thanks:http://www.linuxproblems.org/wiki/How_to_check_Multicasting
docker run -i -t --rm rednut/mcast-jgroups
or docker run -i -t --rm rednut/mcast-jgroups
docker run -i -t --rm rednut/mcast-jgroups sender
MCAST_ADDR=231.12.21.132
set the multicast address for the sender / receiverMCAST_PORT=45566
port to listen / send on
docker run -i -t --rm -e MCAST_ADDR=231.12.21.132 -e MCAST_PORT=45566 -e ACTION=sender rednut/mcast-jgroups
docker run -i -t --rm -e MCAST_ADDR=231.12.21.132 -e MCAST_PORT=45566 -e ACTION=receiver rednut/mcast-jgroups