Why?!?
-----Original Message----- From: Marco Moock via NANOG <nanog@lists.nanog.org> Sent: Wednesday, December 3, 2025 10:13 To: North American Network Operators Group <nanog@lists.nanog.org> Cc: Marco Moock <mm@dorfdsl.de> Subject: Re: IPv6 Performance (was Re: IPv4 Pricing)
Am 03.12.2025 um 06:59:51 Uhr schrieb Vasilenko Eduard:
Wrong math. The internet average packet size is very close to 750B - it has been published many times in many places.
Wrong assumption about the user needs. User does not care about serialization time. He/she cares about FCT==Flow Completion Time. If one would get 2.6% less on the bottleneck, then his FCT would be 2.6% longer. His page would open later. His file would download later.
Your theoretical arguments have been discussed many times, it is now boring.
The real experience shows that IPv6 is faster in certain real existing environments like cellular networks (many people use them even at home) or DS-Lite. I've also experienced overloaded CGNAT. The shorter header is almost irrelevant in practice.
-- Gruß Marco
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