iperf3 -c x.x.x.x -u -b 1M -t 120 -l 0.16k -S 184 -4
-t, --time # time in seconds to transmit for (default 10 secs)
-l, --length #[KMG] length of buffer to read or write
-S Setting DSCP/TOS bit vectors
...
QoS and DSCP value TOS and IP precedence
EF=46 - - - > 46 x 2 x 2 ( move to the lefts twice or add 2x zero in binary ) = 184
