You can pair both the devices and bond and in future on power off/on, in your central project check if any boded device is already present in the bonding list of your central device and if it is present send the connect request to the bonded peripheral device only.
If you want to connect to a new server device , remove the bonding information from your central device and allow connection to a new server (peripheral) device.
To implement this feature please refer the code example from below link ( Along with document for testing the project)-
This example will show you how to bond the devices using CySmart App , how to remove a device from the bonding list based on UART commands.
Please let us know if it helps.