[aqm] Ted Lemon's Yes on draft-ietf-aqm-recommendation-09: (with COMMENT)
"Ted Lemon" <ted.lemon@nominum.com> Thu, 19 February 2015 12:54 UTC
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From: Ted Lemon <ted.lemon@nominum.com>
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Date: Thu, 19 Feb 2015 04:54:41 -0800
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Subject: [aqm] Ted Lemon's Yes on draft-ietf-aqm-recommendation-09: (with COMMENT)
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Ted Lemon has entered the following ballot position for draft-ietf-aqm-recommendation-09: Yes When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to http://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: http://datatracker.ietf.org/doc/draft-ietf-aqm-recommendation/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I'm quite surprised that the introduction doesn't mention the problems that high or unpredictable latency can cause with flows that are attempting to do congestion control at the ends (e.g., TCP). If I were reading this without already knowing about that, I would assume that the goal of this document is to reduce latency for the benefit of applications that require low latency, like VoIP and gaming. It would be nice if the introduction made mention of the issue of high latency as it affects TCP flows. The document also talks about congestion collapse as a future risk to be prevented, but I think that this isn't telling the whole story: users of the Internet see localized congestion collapse quite frequently, and have done for quite some time. It's essentially normal network behavior in hotels, cafes and on airplanes: anywhere where available bandwidth is substantially short of demand. I don't think this is a problem with technical accuracy, but I think someone reading this document who isn't an expert on congestion control might not realize that this document is talking about that specific sort of failure mode as well as failures deep in the network. I'm really happy to see this document being published. The above comments are just suggestions based on my particular concerns about congestion, and do not reflect any degree of expertise, so if they seem exceptionally clueless you should just ignore them.