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The Carrier Ethernet Service Framework has two components:

1. The definition of a set of generic attributes with the complete range of acceptable values for each attribute. This is documented in MEF 10.x.
2. The definition of a set of Carrier Ethernet Service Definitions that includes constraints on the values for the generic attributes to those acceptable for each service type. This is done in MEF 6.x.

Generic Attributes

MEF10.x defines three sets of generic attributes:

UNI attributes

UNI Attributes (MEF 10.3) are characteristics of the User Network Interface (UNI) itself and are applied to all services on the UNI.

EVC per UNI attributes

EVC per UNI Attributes (MEF 10.2 and MEF 10.3) are EVC attributes that are associated with the specific UNI and can be different on other UNIs within the EVC.

EVC attributes

EVC Attributes are attributes that describe the EVC itself. They apply to the EVC across the entire carrier network.

Attributes by Service Type

MEF 6.x defines six Carrier Ethernet Service types, three private service types and three virtual private service types, by constraining the values in each of the three sets of generic attributes to an appropriate set of values.