Inter-Domain Traffic Engineering Using an AS-Level Multipath Routing Architecture
Traffic Engineering (TE) aims at distributing traffic through routes to suit a specific goal. BGP addresses TE in a very specific way: it is a single path system, and mixes traffic control and route dissemination by letting attributes influence the choice of the best path. Several techniques have been proposed but due to BGP characteristics they have high complexity requirements such as the need for coordination and information about the network that is not locally available and, in most cases, the use of tunnelling. In a previous work, the authors proposed an inter-domain routing architecture DTIA (Dynamic Topological Information Architecture) that builds a robust multipath routing system based on the inter-AS relationships and routing policies.