Routing Optimization for Inter-Domain Traffic Engineering under Identifier Network

The routing architecture of today's Internet is facing scalability problems. Multi-homing, traffic engineering, suboptimal address allocations are making the Forwarding Information Base (FIB) of the Default Free Zone (DFZ) growing at a nonlinear rate. Such scalability problems are mainly caused by the overloading of the IP address semantics. That is, an IP address represents not only the location but also the identity of a host. To address the scalability problem, Identifier Network, as a novel proposed network architecture, separates the identifier and locator roles of IP addresses into two evolving spaces: Accessing Identifier (AID) and Routing Identifier (RID) by Identifier/Locator separation mechanism. Such separation provides opportunities to reconsider routing optimization for inter-domain Traffic Engineering, as which is a main contribution to the Border Gateway Protocol (BGP) routing table growth. Based on Identifier Network, we propose a solution for traffic engineering, which can be divided into two distinct parts: End-to-End traffic engineering and Neighbor-to-Neighbor traffic engineering. For each scenario, we develop a routing decision method for both routers and other network entities, such as IDMS (Identifier Mapping Server in Identifier Network). To analyze the feasibility of the solution, we collect Routeviews data set and the results show that the scheme proposed could reduce the burden of the core routing table.