Re: [aqm] CoDel: After much ado ...

"Mirja Kuehlewind (IETF)" <> Fri, 15 September 2017 10:24 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id CAE0F1330A9 for <>; Fri, 15 Sep 2017 03:24:18 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -2.001
X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); domainkeys=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id Icbf5oDdcQ9E for <>; Fri, 15 Sep 2017 03:24:17 -0700 (PDT)
Received: from ( []) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 4D9A4126D0C for <>; Fri, 15 Sep 2017 03:24:17 -0700 (PDT)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default;; b=NW/8BIFCIp9Z330AzTsHhe8qCdq3Da76jCy17ROSS/4jwz+XOhYg7jM839/oMYCQu6ncURwy2lFNAl0ZMW2sRntwD7ORIi+60gPBj8qASwBLWA778GECTL/0IMW3m04LJJfLI+W5UerqFm/JbPYZs9QnwyqX4m37q/5CMEk2iho=; h=Received:Received:Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc:Content-Transfer-Encoding:Message-Id:References:To:X-Mailer:X-PPP-Message-ID:X-PPP-Vhost;
Received: (qmail 7693 invoked from network); 15 Sep 2017 12:24:15 +0200
Received: from (HELO ? ( by with ESMTPSA (DHE-RSA-AES256-SHA encrypted, authenticated); 15 Sep 2017 12:24:15 +0200
Content-Type: text/plain; charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\))
From: "Mirja Kuehlewind (IETF)" <>
In-Reply-To: <>
Date: Fri, 15 Sep 2017 12:24:13 +0200
Cc:, "" <>, Van Jacobson <>, Andrew McGregor <>, Kathleen Nichols <>
Content-Transfer-Encoding: quoted-printable
Message-Id: <>
References: <>
To: Jana Iyengar <>
X-Mailer: Apple Mail (2.3273)
X-PPP-Message-ID: <>
Archived-At: <>
Subject: Re: [aqm] CoDel: After much ado ...
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: "Discussion list for active queue management and flow isolation." <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Fri, 15 Sep 2017 10:24:19 -0000

Hi Jana again,

I really don’t want to hold up the doc any further but... I had a quick look at the changes and the comments, and have a few more questions to you how or if those points where address. I hope this is really quick.

1) Did you also check the sec-art and gen-art review. Both, as well as some ADs, suggested to (better) define such terms as Sojourn time, estimator, or Interval. Would it make sense to add something to the terminology section, or did you decide this is not needed?

2) Did you see Alia’s comments on mircoflows? I think it is true that in some cases you may also want to use additional information like the flow label or DSCP and not just the 5-tuple, while the text explicitly talks about 5-tuples. Do you want to add something here, or did you on purpose decide to only restrict to 5-tuples? I thinks this may be an unnecessary restriction and probably was not meant to be one.

3) Did you see this comment from Ekr:
"Following up on the above point, you must be able to
  drop packets when the queue is entirely full, but S
  4.4 doesn't seem to contemplate this. What is the impact
  of this? You just drop and ignore?“
Can you explain how this was addressed? Maybe I just missed that but it seems important.


> Am 12.09.2017 um 02:27 schrieb Jana Iyengar <>om>:
> ... draft-ietf-aqm-codel-08 is finally posted. This new version addresses all IESG comments during IESG review, in addition to review comments by Patrick Timmons and Yoav Nir. We thank everyone for their help with reviews. 
> Most importantly, I want to personally thank the fq_codel authors for sending me Yerba Mate, Dave Taht for sending me delicious freshly-baked cookies, and Paul McKenney for sending me a ton of organic green tea to help me move on the document. I will say that you all managed to do something nobody has managed so far: you successfully shamed me into getting this work done.
> I also received bungee cords from the fq_codel authors to tie myself to my chair with, which I put to good use: I would like to share here evidence of my atonement. (Cookies are not in the picture, because they were delicious. Thanks, Dave!)
> - jana
> (P.S.: I now look forward to receiving thank you gifts. Oh, and I'm caffeine-free and vegetarian, just in case.)