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Re: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 22 June 2021 17:13 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, Roman Shpount <roman@telurix.com>
CC: mmusic WG <mmusic@ietf.org>
Thread-Topic: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/MDqQ01FReQ0vvOF_weCldU5p1Mc>
Subject: Re: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00
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Hi,

I think it is important to keep in mind that the scope of 8843bis was only to fix the BUNDLE/JSEP alignment, and to implement some of the erratas.

Having said that, unless someone objects I am fine adding something like:

---

7.6. SIP Considerations

The Session Initiation Protocol (SIP) [RFC3261] allows a User Agent Client (UAC) to send a re-INVITE request without
an SDP body (sometimes referred to as an empty re-INVITE). In such cases the User Agent Server (UAS) will include an
SDP Offer in the associated 200 OK response. This is typically used for 3rd Party Call Control (3PCC)
scenarios. From a BUNDLE perspective, such SDP Offer SHOULD be generated as an Initial SDP Offer [Section7.2].

---

Regards,

Christer

-----Original Message-----
From: mmusic <mmusic-bounces@ietf.org> On Behalf Of Paul Kyzivat
Sent: perjantai 18. kesäkuuta 2021 20.49
To: Roman Shpount <roman@telurix.com>
Cc: mmusic WG <mmusic@ietf.org>
Subject: Re: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00

On 6/18/21 1:14 PM, Roman Shpount wrote:
> Let me be more specific -- I meant rules defined for initial SDP offer 
> in
> https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-02.html#s
> ection-7.2 
> <https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-02.html#
> section-7.2>, not all rules for initial SDP offers. Specifically, all 
> m= lines should either have a different address:port for each bundled 
> m= line and be prepared to receive media on these addresses or should 
> have port 0 and a=bundle-only

Ahh. OK.

	Thanks,
	Paul

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