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Re: [v6ops] draft-vf-v6ops-ipv6-deployment

Gert Doering <gert@space.net> Sat, 03 April 2021 09:44 UTC

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Date: Sat, 03 Apr 2021 11:44:16 +0200
From: Gert Doering <gert@space.net>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: Gert Doering <gert@space.net>, Vasilenko Eduard <vasilenko.eduard@huawei.com>, "v6ops@ietf.org" <v6ops@ietf.org>, JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
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Subject: Re: [v6ops] draft-vf-v6ops-ipv6-deployment
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Hi,

On Sat, Apr 03, 2021 at 09:22:32AM +1300, Brian E Carpenter wrote:
> On 03-Apr-21 01:46, Gert Doering wrote:
> > On Wed, Mar 31, 2021 at 11:10:29AM +0000, Vasilenko Eduard wrote:
> >> Hi Jordi,
> >> The fact that something is going to CDN would not help you. Because every CDN accelerates many Web sites.
> >> If the original Web site does not support it ??? then CDN could not help here. It would continue to stream IPv4 for this request.
> > 
> > Uh, no?  CDNs typically decouple frontend protocol from backend protocol.
> 
> Sure, but the site can *request* dual stack or IPv4-only.

True.  This was more about what I read in the statement above "if the
origin site is IPv4-only, the CDN cannot be dual-stacked" (which is not
correct).

> > Especially if the content is cached anyway, why should it be relevant
> > where it came from?
> Doesn't streaming often bypass the CDN?

Dunno.  For popular content, caching makes sense.  For "live" streaming,
having a close-to-the user multiplexer makes lots of sense.

For "nobody ever watches this show", caching might not be very useful,
so bypassing the CDN might make sense if you know that beforehand...

Classical "is it beneficial to cache this?" CS problem :-)

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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