A multicast address is an IP address in the range from 22.214.171.124 to 126.96.36.199. The valid range is from 188.8.131.52 to 184.108.40.206. The default value used by WebLogic Server is 220.127.116.11. 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.