Re: [aqm] [tcpm] TCP ACK Suppression

Mikael Abrahamsson <swmike@swm.pp.se> Mon, 12 October 2015 14:13 UTC

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Date: Mon, 12 Oct 2015 16:13:45 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Greg White <g.white@CableLabs.com>
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Subject: Re: [aqm] [tcpm] TCP ACK Suppression
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On Fri, 9 Oct 2015, Greg White wrote:

>
>
> On 10/9/15, 2:04 PM, "Mark Allman" <mallman@icir.org> wrote:
>
>>
>>> 1) *you* shouldn't be using a mechanism that destroys information for
>>> others
>>> 2) *you* don't know where your mechanism will have an impact
>>> 3) you claim this might be safe *if* AQM is widely deployed
>>
>> tl;dr summary: myopia is why we can't have nice things
>
> Too true.  DOCSIS would have been much cleaner if we didn't have to deal
> with the fallout from the myopic TCP designers.  :-P

So I agree that most likely, it's beneficial to have fewer ACKs.

What I think people arguing against this practice are these kinds of 
issues:

http://blog.dan.drown.org/sb6183-dropping-ipv6-traffic/

I don't think there is a solution that we all can agree on, all approaches 
have their benefits and drawbacks. I think the above article just shows 
how things can go wrong in very subtle ways.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se