I currently have multiple servers which are all on their own separate networks (each server on a different network talking to other devices). I want to implement a common central data server which will store database backups for the SQL instances on the servers. My plan right now is to add a router to the network architecture which will allow the servers to communicate with the Central data server. In the past these servers were all on the same network which caused communication problems, so they were separated. This leads to my question: If the now "isolated" server networks are connected to the same router and all communicate with a central data storage unit, will this keep them "isolated" or will it effectively be putting all the devices back on the same network?
For context, since they were networked in the past, they're all on the same subnet. The servers all communicate to field devices such as PLC's and HMI's and exist in a manufacturing environment.
Thanks in advance!