Re: [MMUSIC] BUNDLE Weekly Summary: Assumptions

Paul Kyzivat <> Fri, 03 May 2013 15:26 UTC

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Date: Fri, 03 May 2013 10:55:25 -0400
From: Paul Kyzivat <>
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Subject: Re: [MMUSIC] BUNDLE Weekly Summary: Assumptions
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On 5/3/13 8:53 AM, Christer Holmberg wrote:
> Hi,
> In order to try to close issues on BUNDLE, based on the discussions
> we’ve had, I intend to update the BUNDLE draft based on the following
> assumptions:
> 1.We mandate usage of rtcp-mux when BUNDLE is used.

Are you going to include the possibility of bundling non-RTP m-lines?
(Needed if we are to include DTLS/SCTP.)

If so, then of course the use of rtcp-mux only applies to RTP m-lines.

(Of course, if only one DTLS/SCTP line can be included, a bundle without 
RTP is not very interesting. But it doesn't hurt to make this ready for 
future bundling of other things.)

> 2.SDP m- lines with a zero port value MUST NOT be put inside a BUNDLE
> group (not in an offer, nor in an answer). There will be a note
> indicating that, due to this, the number of m- lines associated with a
> BUNDLE group may differ between the offer and the associated answer.
> There will also be a note indicating that this is due to RFC 5888, in
> case people later start to wonder where the “MUST NOT” comes from.
> Please indicate if you OBJECT to any of these assumptions.

Aside from the above comment I have no objections.