Need help with advanced setup (VLAN, WLAN, Layer 2)

Sorry, I’ve described the need of VLAN a bit incorrectly…
I need VLAN not specially for roaming clients – what I need is client’s “corporate” LAN inside ours.

Talking about DHCP – sure there is one…

While trying to configure EoIP for similar needs I’ve had to reset router twice… Also the percent of successfull RouterOS upgrades on routers with EoIP and bridges - 50/50… At least for me…

Anyway… I’ve read topic http://forum.mikrotik.com/t/secure-vlan-trunk-and-wisp/5776/1 but still can’t understand which interfaces to use as primary for VLANs and what actually to bridge…

Microsoft Visio 2003