Hallam-Baker, Phillip wrote: > I am trying to parse this claim. > > Are you saying that the DNS is fragile and raw IP relatively robust? DNS is layered on top of IP. So for a large class of IP failures, DNS won't work either. And if IP routing fails, DNS is likely to be irrelevant because the application using DNS won't work anyway. And in practice, DNS is quite likely to fail due to configuration errors, inadequate provisioning, outdated cache entries due to unanticipated changes, brain-damaged DNS caches built into NATs, failure of registries to transfer a DNS name in a timely fashion, etc. So it's not a question of whether DNS is less reliable than IP (it is), or even whether the reliability of DNS + IP is less than that of IP alone (it is). It's a question of whether increasing reliance on DNS by trying to get apps and other things to use DNS names exclusively, makes those apps and other things less reliable. And I'd argue that it does, except perhaps in a world where renumbering happened frequently, at irregular intervals, and without notice. And I don't think that's a realistic scenario. Keith _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf