there were two slides telling why/when to use nat. there were none on why not. Uhm, Randy, is this some personal crusade or something ?
not unless you still beat your wife. nats do cause problems. we should not be presenting only one side. in this case, to an audience which has serious problems with nats and allocation. for example, one organization with a backbone that alone needs about three /24s and has over 1,600 end hosts scattered over this routed backbone. the techno-conialist ptt gives them a /29 because, among other reasons, ripe says use nats. in these countries, good engineers are an extremely scarce resource. having them spend time dealing with the aberations and consequences of nats is socially irresponsible as well as often technically unsound. randy