subnetting a network

[knowj]

We have currently moved studios and want to separate the accounts PC on the network from the studio macs.

I was told to set the router subnet mask to 255.255.0.0 with an ip of 192.168.0.1 and have all the machines on subnet mask 255.255.255.0 with an ip range of 192.168.1.* and accounts on 192.168.2.*.

The problem I am encountering is that all the machines can still see each other. How would i adjust the IP ranges/subnets to segregate the network into restricted segments/ranges/subnets.

thanks in advance
John

[bathurst_guy]

You'll need a switch between the two subnets, set the IP addresses manually one lot in the 192.168.x.x range and the others in a 10.0.0.x range?