On 1-jun-2007, at 19:00, Paul Vixie wrote:
yes. but also because of the other part of my text, which you didn't include in your reply so i don't know whether you agreed with it or not:
... we would have to define "routable", we could face implied liability for routability on "normal address space" (even if we continue to disclaim it in the NRPM as we do now), and we would then walk the slippery slope of the changing definition "largest" with respect to breidbart's maxim:
But what *IS* the internet? It's the largest equivalence class in the reflexive transitive symmetric closure of the relationship "can be reached by an IP packet from". --Seth Breidbart
in other words, the definition of "routable" depends on who you want to be able to exchange packets with.
I'm not sure if I agree that there is a potential liability, but then, I'm not a lawyer, I don't play one on TV and the legal system where I live is quite different from that where ARIN is. The question of what "routability" is is not one that I'm interested in. We know what this means today, massaging the definition to fit a particular purpose can only lead to suboptimal results.
"local" and "routable", not so much so.
Ok, if that makes you happy: Routable address space: any block of global unicast address space that when announced through or by an internet service provider, allows the holder to receive packets addressed to the addresses in question from all possible sources connected to the internet without additional effort. ULA fails this test because it falls outside the global unicast block and because announcing it to one ISP isn't enough to receive packets from all over the world because people will filter.