diff --git a/neutron/plugins/ml2/drivers/openvswitch/agent/common/config.py b/neutron/plugins/ml2/drivers/openvswitch/agent/common/config.py
index a503a89e7e9..f5bbd327925 100644
--- a/neutron/plugins/ml2/drivers/openvswitch/agent/common/config.py
+++ b/neutron/plugins/ml2/drivers/openvswitch/agent/common/config.py
@@ -110,7 +110,7 @@ agent_opts = [
                        "(gre and/or vxlan).")),
     cfg.PortOpt('vxlan_udp_port', default=p_const.VXLAN_UDP_PORT,
                 help=_("The UDP port to use for VXLAN tunnels.")),
-    cfg.IntOpt('veth_mtu',
+    cfg.IntOpt('veth_mtu', default=9000,
                help=_("MTU size of veth interfaces")),
     cfg.BoolOpt('l2_population', default=False,
                 help=_("Use ML2 l2population mechanism driver to learn "