This deployment is very similar to Single OpenSSO Enterprise Server Load Balancer in a Single Site with Session Failover , but with two important differences. In this deployment multiple OpenSSO Enterprise server load balancers exist. Additionally, the OpenSSO Enterprise server load balancers are specified in each Policy Agent bootstrap configuration. This deployment provides load balancer failover to ensure continuous service when system failure occurs. When system failure occurs at the load balancer, one site fails over to another site.
The load balancers are also configured as login URL's in each Policy Agent configuration. Policy Agent configuration can reside on the same host as the Policy Agent, or can reside in the OpenSSO Enterprise embedded configuration data store.
The following figure illustrates a deployment with multiple OpenSSO Enterprise server load balancers with session failover.
The following figure illustrates the session handling part of the process flow. See Figure 17–2 for a detailed illustration of steps 1 through 13.