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diff --git a/network/external.yaml b/network/external.yaml
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+heat_template_version: 2015-04-30
+
+description: >
+  External network. Public traffic, Neutron l3router for floating IPs/SNAT, etc.
+
+parameters:
+  # the defaults here work for static IP assignment (IPAM) only
+  ExternalNetCidr:
+    default: '10.0.0.0/24'
+    description: Cidr for the external network.
+    type: string
+  ExternalNetValueSpecs:
+    default: {'provider:physical_network': 'external', 'provider:network_type': 'flat'}
+    description: Value specs for the external network.
+    type: string
+  ExternalNetAdminStateUp:
+    default: false
+    description: This admin state of of the network.
+    type: boolean
+  ExternalNetEnableDHCP:
+    default: false
+    description: Whether to enable DHCP on the associated subnet.
+    type: boolean
+  ExternalNetShared:
+    default: false
+    description: Whether this network is shared across all tenants.
+    type: boolean
+  ExternalNetName:
+    default: external
+    description: The name of the external network.
+    type: string
+  ExternalSubnetName:
+    default: external_subnet
+    description: The name of the external subnet in Neutron.
+    type: string
+
+
+resources:
+  ExternalNetwork:
+    type: OS::Neutron::Net
+    properties:
+      admin_state_up: {get_param: ExternalNetAdminStateUp}
+      name: {get_param: ExternalNetName}
+      shared: {get_param: ExternalNetShared}
+      value_specs: {get_param: ExternalNetValueSpecs}
+
+  ExternalSubnet:
+    type: OS::Neutron::Subnet
+    properties:
+      cidr: {get_param: ExternalNetCidr}
+      enable_dhcp: {get_param: ExternalNetEnableDHCP}
+      name: {get_param: ExternalSubnetName}
+      network: {get_resource: ExternalNetwork}
+
+outputs:
+  OS::stack_id:
+    description: Neutron external network
+    value: {get_resource: ExternalNetwork}