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Re: [MMUSIC] Mismatch between sdp-bundle-negotiation and RFC5888

Christer Holmberg <christer.holmberg@ericsson.com> Sun, 02 December 2018 11:32 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Roman Shpount <roman@telurix.com>
CC: mmusic WG <mmusic@ietf.org>
Thread-Topic: Mismatch between sdp-bundle-negotiation and RFC5888
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Date: Sun, 02 Dec 2018 11:32:09 +0000
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Subject: Re: [MMUSIC] Mismatch between sdp-bundle-negotiation and RFC5888
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Hi,

>>> I know this is a really late notice, but I think there is a slight mismatch between RFC5888 and sdp-bundle.
>>> 
>>> RFC 5888 Section 9.2 (https://tools.ietf.org/html/rfc5888#section-9.2) says: 
>>> 
>>>   SIP entities refuse media streams by setting the port to zero in the corresponding "m" line. "a=group" lines MUST NOT 
>>>   contain identification-tags that correspond to "m" lines with the port set to zero.
>>> 
>>> Considering that sdp-bundle redefines the meaning of port zero when 'bundle-only' attribute is present, RFC5888 will need 
>>> to be updated to allow including bundle-only media streams in the "a=group" lines.
>>
>>…or, one could argue that the text in RFC5888 only applies to the case when port zero is used to refuse a media stream. 
>
> One could argue this, but the language in RFC 5888 is quite blunt.

So, you really want to bring BUNDLE back to the WG again?

Regards,

Christer

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