** iperf.ns - sample ns file 

** send-streams 
   This program starts an iperf server, and initiates simultaneous iperf
    client connections to host specified using -d for duration specified
    by -t.

      usage: $0 [-h] [-m num] [-d ip -t time] [-w directory]

     -h        : this (help) message
     -v        : verbose output
     -m num    : become master node for synchronization purpose of num nodes
     -d ip     : destination ip address or full name
     -t time   : iperf duration in secs
     -w dir    : working directory

   example: $0 -d 192.168.1.1 -t 30 -d 192.168.4.2 -t 45


** runiperfmesh
   * to be run at node-startup 
   * takes care of FC2/FC4 dependency of iperf
   * currently starts all pair iperf for 10 secs
   -- result files are stored in /local/logs/iperfmesh directory 
      (you can use loghole to get them)