Before configuring your load balancer, you must:
Create Communications Server clusters or server instances to participate in load balancing using the cluster profile. For more information, see Chapter 3, Setting Up Clusters in Communications Server.
Make sure the group management service (GMS) is enabled. It is enabled by default. For more information, see Group Management Service.
Create node agents for these clusters or server instances. For more information, see Chapter 4, Configuring Node Agents.
Configure session persistence using in-memory replication. For more information, see Chapter 6, Configuring High Availability Session Persistence and Failover
Deploy applications to these clusters or instances. For more information, see the Sun GlassFish Communications Server 2.0 Application Deployment Guide.