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

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.

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@softarmor.com] 
> Sent: Thursday, October 02, 2008 15:56
> To: Paul Kyzivat
> Cc: Audet, Francois (SC100:3055); Cullen Jennings; Rohan 
> Mahy; sip@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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