Masataka, > The reality, instead, is that actual networks running IPv4 and IPv6 > ***CAN'T*** deal with renumbering, because of their inertia. > While I obviously have sympathy for the sentiment, I think your statement is too strong. I believe it would be better to say that end users have an economic incentive to avoid having to renumber, and most are able to make use of RFC 1918 / ULAs and NAT with attendant consequences to avoid the effort involved. Still, I would argue strongly for inclusion of a fuller discussion about technologies that obviate the need to renumber. Eliot _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf