[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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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

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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.