At this time all is working, but new workstations are planed to arrive and we need to increase the number of stations in the local institution, so 254 PCs actually are not enough. So we are looking a way to extend or increase the number of possibles workstation.
Just because a C class is 254 addresses doesn't mean that's your limit, just specify your network to be bigger than that. For example
**192.168.0.0-192.168.1.255 gives you 510 hosts **192.168.0.0/23