Hello all, The ULA discussion has been going on for some time now, and I'd like to summarize it a bit. The differences between ULA address space and PI (or PA) address space: - ULA space should be easier/cheaper to get than PI space - PI space is meant for routing outside your organization and associated networks - ULA space is meant for inside your organization and associated networks Usefulness of ULA space: - I see some people/organizations who would realy like it - I see some people/organizations who don't like it As people who don't ULA don't have to use it (and filter fc00::/7), I would like to see other (preferably objective/technical) reasons why ULA space is a bad idea. Why should we deny ULA space to those who want it and think it is useful to them? Usefulness of ULA-Central space: - Some people think that the possibility of a conflict between two ULA-Local prefixes is so small that it does not really matter - Other people think even that very small chance does matter, and they would like a ULA-Central registry If the people/organizations who want an ULA-Central registry also pay for it, are there any other problems with providing such a registry? The question remains about who should operate and maintain that registry. Because RIPE NCC has a lot of experience with maintaining an IP address registry, they are a likely candidate for this. What arguments are there for and against letting RIPE NCC maintain this registry? What are possible alternatives? I hope I summarized everything correctly, and that I covered all remaining questions. If I missed anything, please let me know. If you have any input about any of the remaining questions, let's discuss it! Thank you, Sander Steffann