IPv6 and CDN's

Sun Nov 28 02:39:25 UTC 2021

> On Nov 27, 2021, at 17:21 , Christopher Morrow <morrowc.lists at gmail.com> wrote:
> 
> 
> 
> On Sat, Nov 27, 2021, 17:36 Owen DeLong via NANOG <nanog at nanog.org <mailto:nanog at nanog.org>> wrote:
> Well, 1.4x faster is a bit of an odd metric. I presume that means that connection set up times measured were on average
> 1/1.4 times as long for IPv6 as they were for IPv4, but there are other possible interpretations.
> 
> So really, that’s a convoluted way of saying it takes 29% less time to set up an IPv6 connection than an IPv4 connection on average.
> 
> I can believe that is likely in a scenario where one is dealing with IPv4 NAT overhead.
> 
> 
> Why isn't this just inconsistent paths between V6 and V4/nat? (Divergent topologies)

At least in most of my real world experience, they don’t tend to diverge all that much.

Further, post-initiation performance seems to be largely on par v4<->v6 and without NAT, I see faster
v4 connection startup times. V6 appears to still have a slight advantage, but it’s more like 5-10% than
30%.

Owen

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20211127/85d02d5b/attachment.html>