Naming and Addressing for Routing Scalability

168 INTRODUCTION The current interdomain routing system for the Internet, based on the Border Gateway Protocol (BGP), achieves scalability by exploiting address hierarchy and summarizability. However, multihoming (MH), traffic engineering (TE), and mobility between networks are threatening the hierarchical address aggregation and are already pushing the BGP routing tables to the limit. Although both the commercial Internet and the network of networks (as envisioned for the Global Information Grid) used by the DoD exhibit a topological hierarchy, the Global Information Grid’s end devices and edge networks have a much higher degree of mobility. The Global Information Grid also has greater needs for TE and MH. The DoD network involves a backbone based on commercial Internet standards and uses several layers of mobile ad hoc networks in its tactical edge. These edge networks are used for ground-, sea-, and air-based wireless communication on the move. Wired and satellite connections allow these tactical networks to access the backbone. It should be noted that the end devices Naming and Addressing for Routing Scalability