vat_json_object_add_uint (node, "link_up_down", mp->link_up_down);
vat_json_object_add_uint (node, "link_duplex", mp->link_duplex);
vat_json_object_add_uint (node, "link_speed", mp->link_speed);
vat_json_object_add_uint (node, "link_up_down", mp->link_up_down);
vat_json_object_add_uint (node, "link_duplex", mp->link_duplex);
vat_json_object_add_uint (node, "link_speed", mp->link_speed);