Design and implementation of the IS-IS routing protocol with traffic engineering

This paper proposes an architecture of intermediate system-to-intermediate system (IS-IS) for the ATM based multiprotocol label switching (MPLS) system. IS-IS is a link state routing protocol designed to provide routing in network layer protocols with datagram service. IS-IS has favored scalability in the aspect of minimizing storage and computing in level 1 routers. Therefore, it is important to support IS-IS for the MPLS system used in backbone networks. We propose the architecture of IS-IS routing protocol and extensions for traffic engineering in MPLS system. We also describe its implementation and test results.