I am about to overhaul one of my client's LAN from top to bottom. it's a 4 story office building with over 100 desktops, 30 printers and several servers a misc network equipment (nas, wap, etc)i have 4 Dell powerconnect switches. my gateway will be a Sonicwall NSA device. Just need a few suggestions as to how to go about setting them up. 1st and foremost, to vlan or NOT to vlan? I was thinking of setting up a vlan for each floor. What do you guys think?