The Internet is composed of many separate administrative domains called Autonomous Systems (ASs). To enable the end-to-end Quality of Service (QoS) for Internet applications, the inter-autonomous system QoS routing plays an important role in advertising the available network resources between domains. In this paper, Border Gateway Protocol (BGP) is extended to provide end-to-end QoS. The choice of using BGP is due to 2 reasons: (1) BGP is currently the only inter-domain routing protocol activated on the Internet. (2) The use of attributes attached to routes makes BGP powerful and scalable inter-domain routing protocol. This paper introduces an extension to BGP to support multi-domain feature for our new FICC-Diffserv architecture, which was introduced in an earlier work [1]. Via simulation results, we demonstrate the performance of the BGPextended architecture, including route selection policy and overhead reduction issues. The paper concludes by highlighting some directions for future research.