To assign networks to network interfaces on your hypervisors, tag the network interfaces with Network service types. Then later, tag your networks to assign them to these network interfaces.
Privileges: Access infrastructure view and Private DCs, View datacenter details, Manage network elements
To create network service types:
In your datacenter, go to Network → Network service types
Click the + add button
Enter the Name of the network service type that the tag will represent
Click Save