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Re: [v6ops] Lion/Snow Leaopard side-by-side on an IPv6 enabled ADSL2+ home line..

james woodyatt <jhw@apple.com> Tue, 02 August 2011 23:12 UTC

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From: james woodyatt <jhw@apple.com>
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Date: Tue, 02 Aug 2011 16:12:32 -0700
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References: <0D324E27-DB0C-4496-9E3D-EF01CEC2778E@apnic.net> <20110801053719.GA10524@srv03.cluenet.de> <CEC12E14-3C4C-479E-B4E5-00B02ECDBC7D@steffann.nl> <20110801143949.GA18578@srv03.cluenet.de> <CAD6AjGQsqSVV4XE=AF598M1esXTT3x71DgOwx6PDh48MyZcjNg@mail.gmail.com> <20110802122545.GA12922@srv03.cluenet.de> <m1QoES4-0001gWC@stereo.hq.phicoh.net> <D9712407-8D6D-49BC-B642-AD4DAD8E9CAB@apple.com> <m1QoM9f-0001eQC@stereo.hq.phicoh.net>
To: Philip Homburg <pch-v6ops-2@u-1.phicoh.com>
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Cc: IPv6 Operations <v6ops@ietf.org>
Subject: Re: [v6ops] Lion/Snow Leaopard side-by-side on an IPv6 enabled ADSL2+ home line..
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On Aug 2, 2011, at 14:05 , Philip Homburg wrote:
> 
> I'd say that preferring IPv6 is more consistent. At the moment I'm using 30ms as the cut off for 'roughly equal' and that seems to be working well.

Those 30ms of additional latency contribute significantly to the bandwidth delay product.

You may find them acceptable, but Apple engineers have looked pretty closely at it and decided that no time interval that could possibly make a difference would be tolerated by users.  I don't want to make users pay with a delay factor in the bandwidth delay product just to push an agenda that operators may or may not actually share, depending on with whom you are talking this week.

> For quite a while I didn't want to this either. I had the same idea that
> connecting to whatever is faster is best. But when you think about it,
> the whole world trying to connect to whatever system is fastest. You deny
> operators an imporant tool for essentially no gain for the customer.

I don't see it that way.  I see those 0-30ms of additional latency as an unacceptable penalty that we would be asking our users to pay, in exchange for nothing of any measurable value to them.  Do you see where our different perspectives leads us to reach different conclusions?


--
james woodyatt <jhw@apple.com>
member of technical staff, core os networking

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