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[Fann] Re: Existing Implementation of Fast CNP

Michael Menth <michael.menth@uni-tuebingen.de> Mon, 27 July 2026 14:57 UTC

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From: Michael Menth <michael.menth@uni-tuebingen.de>
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Subject: [Fann] Re: Existing Implementation of Fast CNP
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Hi Xiao Min,

CNP reminds me of Backward Explicit Congestion Notification (BECN) in 
Frame Relay which was in the early 1990ies. I don't know which 
significance, deployment, and efficiency it had at that time. A short 
comparison of CNP and BECN may be interesting. There are obvious 
commonalities but certainly also significant differences.

Kind regards

Michael

Am 27.07.2026 um 05:19 schrieb xiao.min2@zte.com.cn:
> Hi all,
>
> At IETF 126 the first FANN WG meeting I presented the problems and gap 
> analysis for Fast CNP.
> After the meeting my co-author Zehua Hu sent me a white paper on the 
> existing implementation of Fast CNP.
> By using this link 
> (https://cloudswit.ch/whitepapers/fast-cnp-congestion-notification-technology/) 
> you may read that white paper and know more details on the existing 
> implementation of Fast CNP. AFAIK at least H3C and ZTE have 
> implemented Fast CNP in the similar way.
>
> Also note that I've resubmitted the three RTGWG individual drafts 
> relevant to my presentation in FANN WG. Links as below.
> https://datatracker.ietf.org/doc/html/draft-xiao-fann-fast-cnp-00
> https://datatracker.ietf.org/doc/html/draft-xiao-fann-fast-cnp-with-proxy-00
> https://datatracker.ietf.org/doc/html/draft-xiao-fann-congestion-notification-for-pause-00
> Welcome your review and comments!
>
> Cheers,
> Xiao Min
>
> _______________________________________________
> Fann mailing list --fann@ietf.org
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-- 
Prof. Dr. habil. Michael Menth
University of Tuebingen
Faculty of Science
Department of Computer Science
Chair of Communication Networks
Sand 13, 72076 Tuebingen, Germany
phone: (+49)-7071/29-70505
mailto:menth@uni-tuebingen.de
http://kn.cs.uni-tuebingen.de

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