in
+      the plan environment by tripleoclient.
+
+resources:
+
+  NetworkExtraConfig:
+    type: OS::TripleO::Network::ExtraConfig
+
+  NetworkAttributesMap:
+    type: OS::Heat::Value
+    properties:
+      value:
+        map_merge:
+          - ctlplane: {get_param: CtlplaneNetworkAttributes}
+          - {get_param: [DeployedNetworkEnvironment, net_attributes_map]}
+
+  NetworkCidrMap:
+    type: OS::Heat::Value
+    properties:
+      value:
+        map_merge:
+          - ctlplane: {get_param: CtlplaneNetworkCidrs}
+          - {get_param: [DeployedNetworkEnvironment, net_cidr_map]}
+
+  NetworkIpVersionMap:
+    type: OS::Heat::Value
+    properties:
+      value:
+        map_merge:
+          - ctlplane:
+              yaql:
+                expression: $.data.items().first().last().ip_version
+                data: {get_param: [CtlplaneNetworkAttributes, subnets]}
+          - {get_param: [DeployedNetworkEnvironment, net_ip_version_map]}
+
+outputs:
+  net_cidr_map:
+    value: {get_attr: [NetworkCidrMap, value]}
+  net_ip_version_map:
+    value: {get_attr: [NetworkIpVersionMap, value]}
+  net_attributes_map:
+    value: {get_attr: [NetworkAttributesMap, value]}
+