|I only have around 70 IP devices: computers, printers, plotters, switches, etc.|
The problem is that in our network, we have one big piece of hardware, its an HP rack, full of computation servers, file servers, SAN servers, switches, etc. They are all working together as a geoprocessing machine. They are in the 192.168.156.0/24 LAN. There are three workstations that manage the big system. They are now in a fully independent LAN, with their own Internet router. I can't use their subnet and mix everything. This is why I planned to use VLANs.
I need to provide those three workstations with printing capabilities, and in a few time, I'll have to setup a Windows SBS2008 with the domain server, Exchange server etc., and I need those workstations to be part of the office LAN...
I'm learning a lot with your explanations wanderer, thanks a lot,