Brian E Carpenter wrote: > The problem is that the creation of disjoint addressing realms > (due to NAT and to IPv4/IPv6 coexistence) has made distributed > application design almost impossible without kludges. That's why we shouldn't use IPv6. With port restricted IPv4 (such as A+P, E2ENAT, PE-ARP), the addressing realm of address+port is identical as the current IPv4 Internet that there are no kludges necessary. Application protocols and programs, including but not limited to FTP, are working as is without ALG kludges. As PR-IP effectively expands IPv4 address space by a factor of 100 or 1000, there is no point to migrate to old and poor IPv6, even if we need a long term solution. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf