Your organization hosts a mixture of paas, saas, and iaas for dozens of other organizations.
your network infrastructure is fairly old and your boss has tasked you with redesigning the network.
your boss hopes that your experience with cloud technologies will build a network that is secure, reliable, meets current and future customer needs, and allows for centralized management of the environment. requirements:

each customer is separate and cannot access each other's data
centralized management for all customers
minimize equipment used
allow for overlapping ip schemes
i. e. customer a and customer b can both use 10.1.2.0/24