How do I create multiple clusters when using Multicast discovery?

We normally do not recommend the use of Multicast in production.

With Multicast there are two different way to separate sets of nodes into independent clusters. You can either define different group names (group passwords alone are not enough) or you can configure the separate cluster nodes to use different Multicast groups (set with different broadcast IP addresses).

For further information, see our documentation: http://docs.hazelcast.org/docs/latest/manual/html-single/index.html#discovering-members-by-multicast