Before you begin
Ensure that you have created a cluster and Managed Servers. For information on creating a Managed Server, see Create Managed Servers.
If you are configuring a new cluster in a new domain, BEA recommends that you use the using the Configuration Wizard. For more information on creating a clustered domain, see "Setting Up Clusters" in Using WebLogic Server Clusters.
IP multicast is a simple broadcast technology that enables multiple applications to subscribe to a given IP address and port number and listen for messages. A multicast address is an IP address in the range from 188.8.131.52 to 184.108.40.206.
You must define a multicast address for each cluster. This address should be unique to this cluster and should not be shared by other applications. The default multicast address is 220.127.116.11. You should not use an IP multicast address within the range x.0.0.1.
The multicast port is used by cluster members to communicate with each other. Valid values are between 1 and 65535.