If the remote server chosen from the pool is unavailable, or if there is no appropriate entry in the $SYBASE/interfaces file on UNIX or the %SYBASE%\ini\sql.ini file on Windows:
The name of the next available server is requested from the pool, and a connection is attempted on that server.
If the connection attempt fails, the name of the next available server in the pool is requested. If there are no remaining servers, the client is disconnected and the login process fails.