" mod-flows SWITCH FLOW modify actions of matching FLOWs\n"
" del-flows SWITCH [FLOW] delete matching FLOWs\n"
" monitor SWITCH print packets received from SWITCH\n"
+ " execute SWITCH CMD [ARG...] execute CMD with ARGS on SWITCH\n"
"\nFor local datapaths, remote switches, and controllers:\n"
" probe VCONN probe whether VCONN is up\n"
" ping VCONN [N] latency of N-byte echos\n"