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Re: [rtcweb] BUNDLE with implicit rtcp-mux

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 12 March 2014 09:13 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>, Justin Uberti <juberti@google.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>, Eric Rescorla <ekr@rtfm.com>
Thread-Topic: [rtcweb] BUNDLE with implicit rtcp-mux
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Date: Wed, 12 Mar 2014 09:13:45 +0000
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Archived-At: http://mailarchive.ietf.org/arch/msg/rtcweb/2sM5PSucDsccetBD4iQ8gfb9B6s
Subject: Re: [rtcweb] BUNDLE with implicit rtcp-mux
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Hi,

>> It may be that we agree, but talk past each other :)
>> 
>> My understanding of bundle-only has been that it is a mechanism to 
>> ensure that the m- line is accepted only if the BUNDLE group is 
>> accepted, e.g. in order to avoid having to reserve extra ports. BUT, 
>> the bundle-only m- lines are NOT used to negotiate the actual BUNDLE 
>> address - they will inherit the selected BUNDLE address, negotiated 
>> using non-bundle-only m- lines.
>> 
>
> I think we are agreeing. I think my main point is that the m= blocks that contains bundle-only needs to contain the attribute a=rtcp-mux if that is included in the first m= block for the bundle group that contains the actual addresses. 
> Similar with the a=rtcp attribute. Simply to be explicit that they are configured similarly. 

Correct.

> This I think implies that we need a "to be replaced" value also for a=rtcp in the bundle only m= blocks.

Yes.

Regards,

Christer

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