-def get_priv_net_config(project_name, net_name, subnet_name, router_name=None,
- cidr='10.55.0.0/24', external_net=None,
- netconf_override=None):
+def get_priv_net_config(project_name, net_name, mtu=None, subnet_name=None,
+ router_name=None, cidr='10.55.0.0/24',
+ external_net=None, netconf_override=None):