When using the PLS Connector to connect to a policy server farm, you can set up a failover system that automatically switches from a failed server to a running server to let you keep working without interruption. For large sites that use a policy server farm, failover can provide reliable and rapid service.
When discovering the SSO endpoint, the policy server that is to be the primary policy server must be provided. After the discovery, the Fail-Over property page in the Endpoint Property Sheet shows the policy server that was specified. You can then add more policy servers to the list. Once the policy servers have been added, they can be edited or even removed as needed.
The PLS Connector always tries to connect the first policy server in the list, so the order of the policy servers in the list is significant. If the connection fails to the first policy server then the PLS Connector tries connecting to the second policy server and so on. Once a connection is successfully made, PLS continues to work with the server. Every 60 seconds, PLS checks whether failed servers are available again.
Note: When changing the policy server list in the Fail-Over tab, the primary server, (for example, the first entry in the list) must be responsive for the changes to be accepted and applied.
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