0) Usage:
    C:\> mcast

1)Send multicast packets:
     C:\>mcast /GRPS: 239.1.1.1 /SRCS:10.10.11.128 /NUMPKTS:1000 /INTVL:50 /SEND 

2) Receive multicast packets
     C:\>mcast /GRPS:239.1.1.1 /RECV

Please use "/intf" argument to specify a interface to receive or send if you have multiple network interfaces.
 

