A Mac address header is provided for manufacturers.
This allows the type of hardware to be recognized and assigned a specific range.
To avoid conflicts, ranges can't be superimposed on each other, so you need to indicate a unique range to the others.
For example, the main range should be 192.168.1.1 - 192.168.1.10, the new range 192.168.1.11 - 192.168.1.50, and the next range 192.168.1.51 - 192.168.1.254.
Let's take the example where we want to apply a specific IP range for VMWare virtual machines