RE: IPv6 Performance (was Re: IPv4 Pricing)

[Vasilenko Eduard via NANOG <nanog () lists nanog org>]

Fundamentally, IPv6 should be slower because of the bigger headers/overhead.
But it could be faster because CG-NAT detour (if CG-NAT is not on the shortest path).
IPv4 and IPv6 could both be faster/slower because of non-congruent peering topology.

Actually, the claim that IPv6 is faster is pretty silly.
Ed/
> -----Original Message-----
> From: Marco Moock via NANOG <nanog () lists nanog org>
> Sent: Tuesday, December 2, 2025 07:42
> To: nanog () lists nanog org
> Cc: Marco Moock <mm () dorfdsl de>
> Subject: Re: IPv6 Performance (was Re: IPv4 Pricing)
>
> On 01.12.2025 16:44 Bryan Fields via NANOG <nanog () lists nanog org>
> wrote:
>
> > At least once or twice a month I'm downloading something and will find
> > the IPv4 to transfer significantly faster.  Case in point, I
> > downloaded the proxmox iso yesterday to a colo server with 50g
> > uplinks.  It loafed at 2.4 mbytes/s using default wget, which of
> > course preferred ipv6.  Adding -4 to wget made that shoot up to 80
> > mbytes/s.
>
> Have you checked packet loss and latency?
>
> Maybe that is caused by different routes due to peering.
>
> --
> kind regards
> Marco
>
> Send spam to abfall1764603853 () stinkedores dorfdsl de
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