I am not checking my emails until Nov 14th, 2025. Thanks, Samaneh

On Nov 6, 2025, at 3:53 PM, Marco Moock via NANOG <[email protected]> wrote:

On 06.11.2025 12:13 Vasilenko Eduard via NANOG <[email protected]>
wrote:

Nope. It is an extremally complex bunch of protocols on the 1st hope
(between the computer and the router).

If it was be like you said - IPv4 would be down already.

It already is in certain networks.

Various ISPs do DS-Lite - no IPv4 to the customer - IPv6 with tunneled
IPv4 if needed.
Cellular ISPs only give IPv6 with NAT64 or CLAT.

--
kind regards
Marco

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