Re: [AVT] I-D ACTION:draft-ietf-avt-rtp-and-rtcp-mux-06.txt

[Randell Jesup <rjesup at wgate.com>]

Colin Perkins <csp at csperkins.org> writes:
>On 26 Jul 2007, at 19:54, Randell Jesup wrote:
>> Internet-Drafts at ietf.org writes:
>>> Title		: Multiplexing RTP Data and Control Packets on a Single Port
>>> Filename	: draft-ietf-avt-rtp-and-rtcp-mux-06.txt

>I'll submit a -07, changing this to:
>
>       Note: since all RTCP packets MUST be sent as compound packets
>       beginning with an SR or an RR packet ([1] Section 6.1), one might
>       wonder why RTP payload types other than 72 and 73 are prohibited
>       when multiplexing RTP and RTCP.  This is done to ensure  robustness
>       against nodes which send non-compound RTCP packets, which might
>       otherwise be confused with multiplexed RTP packets.  At the time
>       of this writing, there is a proposal to allow non-compound RTCP
>       packets in some circumstances [17], so this robustness may become
>       more important in future.
>
>and adding the appropriate reference.

Looks good.

>> We should also discuss interaction with offering both "a=rtcp-mux" and
>> "a=rtcp <port>".  I can see an endpoint wanting (or needing) to  include
>> both.  The answer selects between rtcp-mux and "normal" rtcp handling
>> (including a=rtcp, though there's no direct way to know if the  answerer
>> supports it).
>
>This is discussed in section 5.1.1 of the draft. Please suggest text  if
>the current wording is not sufficient.

Aha, sorry, missed that.  The wording seems good.

-- 
Randell Jesup, Worldgate (developers of the Ojo videophone), ex-Amiga OS team
rjesup at wgate.com
"The fetters imposed on liberty at home have ever been forged out of the weapons
provided for defence against real, pretended, or imaginary dangers from abroad."
		- James Madison, 4th US president (1751-1836)


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