request = ofputil_encode_dump_ports_request(vconn_get_version(vconn), port);
dump_stats_transaction(vconn, request);
vconn_close(vconn);
request = ofputil_encode_dump_ports_request(vconn_get_version(vconn), port);
dump_stats_transaction(vconn, request);
vconn_close(vconn);