A multicast address is an IP address in the range from 126.96.36.199 to 188.8.131.52. The valid range is from 184.108.40.206 to 220.127.116.11. The default value used by WebLogic Server is 18.104.22.168. You should avoid using multicast addresses in the range x.0.0.1. This address must be unique to this cluster and should not be shared by other applications.
The multicast port is used by cluster members to communicate with each other. Valid values are between 1 and 65535.
The new cluster appears in the Summary of Clusters table.