diff --git a/tcp_tests/templates/underlay/virtual-mcp11-ovs.yaml b/tcp_tests/templates/underlay/virtual-mcp11-ovs.yaml
index 75ccfb7..a9d8601 100644
--- a/tcp_tests/templates/underlay/virtual-mcp11-ovs.yaml
+++ b/tcp_tests/templates/underlay/virtual-mcp11-ovs.yaml
@@ -1,7 +1,13 @@
+{% import 'underlay/virtual-mcp11-ovs--meta-data.yaml' as CLOUDINIT_META_DATA %}
+{% import 'underlay/virtual-mcp11-ovs--user-data-cfg01.yaml' as CLOUDINIT_USER_DATA_CFG01 %}
+{% import 'underlay/virtual-mcp11-ovs--user-data1604.yaml' as CLOUDINIT_USER_DATA_1604 %}
+
 ---
 aliases:
-  default_interface_model:
-    - &interface_model !os_env INTERFACE_MODEL, virtio
+ - &interface_model {{ os_env('INTERFACE_MODEL', 'virtio') }}
+ - &cloudinit_meta_data {{ CLOUDINIT_META_DATA }}
+ - &cloudinit_user_data_cfg01 {{ CLOUDINIT_USER_DATA_CFG01 }}
+ - &cloudinit_user_data_1604 {{ CLOUDINIT_USER_DATA_1604 }}
 
 {% set DOMAIN_NAME = os_env('LAB_CONFIG_NAME', 'virtual-mcp11-ovs') + '.local' %}
 {% set HOSTNAME_CFG01 = os_env('HOSTNAME_CFG01', 'cfg01.' + DOMAIN_NAME) %}
@@ -19,7 +25,7 @@
 
     address_pools:
       private-pool01:
-        net: 172.16.10.0/24:24
+        net: {{ os_env('PRIVATE_ADDRESS_POOL01', '10.60.0.0/16:24') }}
         params:
           ip_reserved:
             gateway: +1
@@ -36,7 +42,7 @@
             dhcp: [+90, -10]
 
       admin-pool01:
-        net: 192.168.10.0/24:24
+        net: {{ os_env('ADMIN_ADDRESS_POOL01', '10.70.0.0/16:24') }}
         params:
           ip_reserved:
             gateway: +1
@@ -53,7 +59,7 @@
             dhcp: [+90, -10]
 
       tenant-pool01:
-        net: 10.1.0.0/24:24
+        net: {{ os_env('TENANT_ADDRESS_POOL01', '10.80.0.0/16:24') }}
         params:
           ip_reserved:
             gateway: +1
@@ -70,7 +76,7 @@
             dhcp: [+10, -10]
 
       external-pool01:
-        net: 10.16.0.0/24:24
+        net: {{ os_env('EXTERNAL_ADDRESS_POOL01', '10.90.0.0/16:24') }}
         params:
           ip_reserved:
             gateway: +1
@@ -158,8 +164,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data-cfg01.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_cfg01
 
               interfaces:
                 - label: ens3
@@ -199,8 +205,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: &interfaces
                 - label: ens3
@@ -240,8 +246,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: *interfaces
               network_config: *network_config
@@ -269,8 +275,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: *interfaces
               network_config: *network_config
@@ -298,8 +304,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: *interfaces
               network_config: *network_config
@@ -325,8 +331,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
 
               interfaces: &all_interfaces
@@ -376,8 +382,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: *all_interfaces
               network_config: *all_network_config
@@ -402,8 +408,8 @@
                   format: raw
                   device: cdrom
                   bus: ide
-                  cloudinit_meta_data: !include virtual-mcp11-ovs--meta-data.yaml
-                  cloudinit_user_data: !include virtual-mcp11-ovs--user-data1604.yaml
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
 
               interfaces: *all_interfaces
               network_config: *all_network_config