diff --git a/neutron-controller.yml b/neutron-controller.yml
index 8ce60b7..cf03466 100644
--- a/neutron-controller.yml
+++ b/neutron-controller.yml
@@ -5,5 +5,7 @@
 
 - hosts: neutron-controller
   become: True
+  vars_files:
+    - settings.yml
   roles:
-     - neutron-controller
+    - neutron-controller
diff --git a/nova-compute.yml b/nova-compute.yml
index 69487e2..088f9e8 100644
--- a/nova-compute.yml
+++ b/nova-compute.yml
@@ -5,5 +5,7 @@
 
 - hosts: nova-compute
   become: True
+  vars_files:
+    - settings.yml
   roles:
-     - nova-compute
+    - nova-compute
diff --git a/roles/neutron-controller/tasks/main.yml b/roles/neutron-controller/tasks/main.yml
index b14e101..a269e92 100644
--- a/roles/neutron-controller/tasks/main.yml
+++ b/roles/neutron-controller/tasks/main.yml
@@ -16,6 +16,7 @@
 
 - set_fact:
     env_vars: >
+        -e "GLOBAL_PHYSNET_MTU={{ global_physnet_mtu }}"
         -e "KEYSTONE_HOST={{ listen_ip | default(hostvars[groups['keystone'][0]]['ansible_default_ipv4']['address']) }}"
         -e "MEMCACHED_HOST={{ listen_ip | default(hostvars[groups['memcached'][0]]['ansible_default_ipv4']['address']) }}"
         -e "METADATA_SECRET={{ secrets['METADATA_SECRET'] }}"
diff --git a/roles/nova-compute/templates/nova-compute.service b/roles/nova-compute/templates/nova-compute.service
index 7ae08b9..40555a1 100644
--- a/roles/nova-compute/templates/nova-compute.service
+++ b/roles/nova-compute/templates/nova-compute.service
@@ -10,6 +10,8 @@ ExecStartPre=-/usr/bin/docker kill %n
 ExecStartPre=-/usr/bin/docker rm %n
 ExecStart=/usr/bin/docker run --name %n \
     -e "GLANCE_CONTROLLER_HOST={{ hostvars[groups['glance-controller'][0]]['listen_ip'] | default(hostvars[groups['glance-controller'][0]]['ansible_default_ipv4']['address']) }}" \
+    -e "GLOBAL_PHYSNET_MTU={{ global_physnet_mtu }}" \
+    -e "GLOBAL_PHYSNET_MTU={{ global_physnet_mtu }}" \
     -e "KEYSTONE_HOST={{ hostvars[groups['keystone'][0]]['listen_ip'] | default(hostvars[groups['keystone'][0]]['ansible_default_ipv4']['address']) }}" \
     -e "METADATA_SECRET={{ secrets['METADATA_SECRET'] }}" \
     -e "MEMCACHED_HOST={{ hostvars[groups['memcached'][0]]['listen_ip'] | default(hostvars[groups['memcached'][0]]['ansible_default_ipv4']['address']) }}" \