I've been asked to help with planning a total redesign of a network in order for them to sublet out individual offices to companies and provide shared services.
Obviously the network needs to be divided up via VLANs so that each office is isolated, but all the offices need to be able to talk to 1 central VLAN where shared services will be hosted (file server, DNS, DHCP, RADIUS for billing etc).
The main problem I can see right away is that VLANS have a limit of 32, but there will be around 50 offices eventually.
What would be the best way to go about this? I'm right at the start of the planning stage hence open to all suggestions.