Win32 CIC client programs outside the LAN cannot re-connect

When you configure your switchover servers, the server names you specify are NetBIOS names. For example, IndyServer1. For each NetBIOS name, there is a corresponding FQDN (fully-qualified domain name) that identifies the exact location of the server on your network. If necessary, you can also use a command line switch to specify the name of the FQDN of the server.

Beginning with 2015 Release 2, when a CIC client machine successfully connects to the switchover server, either the NetBIOS or FQDN versions of the server name are cached on the CIC client machine, depending on which form was used to connect. When the server attempts to connect, the client tries the most recently used server first and then the other in the case of a failure. This simplifies things for the user in the case of a Switchover event because the user does not have to manually specify which server to connect to.

If for some reason the FQDNs of the switchover servers cannot be detected or are detected improperly, you can use the ForceSwitchoverFQDNs, SwitchoverServerFQDN A and SwitchoverServerFQDN B parameters to force the switchover system to return the server names to the CIC client so they can be properly cached. For more information, see Required Switchover Server parameters.