This Recommendation specifies a quality of service (QoS) control architecture and requirements
covering aspects, such as resource reservation, admission control and gate control, for
Ethernet-based IP access networks. Based on the resource and admission control functions (RACF)
as defined in [ITU-T Y.2111], this Recommendation provides details specific to Ethernet-based IP
access networks. An Ethernet-based IP access network is an IP access network which comprises the
Ethernet aggregation network, access nodes, and edge nodes, and may also include the IP
aggregation network.
In this Recommendation, the Ethernet aggregation network supports VLANs as defined in
[b-IEEE 802.1Q] and [b-IEEE 802.1ad]. Note that the QoS mechanisms for the last mile user access
segment are MAC technology-specific and as such are out of the scope of this Recommendation.