n What this talk is about is the design space for user selection in routing. n There are a number of ways of carrying out loose or strict source routing, u classical IPv4 source route options, u dynamic NATs, u IPv6 hop-by-hop options, u application layer relays and so on. n Each has its shortcomings, and the time is about right for offering input to medium routing research in the IETF/IRTF, to get a solution to efficient selection of "articulation" points to drive inter-ISP competition.