Before create cluster I was checked multicast and is working fine.
Here are the results from omping 10.10.200.10 10.10.200.11 10.10.200.12
10.10.200.11 : multicast, seq=5, size=69 bytes, dist=0, time=142.178ms
10.10.200.12 : unicast, seq=1, size=69 bytes, dist=0, time=129.531ms
10.10.200.12 ...