This may seem to be after-the-fact. However, with so many twists and hurdles involved in rolling out the IPv6 because it was not designed with the fundamental engineering discipline of being backward compatible with the IPv4, we really should look at the whole subject seriously one more time. Below is the result of a study that we accidentally ventured into. It utilizes nothing more than the original IPv4 protocol RFC791 and the long-reserved yet hardly-utilized 240/4 address block. We have submitted a draft proposal called EzIP (phonetic for Easy IPv4) to IETF:
https://tools.ietf.org/html/draft-chen-ati-adaptive-ipv4-address-space-03
Basically, the EzIP approach will not only resolve IPv4 address shortage issues, but also largely mitigate the root cause to cyber security vulnerabilities, plus open up new possibilities for the Internet, all within the confines of the IPv4 domain. In fact, this scheme may be deployed "stealthily" for isolated regions where needed. These should relieve the urgency to deploy the IPv6 for an appreciable length of time.
Any thought or comment will be much appreciated.
Abe (2018-07-15 11:32)