diff --git "a/\173\043 interfaces \043\175/single_ovs_br_floating" "b/\173\043 interfaces \043\175/single_ovs_br_floating"
index 9ac7c73..3f8281d 100644
--- "a/\173\043 interfaces \043\175/single_ovs_br_floating"
+++ "b/\173\043 interfaces \043\175/single_ovs_br_floating"
@@ -2,25 +2,34 @@
               # {{ interfaces_role }}
               {{- set_param('linux_network_bridge', 'openvswitch') }}
               {%- set interface_name = interfaces.keys()[0] %}
+              {%- set interface = interfaces[interface_name] %}
               {{ interface_name }}:
                 enabled: true
                 name: {{ interface_name }}
-                mtu: ${_param:interface_mtu}
+                {%- if 'mtu' in interface %}
+                mtu: {{ interface['mtu'] }}
+                {%- endif %}
                 proto: manual
                 type: eth
               br-floating:
                 enabled: true
                 type: ovs_bridge
-                mtu: ${_param:interface_mtu}
+                {%- if 'mtu' in interface %}
+                mtu: {{ interface['mtu'] }}
+                {%- endif %}
               float-to-ex:
                 enabled: true
                 type: ovs_port
-                mtu: ${_param:interface_mtu}
+                {%- if 'mtu' in interface %}
+                mtu: {{ interface['mtu'] }}
+                {%- endif %}
                 bridge: br-floating
               br-ex:
                 enabled: true
                 type: bridge
-                mtu: ${_param:interface_mtu}
+                {%- if 'mtu' in interface %}
+                mtu: {{ interface['mtu'] }}
+                {%- endif %}
                 address: ${_param:external_address}
                 netmask: 255.255.255.0
                 use_interfaces:
diff --git "a/\173\043 interfaces \043\175/single_ovs_br_prv" "b/\173\043 interfaces \043\175/single_ovs_br_prv"
index 3fe4b2b..d3991f1 100644
--- "a/\173\043 interfaces \043\175/single_ovs_br_prv"
+++ "b/\173\043 interfaces \043\175/single_ovs_br_prv"
@@ -2,10 +2,13 @@
               # {{ interfaces_role }}
               {{- set_param('linux_network_bridge', 'openvswitch') }}
               {%- set interface_name = interfaces.keys()[0] %}
+              {%- set interface = interfaces[interface_name] %}
               {{ interface_name }}:
                 enabled: true
                 name: {{ interface_name }}
-                mtu: ${_param:interface_mtu}
+                {%- if 'mtu' in interface %}
+                mtu: {{ interface['mtu'] }}
+                {%- endif %}
                 proto: manual
                 type: eth
                 ovs_bridge: br-prv
diff --git "a/\173\043 roles \043\175/_linux_network_interface" "b/\173\043 roles \043\175/_linux_network_interface"
index c94af4d..85de14f 100644
--- "a/\173\043 roles \043\175/_linux_network_interface"
+++ "b/\173\043 roles \043\175/_linux_network_interface"
@@ -18,6 +18,7 @@
         'tenant_network_gateway',
         'dns_server01',
         'dns_server02',
+        'mtu',
     ]
 %}
 {%- set interface_roles = {} %}