I was somewhat surprised to see this back in LC. I am still not aware of any
use case where this actually helps. I searched the IETF and WG lists for email
with the subject draft-ietf-sipcore-199 and I do not see a single email that
suggests there is support for this draft or the changes in it since the
previous LC.
This draft has no use that I understand how it helps - it is at best a very
limited optimization. The SIP standards is already too complicated with too
many extensions. I believe this draft makes SIP worse.Thought the draft
mandates that systems need to work even when the 199 are lost, I do not think
that is how the proponents of the work intent to use. I could be very wrong but
I presume that people intent to use to control middle boxes that control media
gates. It's broken for that but given that is not discussed in the draft, it's
hard to discuss how it is broken and what would be needed to fix it.
I do not support publishing this draft as standards track without actual WG
discussion on what the problem is this draft solves and if there is WG
consensus that problem is worth solving.
On Feb 7, 2011, at 10:02 AM, The IESG wrote:
The IESG has received a request from the Session Initiation Protocol Core
WG (sipcore) to consider the following document:
- 'Session Initiation Protocol (SIP) Response Code for Indication of
Terminated Dialog'
<draft-ietf-sipcore-199-05.txt> as a Proposed Standard
This is the second IETF last call for this document. The previous last call
was on version -02.
While resolving review comments, an issue with the interaction of the 199
response and the
100rel extension was identified and addressed by the SIPCORE working group. A
full summary
of the changes are available in section 13 of the document.
The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf(_at_)ietf(_dot_)org mailing lists by 2011-02-21. Exceptionally, comments
may be
sent to iesg(_at_)ietf(_dot_)org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.
Abstract
This specification defines a new Session Initiation Protocol (SIP)
response code, 199 Early Dialog Terminated, that a SIP forking proxy
and a User Agent Server (UAS) can use to indicate towards upstream
SIP entities (including the User Agent Client (UAC)) that an early
dialog has been terminated, before a final response is sent towards
the SIP entities.
The file can be obtained via
http://datatracker.ietf.org/doc/draft-ietf-sipcore-199/
IESG discussion can be tracked via
http://datatracker.ietf.org/doc/draft-ietf-sipcore-199/
No IPR declarations have been submitted directly on this I-D.
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