-I, --stdin input the data to be transmitted from stdin\n\
-L, --listenport # port to receive bidirectional tests back on\n\
-P, --parallel # number of parallel client threads to run\n\
+ -S --dscp # set the 6-bit IPv4/v6 DiffServ codepoint\n\
-T, --ttl # time-to-live, for multicast (default 1)\n\
\n\
Miscellaneous:\n\