Existing QoS class standardisation for packet based layer 2 and layer 3 services is largely non binding or missing. This Recommendation intends to simplify technical Ethernet, MPLS and IP QoS interconnection negotiations. Four ordinary classes and four auxiliary classes have been defined. This set of classes covers a wide range of transport service offerings.
The Recommendation gives guidance how to deal with issues resulting from differences in QoS deployments of interconnecting service providers, aiming on preservation of the original intent of the service.