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Re: [Sip] configuration NOTIFY in example 9.1 of outbound i-d

I guess our replies overlapped.

Francois Audet wrote:

My take on this is that Juha is right and the document should really say:

	If the UAC is sending a dialog-forming request, and wants all
	subsequent requests in the dialog to arrive over the same
flow, the UAC MUST add an 'ob' parameter to its Contact header. [ DELETE NEXT SENTENCE ENTIRELY ] 

In other words, GRUU is orthogonal and does NOT imply "ob" behavior.
Not quite. If you have obtained a gruu after registering a contact with outbound, you don't have to put "ob" on the gruu. It wouldn't help, since it would get lost in the process of translating the gruu. 

	Thanks,
	Paul


Clean and simple, and I *think* this was our intent (i.e., I think
this is an historical oversight).

Cullen, can you confirm or clarify?


-----Original Message-----
From: Dean Willis [mailto:dean.willis at softarmor.com] Sent: Thursday, October 02, 2008 15:56 
To: Paul Kyzivat
Cc: Audet, Francois (SC100:3055); Cullen Jennings; Rohan Mahy; sip at ietf.org 
Subject: Re: [Sip] configuration NOTIFY in example 9.1 of outbound i-d


On Sep 29, 2008, at 3:26 PM, Paul Kyzivat wrote:



Francois Audet wrote:

Section 4.3 states (UA procedures):
   If the UAC is sending a dialog-forming request, and wants all
   subsequent requests in the dialog to arrive over the same

flow, the

   UAC adds an 'ob' parameter to its Contact header.  Typically

this is

   desirable, but it is not necessary for example if the Contact

is a

   GRUU [I-D.ietf-sip-gruu].
if contact is gruu, does it mean that 'ob' param is implicitly included?
I am not sure why this is worded like this. I was thinking
that using
a GRUU as a contact in a dialog-forming request would mandate that requests sent to that Contact would be sent using the same
flow, but 
I see no such rule in draft-ietf-sip-gruu.

Gruu isn't dependent on outbound.



So explain this one for me, please.
Is it that, if the gruu was formed using outbound (that is, the "real" contact for which the gruu is an alias has an "ob") use of the gruu will use the "ob" in the dereferencing at the gruu-provider?
So for the example referenced above may be correct, but incomplete -- it should talk about whether or not the gruu was formed using outbound, not just whether or not the contact isa gruu. 

--
Dean








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