The Internet's simple design resulted in huge success in basic telecommunicationservices. However, the current Internet architecture has failed in terms of introducingmany innovative technologies as end-to-end (E2E) services such as multicasting,guaranteed quality of services (QoS) and many others. We argue that contractingover static service level agreements (SLA) and point-to-anywhere service definitionsare the main reasons behind this failure. In that sense, the Internet architecture needsmajor shifts since it neither allows (i) users to indicate their value choices at sufficientgranularity nor (ii) providers to manage risks involved in investment for new innovativeQoS technologies and business relationships with other providers as well as users.To allow these much needed economic flexibilities, we introduce contract-switching asa new paradigm for the design of future Internet architecture. In this work, we implementcontract-routing framework with specific focus on long-term contracted servicesin Link State Contract Routing scheme. Our work shows that E2e guaranteed QoSservices can be achieved in routing over contracted edge-to-edge service abstractionswhich are built on today's popular protocols with reasonable protocol overhead
