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[AVTCORE] Re: Errata on RFC 8888 - number of reports

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Wed, 15 January 2025 10:12 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: "Dale R. Worley" <worley@ariadne.com>
Thread-Topic: [AVTCORE] Re: Errata on RFC 8888 - number of reports
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Date: Wed, 15 Jan 2025 10:12:29 +0000
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CC: "avt@ietf.org" <avt@ietf.org>, "harald@alvestrand.no" <harald@alvestrand.no>, Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
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Subject: [AVTCORE] Re: Errata on RFC 8888 - number of reports
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Hi

The SCReAM code on 
https://github.com/EricssonResearch/scream 
Is wired wrongly but I will update the code next week. 

Currently the error in SCReAM is not a big issue as it does not AFAIK interoperate with other implementations.

/Ingemar


> -----Original Message-----
> From: Dale R. Worley <worley@ariadne.com>
> Sent: Tuesday, 14 January 2025 22:36
> To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
> Cc: avt@ietf.org
> Subject: Re: [AVTCORE] Re: Errata on RFC 8888 - number of reports
> 
> [Du får inte e-post ofta från worley@ariadne.com. Läs om varför det här
> är viktigt på https://aka.ms/LearnAboutSenderIdentification ]
> 
> Ingemar Johansson S <ingemar.s.johansson=40ericsson.com@dmarc.ietf.org>
> writes:
> > Is there an agreement that the proposed change is what should be used,
> > or should this be handled at the next IETF meeting ?
> 
> The erratum (8166) is marked "verified", so we've already reached
> consensus that it's correct.  Looking at the text myself, an a-priori
> analysis suggests that the erratum is correct, as otherwise "a sequence
> number in the range begin_seq to begin_seq+num_reports inclusive"
> contains "num_reports+1" values, which seems like it is not intended.
> 
> The only open question I can see is whether implementations generate and
> consume RTCP messages of this format (i.e., PT=205 and FMT=11) using the
> revised specification.  Harald says that the revised format is already
> in use.
> 
> Dale

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