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Re: [AVTCORE] Draft new: draft-holmberg-avtcore-5761-update-00

"Roni Even" <ron.even.tlv@gmail.com> Wed, 22 June 2016 21:23 UTC

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From: Roni Even <ron.even.tlv@gmail.com>
To: 'Christer Holmberg' <christer.holmberg@ericsson.com>, avt@ietf.org
References: <D386CB5E.AC1C%christer.holmberg@ericsson.com> <140601d1cc9d$9a49e1c0$cedda540$@gmail.com> <7594FB04B1934943A5C02806D1A2204B381009F3@ESESSMB209.ericsson.se>
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Date: Thu, 23 Jun 2016 00:22:22 +0300
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Subject: Re: [AVTCORE] Draft new: draft-holmberg-avtcore-5761-update-00
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inline

 

From: Christer Holmberg [mailto:christer.holmberg@ericsson.com] 
Sent: Wednesday, June 22, 2016 8:27 PM
To: Roni Even; avt@ietf.org
Subject: RE: [AVTCORE] Draft new: draft-holmberg-avtcore-5761-update-00

 

Hi,

 

>I have a comment and a nit

> 

> Comment:  I am not sure what this sentence means "and the answerer MUST
NOT multiplex RTP and > RTCP packets on a single port"

> The answerer cannot send multiplex RTP and RTCP packets if the attribute
is not there, it can either 

> send RTCP to RTP port+1 or to the port specified by the a=rtcp attribute.

 

It means that the answerer must not multiple RTP and RTCP packets on a
single point. Not sure I understand the issue :)

[Roni Even]If you mean that  the answerer MUST not send multiplex RTP/RTCP
it is implied by the lack of the attribute and by the definition of where
RTCP should go to, so the sentence is not needed. Do you mean that the
answerer MUST not receive multiplex RTP/RTCP streams?

That is tied to my question about can the answerer use a=RTCP to receive
multiplex RTP and RTCP without explicitly using rtcp-mux attribute?

 

> Nit: "the rules in Section 4" add of RFC5761

 

Keep in mind that the text is actually new RFC 5671 text. Do we want the
text to refer to its own RFC, or could add "of this specification" inste

 

Regards,

 

Christer

 

 

 

Roni 

 

 

 

 

From: avt [mailto:avt-bounces@ietf.org] On Behalf Of Christer Holmberg
Sent: Wednesday, June 15, 2016 9:04 AM
To: avt@ietf.org
Subject: [AVTCORE] Draft new: draft-holmberg-avtcore-5761-update-00

 

Hi,

 

I've submitted a new draft: draft-holmberg-avtcore-5761-update-00.

 

The draft clarifies that the a=rtcp-mux attribute is only allowed in an
answer if also present in the associated offer, and that the usage of
RTP/RTCP-mux is negotiated for both directions.

 

The need for this came from 3GPP, where people had different understandings
regarding the meaning of the current text.

 

For the GitHub fans: https://github.com/cdh4u/draft-5761-update (NOTE:
Personal repo)

 

Regards,

 

Christer

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