An E-Tree service as defined by the MEF is for connecting a number of UNIs providing sites with a hub and spoke topology. Each UNI is designated as either root or leaf. A root UNI can communicate with any leaf UNI, while a leaf UNI can communicate only with a root UNI. This is based on a Rooted Multipoint EVC. The service can be delivered port-based (EPTree) or VLAN-based (EVP-Tree). E-Tree is ideal for residential broadband providers where UNI to UNI connectivity is not desired.