Frank Ellermann wrote: > Maybe the IETF could agree that it won't use the former "class E" for > any past, present, or future experiments. Updating RFC 1112 (STD 5) > or maybe RFC 1166, and then RFC 5735 for 6.25% of all windmills minus > one. Given that NAT can expand the space 100 or 1000 times, while maintaining the end to end transparency if you so wish, it's not 6.25% but 625% or 6250%. That is, unreservation is worth doing and as the first step, it is a good idea to use some of the space for shared transition where all the equipments having the unreserved addresses should be able to treat the unreservation. However, as the unreserved space is still precious, only small part of the space should be allocated for shared transition. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf