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Re: [MMUSIC] Not fixing a=rtcp and rtcp-mux exclusive

Roman Shpount <roman@telurix.com> Thu, 21 January 2016 22:07 UTC

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Date: Thu, 21 Jan 2016 17:07:15 -0500
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From: Roman Shpount <roman@telurix.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>
Subject: Re: [MMUSIC] Not fixing a=rtcp and rtcp-mux exclusive
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On Thu, Jan 21, 2016 at 4:31 PM, Christer Holmberg <
christer.holmberg@ericsson.com> wrote:

> We can for sure define a new attribute, if people prefer that.
>

> But, it still wouldn't solve Paul's issue, that a non-ICE endpoint that
> doesn't support the attribute may start sending RTCP on RTP+1. But, at
> least the offerer would see from the answer that the answerer does not
> support mux-exclusive, and can take proper actions.
>

We can define new attribute that specifies address and port for both RTP
and RTCP similar to ICE candidate or a=rtcp attribute and set address in c=
line to IN IP4 0.0.0.0. This way any end point that does not understand
this attribute will send no media.
_____________
Roman Shpount

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