IPerf3 VoIP simulation

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