[Simple] Subnetting/VLAN for Industrial Control Panel

OK, this is not really a Linux related post, but OS independent networking. If that bothers you, stop reading.

For anyone who is still interested, here is my situation. My company will be installing a new industrial control panel at a municipal water treatment plant. The panel will have several components (PLC, HMI, AC motor drives, etc.) connected via ethernet. The panel will also contain a fully managed ethernet switch with DHCP and VLAN capabilities (http://www.n-tron.com/products_detail.php?product=44&series=5).

For obvious reasons, the folks at the plant do not want this panel to take 5+ IP address from the top level network, so they've asked that this panel be configured as a subnet. For example, if the primary network uses IP addresses 192.168.1.x, the devices in this panel should be addressed 192.168.2.X, and be accessible to 192.168.1.X devices.

I've set up quite a few (BASIC) home networks, and this task doesn't really seem like it should be that hard. Also, I've read quite a few articles explaining the binary aspects of IP addresses and how subnet masks work, but its not really sinking in. Can somebody point me in the direction of a practical walkthrough showing how this can be accomplished? I don;t need anything hardware specifiec, but something with screenshots and actual device settings would be very helpful.

Thanks,
-DylanC
.

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