If a request to route an ECI call to a particular CICS server fails, indicating that the server is no longer available, the server is removed from the list of available servers.
If a request fails to reach the target CICS® server the Workload Manager tries again, this time sending it to a different server that it knows is available. The server that failed is removed from the list of active servers. It is added back after a period of time which you specify in the server group timeout field in the Configuration Tool. If the server fails again, the process is repeated.