[e2e] host-level aggregated congestion control citations

Joe Touch touch at ISI.EDU
Fri Aug 31 17:43:39 PDT 2007

Hi, Dave,

Dave Crocker wrote:
> Folks,
> I am looking for a couple of citations, if there are any.
> Once upon a time, TCP did congestion control strictly on a
> per-connection behavior.  I seem to recall that there was later work on
> aggregating congestion information, to get better behavior across
> concurrent connections between the same host-pair.

The first work that did share some info was T/TCP,

In 1997, RFC2140 described exactly the above.

A few years later, the Congestion Manager (Sigcomm, RFC2134) presented a
mechanism outside TCP that integrates the information across many
protocol types, including UDP if desired.

> If this is in current use, I'd like to review the mechanism(s).

I believe bits of RFC2140 are in Linux, but don't know if they're
currently enabled:


Joe Touch                Sr. Network Engineer, USAF TSAT Space Segment
               Postel Center Director & Research Assoc. Prof., USC/ISI

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