diff --git a/Chef/GitChef/package/UI/ui.yaml b/Chef/GitChef/package/UI/ui.yaml
index 5d836b85..bad5ff7b 100644
--- a/Chef/GitChef/package/UI/ui.yaml
+++ b/Chef/GitChef/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -25,6 +32,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -86,6 +97,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/Chef/OrionChef/package/UI/ui.yaml b/Chef/OrionChef/package/UI/ui.yaml
index 533337ca..4b4d5f4e 100644
--- a/Chef/OrionChef/package/UI/ui.yaml
+++ b/Chef/OrionChef/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -26,6 +33,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -93,6 +104,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/CloudFoundry/package/UI/ui.yaml b/CloudFoundry/package/UI/ui.yaml
index ff31d93b..c18bf2bc 100644
--- a/CloudFoundry/package/UI/ui.yaml
+++ b/CloudFoundry/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -24,6 +31,10 @@ Application:
     image: $.instanceConfiguration.osImage
     keyname: $.instanceConfiguration.keyPair
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -75,6 +86,12 @@ Forms:
             Select a Key Pair to control access to instances. You can login to
             instances using this KeyPair after the deployment of application.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           label: Hostname
           type: string
diff --git a/CloudFoundryDiego/package/UI/ui.yaml b/CloudFoundryDiego/package/UI/ui.yaml
index 9b783bcf..8a4514f3 100644
--- a/CloudFoundryDiego/package/UI/ui.yaml
+++ b/CloudFoundryDiego/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -24,6 +31,10 @@ Application:
     image: 'murano-bosh-cf-diego'
     keyname: $.instanceConfiguration.keyPair
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -68,6 +79,12 @@ Forms:
             Select a Key Pair to control access to instances. You can login to
             instances using this KeyPair after the deployment of application.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           label: Hostname
           type: string
diff --git a/HDPSandbox/package/UI/ui.yaml b/HDPSandbox/package/UI/ui.yaml
index 1eb8602c..ac121784 100644
--- a/HDPSandbox/package/UI/ui.yaml
+++ b/HDPSandbox/package/UI/ui.yaml
@@ -1,4 +1,11 @@
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -11,6 +18,10 @@ Application:
     flavor: $.instanceConfiguration.flavor
     image: 'hdp-sandbox'
     assignFloatingIp: true
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -35,6 +46,12 @@ Forms:
             min_disk: 50
             min_memory_mb: 4096
             min_vcpus: 1
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           label: Hostname
           type: string
diff --git a/MySQL/package/UI/ui.yaml b/MySQL/package/UI/ui.yaml
index 7f16a374..3f3cd37f 100644
--- a/MySQL/package/UI/ui.yaml
+++ b/MySQL/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -28,6 +35,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -113,6 +124,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where the application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/PostgreSQL/package/UI/ui.yaml b/PostgreSQL/package/UI/ui.yaml
index 33a96dee..9b205be7 100644
--- a/PostgreSQL/package/UI/ui.yaml
+++ b/PostgreSQL/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -28,6 +35,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -111,6 +122,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where the application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/Puppet/MySQLPuppet/package/UI/ui.yaml b/Puppet/MySQLPuppet/package/UI/ui.yaml
index 1636a97a..ceb5df78 100644
--- a/Puppet/MySQLPuppet/package/UI/ui.yaml
+++ b/Puppet/MySQLPuppet/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -26,6 +33,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -93,6 +104,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/Rally/package/UI/ui.yaml b/Rally/package/UI/ui.yaml
index 9d02cdb1..a5090483 100644
--- a/Rally/package/UI/ui.yaml
+++ b/Rally/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -25,6 +32,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -88,6 +99,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/Tomcat/package/UI/ui.yaml b/Tomcat/package/UI/ui.yaml
index 18a40fd3..4c04252e 100644
--- a/Tomcat/package/UI/ui.yaml
+++ b/Tomcat/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -25,6 +32,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -83,6 +94,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where the application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern
diff --git a/Windows/ActiveDirectory/package/UI/ui.yaml b/Windows/ActiveDirectory/package/UI/ui.yaml
index 7f86a50c..5147747d 100644
--- a/Windows/ActiveDirectory/package/UI/ui.yaml
+++ b/Windows/ActiveDirectory/package/UI/ui.yaml
@@ -1,4 +1,4 @@
-Version: 2
+Version: 2.1
 
 Templates:
   primaryController:
@@ -14,6 +14,10 @@ Templates:
       availabilityZone: $.instanceConfiguration.availabilityZone
       keyname: $.instanceConfiguration.keyPair
       assignFloatingIp: $.appConfiguration.assignFloatingIP
+      networks:
+        useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+        useFlatNetwork: false
+        customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
   secondaryController:
     ?:
@@ -25,6 +29,16 @@ Templates:
       name: generateHostname($.appConfiguration.unitNamingPattern, $index + 1)
       flavor: $.instanceConfiguration.flavor
       image: $.instanceConfiguration.osImage
+      networks:
+        useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+        useFlatNetwork: false
+        customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
+
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 
 Application:
@@ -174,6 +188,13 @@ Forms:
             Select valid image for a service. Image should already be prepared and
             registered in glance.
 
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
+
         - name: availabilityZone
           type: azone
           label: Availability zone
diff --git a/ZabbixServer/package/UI/ui.yaml b/ZabbixServer/package/UI/ui.yaml
index 5ab4b02d..35d12baf 100644
--- a/ZabbixServer/package/UI/ui.yaml
+++ b/ZabbixServer/package/UI/ui.yaml
@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -28,6 +35,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -106,6 +117,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where the application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern