Philip Homburg wrote:
Any form of communication with the current IPv4 internet requires some
sort of CGNAT.
Any form of communication with the current IPv4/IPv6 mixed internet,
except for dual stack, also requires some sort of NAT.
Technically, A+P (address
plus port) mapping is a bit different, but for the customer that doesn't
make a lot of difference.
A+P is equivalent to end to end NAT, though end to end NAT
only needs plain IP routers behind gateways, whereas A+P
requires routers with A+P routing capability for large
(but not very large) number of hosts. As networks behind
the gateways are local and not so large, it can not be a
practical problem.
And A+P has serious scalability problems.
No, not at all.
Masataka Ohta
