diff --git a/neutron_tempest_plugin/config.py b/neutron_tempest_plugin/config.py
index 6217456..df07042 100644
--- a/neutron_tempest_plugin/config.py
+++ b/neutron_tempest_plugin/config.py
@@ -57,6 +57,9 @@
                     '"mtu":<MTU> - integer '
                     '"cidr"<SUBNET/MASK> - string '
                     '"provider:segmentation_id":<VLAN_ID> - integer'),
+    cfg.IntOpt('max_mtu',
+               default=1500,
+               help='Max mtu value of default deployments".'),
     cfg.StrOpt('q_agent',
                default=None,
                choices=['None', 'linuxbridge', 'ovs', 'sriov'],