Abstract
This paper presents an architecture that supports inter-domain quality of service (QoS) across the multi-provider commercial Internet. The architecture describes the full set of functions in the management, control and data planes required for network providers to work together to deliver end-to-end QoS-based IP connectivity services. We use the concept of QoS Classes and show how these can be combined together using service level specifications (SLSs) agreed between adjacent domains to construct a defined end-to-end QoS that is supported across multiple domains.