In this paper we present the Virtual Topology Service (VTS), a new approach to provide interdomain services taking into account QoS and Traffic Engineering (TE) constraints. It is known that in these days the provisioning of end-to-end interdomain connections does not consider any type of QoS due to limitations of the BGP routing protocol. At the same time, many extensions have been proposed to BGP, however none of them were put into practice. We advocate in favor of a service layer that offers new mechanisms for interdomain routing without affecting the underlying Internet infrastructure. The VTS abstracts the physical network details of each Autonomous System (AS) and is totally integrated.with BGP. We use the Internet hierarchy to obtain more alternative routes towards a destination. The architecture was already used to provide interdomain services in optical networks. In this paper we show how the architecture can be used to provide interdomain connections in IP networks. We will show how the VTS and other services such as the end-to-end negotiation service work together to provide a complete mechanism for provisioning of interdomain QoS-enabled routes. Preliminary evaluation results are also presented. © Springer-Verlag Berlin Heidelberg 2006.4268 LNCS 205217Overcoming barriers to disruptive innovation in networking (2005) Report of NSF Workshop, , NSF ReportAgarwal, S., Chuah, C., Katz, R., OPCA: Robust interdomain policy routing and traffic control (2003) OPENARCHhttp://www.w3.org/2002/ws, Web Services ActivityVerdi, F.L., Madeira, E., Magalhães, M., Web Services and SOA as Facilitators for ISPs (2006) International Conference on Telecommunications (ICT'06), Madeira Island, Portugal, , MayVerdi, F.L., Duarte, R., De Lacerda, F.C., Madeira, E., Cardozo, E., Magalhães, M., Provisioning and management of inter-domain connections in optical networks: A service oriented architecture-based approach (2006) IEEE/IFIP Network Operations and Management Symposium (NOMS'06)Verdi, F.L., Madeira, E., Magalhães, M., On the performance of interdomain provisioning of connections in optical networks using web services (2006) IEEE International Symposium on Computers and Communications (ISCC'06), Sardinia, Italy, , JuneHowaxth, M.P., Provisioning for interdomain quality of service: The MESCAL approach (2005) IEEE Communications Magazine, 43 (6), pp. 129-137. , JuneCristallo, G., Jacquenet, G., An approach to inter-domain traffic engineering (2002) Proceedings of XVIII World Telecommunications CongressXiao, L., Advertising interdomain Qos routing (2004) IEEE Journal on Selected Areas in Communications, 22 (10), pp. 1949-1964. , DecemberSubramanian, L., Agarwal, S., Rexford, J., Katz, R., Characterizing the internet hierarchy from multiple vantage points (2002) IEEE Infocom, , June(2006), http://fabrice.bellard.free.fr/qemu, April(2006), http://net-snmp.sourceforge.net, April(2005), http://ws.apache.org/axis