V6 still not supported

Sun Mar 20 11:35:46 UTC 2022

Matt Hoppes wrote:

> At this point I would *love* to see IPv4 get extended, a software patch 
> applied to devices, and IPv6 die a quick painless death.

A problem is that, a software patch is enough to upgrade an IPv4
host IPv6 capable. :-)

Anyway, with TUPLE (TCP and UDP with Port Length Extension, not
TUBA) using 32bit port numbers, which is easier to deploy than
full QUIC, an IPv4 address can be shared by 2^24 hosts each
having 256 port number ranges.

It should be noted that, with static End to End NAT

	https://datatracker.ietf.org/doc/html/draft-ohta-e2e-nat-00

where port number collisions are prevented not by stateful
NAT GW but end systems, state maintenance at the NAT GW
is not necessary, while enjoying full end to end transparency.

						Masataka Ohta