Rehoming Edge Links for Better Traffic Engineering
Traditional traffic engineering adapts the routing of traffic within the network to maximize performance. The authors propose a new approach that also adaptively changes where traffic enters and leaves the network - changing the "Traffic matrix", and not just the intra-domain routing configuration. Their approach does not affect traffic patterns and BGP routes seen in neighboring networks, unlike conventional inter-domain traffic engineering where changes in BGP policies shift traffic and routes from one edge link to another. Instead, they capitalize on recent innovations in edge-link migration that enable seamless rehoming of an edge link to a different internal router in an ISP backbone network - completely transparent to the router in the neighboring domain.