We are setting up a network for a large building project. Each contractor will have its own lan with one shared internet connection. I am thinking about a cisco switch with one port going to each contractors lan, connected to there own mini switch or hub. I dont want any traffic to pass between these lans. Would it be possible to set up an access list for each port on the main switch to deny traffic from the other ports? eg network 1 - 192.168.0.0 255.255.0.0 into port 1 network 2 - 192.168.1.0 255.255.0.0 into port 2 network 3 - 192.168.2.0 255.255.0.0 into port 3. port 1 deny traffic from 192.168.1.0 0.0.0.255 and 192.168.2.0
0.0.0.255. The default gateway would have to be reachable from all lans. How would I get each smaller lan to dhcp its own address range? Is this the simplest way to set this up or would I need VLANs passing through a router or layer 3 switching?
Thanks in advance for any advice.
H.