@ rpm Package
omping.x86_64 : Utility to test IP multicast functionality – RHEL6 x86_64 기준

@ DESCRIPTION
    The omping is program which uses User Datagram Protocol to determine if computer is able to send and/or receive IP unicast and multicast or Broadcast
    packets from the network. It’s designed to be used in very similar way as ping(8) and also has some features of the fping(8) command.  Where ping(8) and
    omping differ is in who replies. In ping(8) replies are sent by the operating system and with omping another instance of omping sends the reply. This mean
    that omping must be running on all computers to test sending/receiving IP multicast/broadcast.  Its arguments are as follows:

@ example
##node-01
#omping node-01 node-02
##node-02
#omping node-01 node-02

>> 해당 노드에서 같은 명령어를 입력해야 된다.

## node-01
# omping node-01 node-02
node-02 : waiting for response msg
node-02 : joined (S,G) = (*, 232.43.211.234), pinging
node-02 :  unicast, seq=1, size=69 bytes, dist=0, time=0.095ms
node-02 :  unicast, seq=2, size=69 bytes, dist=0, time=0.134ms
node-02 : multicast, seq=2, size=69 bytes, dist=0, time=0.138ms
node-02 :  unicast, seq=3, size=69 bytes, dist=0, time=0.129ms

## node-02
# omping node-01 node-02
node-01 : waiting for response msg
node-01 : joined (S,G) = (*, 232.43.211.234), pinging
node-01 :  unicast, seq=1, size=69 bytes, dist=0, time=0.176ms
node-01 :  unicast, seq=2, size=69 bytes, dist=0, time=0.165ms
node-01 : multicast, seq=2, size=69 bytes, dist=0, time=0.169ms
node-01 :  unicast, seq=3, size=69 bytes, dist=0, time=0.184ms
node-01 : multicast, seq=3, size=69 bytes, dist=0, time=0.188ms