[e2e] end2end-interest Digest, Vol 76, Issue 1

[Arjuna]

Dear Deltef,
  Its RFC 2861 - CWV Validation.

FYI - we have been working on this for the last few years and have a PhD
student who is working on this --bursty apps over TCP and how they should
respond after idle/data-limited periods etc..Please do let us know if you
require any info on this :)

Regards
Arjuna

> -----Original Message-----
> From: end2end-interest-bounces at postel.org [mailto:end2end-interest-
> bounces at postel.org] On Behalf Of end2end-interest-request at postel.org
> Sent: 05 July 2010 20:00
> To: end2end-interest at postel.org
> Subject: end2end-interest Digest, Vol 76, Issue 1
> 
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> Today's Topics:
> 
>    1. CWND handling in idle periods (Detlef Bosau)
>    2. Re: CWND handling in idle periods (Wim Lamotte)
>    3. Re: CWND handling in idle periods (John Heffner)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 05 Jul 2010 14:27:21 +0200
> From: Detlef Bosau <detlef.bosau at web.de>
> Subject: [e2e] CWND handling in idle periods
> To: end2end-interest at postel.org
> Message-ID: <4C31CFA9.2070107 at web.de>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Hi,
> 
> IIRC, TCP halves its CWND when being idle for a certain period of time.
> IIRC, there is an RFC where this is specified. Does someone happen do
> know the number?
> 
> Thx
> 
> Detlef
> 
> --
> -----------------------------------------------------------------------
> -
> Detlef Bosau             Galileistra?e 30                70565
> Stuttgart
> Tel.: +49 711 5208031    mobile: +49 172 6819937    skype:
> detlef.bosau
> ICQ: 566129673           detlef.bosau at web.de  http://www.detlef-
> bosau.de
> -----------------------------------------------------------------------
> -
> 
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Mon, 5 Jul 2010 15:54:41 +0200
> From: "Wim Lamotte" <Wim.Lamotte at uhasselt.be>
> Subject: Re: [e2e] CWND handling in idle periods
> To: <end2end-interest at postel.org>
> Message-ID: <002d01cb1c49$9dfb3ef0$d9f1bcd0$@Lamotte at uhasselt.be>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> Hi Detlef,
> 
> Isn't this section 4.1 in RFC 5681? This section says that the cwnd
> should
> restart at the initial congestion window size.
> 
> In RFC 2862, Handley et al. proposed "that after an idle period, the
> TCP
> sender should reduce its congestion window by half for every RTT that
> the
> flow has remained idle" - but this is an experimental extension afaik.
> 
> Regards,
> 
> Wim
> --
> Prof. dr. Wim Lamotte
> Hasselt University
> Wetenschapspark 2 - 3590 Diepenbeek
> Belgium
> 
> 
> > -----Original Message-----
> > From: end2end-interest-bounces at postel.org [mailto:end2end-interest-
> > bounces at postel.org] On Behalf Of Detlef Bosau
> > Sent: maandag 5 juli 2010 14:27
> > To: end2end-interest at postel.org
> > Subject: [e2e] CWND handling in idle periods
> >
> > Hi,
> >
> > IIRC, TCP halves its CWND when being idle for a certain period of
> time.
> > IIRC, there is an RFC where this is specified. Does someone happen do
> > know the number?
> >
> > Thx
> >
> > Detlef
> >
> > --
> > ---------------------------------------------------------------------
> --
> > -
> > Detlef Bosau             Galileistra?e 30                70565
> > Stuttgart
> > Tel.: +49 711 5208031    mobile: +49 172 6819937    skype:
> > detlef.bosau
> > ICQ: 566129673           detlef.bosau at web.de  http://www.detlef-
> > bosau.de
> > ---------------------------------------------------------------------
> --
> > -
> 
> 
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Mon, 5 Jul 2010 10:06:57 -0400
> From: John Heffner <johnwheffner at gmail.com>
> Subject: Re: [e2e] CWND handling in idle periods
> To: Detlef Bosau <detlef.bosau at web.de>
> Cc: end2end-interest at postel.org
> Message-ID:
> 	<AANLkTilhgpO4aAdGsqakS0hsRo6KL05DCvTymJz65cQl at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> I think you're looking for RFC2861: TCP Congestion Window Validation.
> 
>   -John
> 
> 
> On Mon, Jul 5, 2010 at 8:27 AM, Detlef Bosau <detlef.bosau at web.de>
> wrote:
> > Hi,
> >
> > IIRC, TCP halves its CWND when being idle for a certain period of
> time.
> > IIRC, there is an RFC where this is specified. Does someone happen do
> know
> > the number?
> >
> > Thx
> >
> > Detlef
> >
> > --
> > ---------------------------------------------------------------------
> ---
> > Detlef Bosau ? ? ? ? ? ? Galileistra?e 30 ? ? ? ? ? ? ? ?70565
> Stuttgart
> > Tel.: +49 711 5208031 ? ?mobile: +49 172 6819937 ? ?skype:
> ?detlef.bosau
> > ICQ: 566129673 ? ? ? ? ? detlef.bosau at web.de ?http://www.detlef-
> bosau.de
> > ---------------------------------------------------------------------
> ---
> >
> >
> >
> 
> 
> 
> ------------------------------
> 
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> End of end2end-interest Digest, Vol 76, Issue 1
> ***********************************************