We can call it UA recursion versus proxy forking. It's fine with me. 

> -----Original Message-----
> From: Christer Holmberg (JO/LMF) 
> [mailto:[EMAIL PROTECTED] 
> Sent: Tuesday, June 19, 2007 13:49
> To: Audet, Francois (SC100:3055); Vijay K. Gurbani
> Cc: IETF SIP List; Paul Kyzivat; Elwell,John; Dean Willis
> Subject: RE: [Sip] draft-gurbani-sip-sipsec-01
> 
> 
> Hi, 
> 
> >I call it UA forking (as opposed to proxy forking).
> 
> I don't think 3261 calls it UA forking.
> 
> When triggering requests based on a 3xx response, I think 
> 3261 talks about "recursion".
> 
> Regards,
> 
> Christer
> 
> 
> 
> 
> 
> 
> >I'm ok with calling it something else. 
> > 
> >I have a funny feeling that if we had made the distinction 
> clearer way 
> >back when we were discussing the merits of forking, we would 
> have had a 
> >different outcome.
> > 
> > > -----Original Message-----
> > > From: Christer Holmberg (JO/LMF)
> > > [mailto:[EMAIL PROTECTED]
> > > Sent: Tuesday, June 19, 2007 12:57
> > > To: Vijay K. Gurbani; Audet, Francois (SC100:3055)
> > > Cc: IETF SIP List; Paul Kyzivat; Elwell,John; Dean Willis
> > > Subject: RE: [Sip] draft-gurbani-sip-sipsec-01
> > > 
> > > 
> > > Hi,
> > > 
> > > A small comment.
> > > 
> > > I don't think we in the draft should say that the UA forks. 
> > > Because, I don't think the UA behavior is different from when it 
> > > receives a 3xx response for e.g. an initial INVITE, is it?
> > > It uses the contact in the response to initiates new
> > initial request. 
> > > We don't call that forking, do we?
> > > 
> > > Regards,
> > > 
> > > Christer
> > > 
> > > 
> > > 
> > > > -----Original Message-----
> > > > From: Vijay K. Gurbani [mailto:[EMAIL PROTECTED]
> > > > Sent: 19. kesäkuuta 2007 19:35
> > > > To: Francois Audet
> > > > Cc: IETF SIP List; Paul Kyzivat; Elwell,John; Dean Willis
> > > > Subject: Re: [Sip] draft-gurbani-sip-sipsec-01
> > > > 
> > > > Francois Audet wrote:
> > > > > Agreed.
> > > > > 
> > > > > Basically, say the "CONNECT" ended up in 3 different
> > > > directions after
> > > > > a 3XX with 3 contacts. The UAC would set up the 
> end-to-end TLS 
> > > > > connections from the UAC to the 3 contacts.
> > > > > 
> > > > > Then the INVITEs have no intermediaries, so they can't fork.
> > > > 
> > > > OK; returning a 3xx seems to be preferred.  Then, so 
> that we can 
> > > > update the next revision appropriately, here is some rough text:
> > > > 
> > > >    A proxy that accesses a location service to route a CONNECT
> > > >    request and discovers more than one contact bound to that
> > > >    AoR MUST format a 3xx-class response with the contacts
> > discovered
> > > >    from the location service.  This response is subsequently
> > > >    sent upstream.
> > > > 
> > > >    A proxy that receives a 3xx-class response as a result of
> > > >    proxying a CONNECT request downstream MUST NOT recurse on the
> > > >    receipt of the 3xx-class response.  Instead, it MUST send the
> > > >    response upstream.
> > > > 
> > > >    When a user agent receives a 3xx-class response from its
> > > >    downstream server with multiple Contact headers, it 
> MAY decide
> > > >    to fork in parallel or in serial depending on its software
> > > >    capabilities and configuration policies.  Alternatively, it
> > > >    MAY analyze the received Contact headers and choose 
> to send it
> > > >    to a particular destination that it suspects would stand the
> > > >    best chance of eliciting a successful response.
> > > > 
> > > > OK?
> > > > 
> > > > - vijay
> > > > --
> > > > Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
> > > > 2701 Lucent Lane, Rm. 9F-546, Lisle, Illinois 60532 (USA)
> > > > Email: [EMAIL PROTECTED],bell-labs.com,acm.org}
> > > > WWW:   http://www.alcatel-lucent.com/bell-labs
> > > > 
> > > > 
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> > 
> > 
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